Biomes By Keneisha Boozer
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Articles
Biome types 1 Biome 1 Habitat 10
What is happening to our planet 12 Ecology 12 Global warming 45 References Article Sources and Contributors 72 Image Sources, Licenses and Contributors 76 Article Licenses License 78 1
Biome types
Biome
Biomes are climatically and geographically defined as similar climatic conditions on the Earth, such as communities of plants, animals, and soil organisms,[1] and are often referred to as ecosystems. Some parts of the earth have more or less the same kind of abiotic and biotic factors spread over a large area, creating a typical ecosystem over that area. Such major ecosystems are termed as biomes. Biomes are defined by factors such as plant structures (such as trees, shrubs, and grasses), leaf types (such as broadleaf and needleleaf), plant spacing (forest, woodland, savanna), and climate. Unlike ecozones, biomes are not defined by genetic, taxonomic, or historical similarities. Biomes are often identified with particular patterns of ecological succession and climax vegetation (quasiequilibrium state of the local ecosystem). The planet Earth An ecosystem has many biotopes and a biome is a major habitat type. A major habitat type, however, is a compromise, as it has an intrinsic inhomogeneity.
The biodiversity characteristic of each extinction, especially the diversity of fauna and subdominant plant forms, is a function of abiotic factors and the biomass productivity of the dominant vegetation. In terrestrial biomes, species diversity tends to correlate positively with net primary productivity, moisture availability, and temperature.[2] Ecoregions are grouped into both biomes and ecozones. A fundamental classification of biomes is: 1. Terrestrial (land) biomes 2. Aquatic biomes (including freshwater biomes and marine biomes) Biomes are often known in English by local names. For example, a temperate grassland or shrubland biome is known commonly as steppe in central Asia, prairie in North America, and pampas in South America. Tropical grasslands are known as savanna in Australia, whereas in southern Africa it is known as certain kinds of veld (from Afrikaans). Sometimes an entire biome may be targeted for protection, especially under an individual nation's biodiversity action plan. Climate is a major factor determining the distribution of terrestrial biomes. Among the important climatic factors are: • Latitude: Arctic, boreal, temperate, subtropical, tropical • Humidity: humid, semihumid, semiarid, and arid • seasonal variation: Rainfall may be distributed evenly throughout the year or be marked by seasonal variations. • dry summer, wet winter: Most regions of the earth receive most of their rainfall during the summer months; Mediterranean climate regions receive their rainfall during the winter months. • Elevation: Increasing elevation causes a distribution of habitat types similar to that of increasing latitude. Biome 2
The most widely used systems of classifying biomes correspond to latitude (or temperature zoning) and humidity. Biodiversity generally increases away from the poles towards the equator and increases with humidity.
Biome classification schemes In this scheme, climates are classified based on the biological effects of temperature and rainfall on vegetation under the assumption that these two abiotic factors are the largest determinants of the type of vegetation found in an area. Holdridge uses the four axes to define 30 so-called "humidity provinces", which are clearly visible in the Holdridge diagram. While his scheme largely ignores soil and sun exposure, Holdridge did acknowledge that these, too, were important factors in biome determination.
Holdridge scheme Biomes are classification schemes which define biomes using climatic parameters. Particularly in the 1970s and 1980s, there was a significant push to understand the relationships between these climatic parameters and properties of ecosystem energetics because such discoveries would enable the prediction of rates of energy capture and transfer among components within ecosystems. Such a study was conducted by Sims et al. (1978) on North American grasslands. The study found a positive logistic correlation between evapotranspiration in mm/yr and above-ground net primary production in g/m^2/yr. More general results from the study were that precipitation and water use lead to above-ground primary production, solar radiation and temperature lead to belowground primary production (roots), and temperature and water lead to cool and warm season growth habit.[3] These findings help explain the categories used in Holdridge’s bioclassification scheme, which were then later simplified in Whittaker’s. The number of classification schemes and the variety of determinants used in those schemes, however, should be taken as strong indicators that biomes do not all fit perfectly into the classification schemes created.
Whittaker's biome-type classification scheme Whittaker appreciated biome-types as a representation of the great diversity of the living world, and saw the need to establish a simple way to classify them. He based his classification scheme on two abiotic factors: precipitation and temperature. His scheme can be seen as a simplification of Holdridge's, one more readily accessible, but perhaps missing the greater specificity that Holdridge's provides. Whittaker based his representation of global biomes on both previous theoretical assertions and an ever-increasing empirical sampling of global ecosystems. He was in a unique position to make such a holistic assertion because he had previously compiled a review of biome classification.[4]
Key definitions for understanding Whittaker's scheme • Physiognomy: The apparent characteristics, outward features, or appearance of ecological communities or species • Biome: a grouping of terrestrial ecosystems on a given continent that are similar in vegetation structure, physiognomy, features of the environment and characteristics of their animal communities • Formation: a major kind of community of plants on a given continent • Biome-type: grouping of convergent biomes or formations of different continents, defined by physiognomy • Formation-type: a grouping of convergent formations Whittaker's distinction between biome and formation can be simplified: formation is used when applied to plant communities only, while biome is used when concerned with both plants and animals. Whittaker's convention of biome-type or formation-type is simply a broader method to categorize similar communities.[5] Biome 3
Whittaker's parameters for classifying biome-types Whittaker, seeing the need for a simpler way to express the relationship of community structure to the environment, used what he called “gradient analysis” of ecocline patterns to relate communities to climate on a worldwide scale. Whittaker considered four main ecoclines in the terrestrial realm.[6] 1. Intertidal levels: The wetness gradient of areas that are exposed to alternating water and dryness with intensities that vary by location from high to low tide 2. Climatic moisture gradient 3. Temperature gradient by altitude 4. Temperature gradient by latitude Along these gradients, Whittaker noted several trends that allowed him to qualitatively establish biome-types. • The gradient runs from favorable to extreme, with corresponding changes in productivity. • Changes in physiognomic complexity vary with the favorability of the environment (decreasing community structure and reduction of stratal differentiation as the environment becomes less favorable). • Trends in diversity of structure follow trends in species diversity; alpha and beta species diversities decrease from favorable to extreme environments. • Each growth-form (i.e. grasses, shrubs, etc.) has its characteristic place of maximum importance along the ecoclines. • The same growth forms may be dominant in similar environments in widely different parts of the world. Whittaker summed the effects of gradients (3) and (4) to get an overall temperature gradient, and combined this with gradient (2), the moisture gradient, to express the above conclusions in what is known as the Whittaker classification scheme. The scheme graphs average annual precipitation (x-axis) versus average annual temperature (y-axis) to classify biome-types.
Walter system The Heinrich Walter classification scheme, developed by Heinrich Walter, a German ecologist, differs from both the Whittaker and Holdridge schemes because it takes into account the seasonality of temperature and precipitation. The system, also based on precipitation and temperature, finds 9 major biomes, with the important climate traits and vegetation types summarized in the accompanying table. The boundaries of each biome correlate to the conditions of moisture and cold stress that are strong determinants of plant form, and therefore the vegetation that defines the region. Extreme conditions, such as flooding in a swamp, can create different kinds of communities within the same biome. • I: Equatorial • Always moist and lacking temperature seasonality • Evergreen tropical rain forest • II: Tropical • Summer rainy season and cooler “winter” dry season • Seasonal forest, scrub, or savanna • III: Subtropical • Highly seasonal, arid climate • Desert vegetation with considerable exposed surface • IV: Mediterranean • Winter rainy season and summer drought • Sclerophyllous (drought-adapted), frost-sensitive shrublands and woodlands • V: Warm temperate • Occasional frost, often with summer rainfall maximum Biome 4
• Temperate evergreen forest, somewhat frost-sensitive • VI: Nemoral • Moderate climate with winter freezing • Frost-resistant, deciduous, temperate forest • VII: Continental • Arid, with warm or hot summers and cold winters • Grasslands and temperate deserts • VIII: Boreal • Cold temperate with cool summers and long winters • Evergreen, frost-hardy, needle-leaved forest (taiga) • IX: Polar • Very short, cool summers and long, very cold winters • Low, evergreen vegetation, without trees, growing over permanently frozen soils
Bailey system Robert G. Bailey almost developed a biogeographical classification system for the United States in a map published in 1976. He subsequently expanded the system to include the rest of South America in 1981, and the world in 1989. The Bailey system, based on climate, is divided into seven domains (polar, humid temperate, dry, humid, and humid tropical), with further divisions based on other climate characteristics (subarctic, warm temperate, hot temperate, and subtropical; marine and continental; lowland and mountain).[7] • 100 Polar Domain • 120 Tundra Division • M120 Tundra Division - Mountain Provinces • 130 Subarctic Division • M130 Subarctic Division - Mountain Provinces • 200 Humid Temperate Domain • 210 Warm Continental Division • M210 Warm Continental Division - Mountain Provinces • 220 Hot Continental Division • M220 Hot Continental Division - Mountain Provinces • 230 Subtropical Division • M230 Subtropical Division - Mountain Provinces • 240 Marine Division • M240 Marine Division - Mountain Provinces • 250 Prairie Division • 260 Mediterranean Division • M260 Mediterranean Division - Mountain Provinces • 300 Dry Domain • 310 Tropical/Subtropical Steppe Division • M310 Tropical/Subtropical Steppe Division - Mountain Provinces Biome 5
WWF system A team of biologists convened by the World Wide Fund for Nature (WWF) developed an ecological land classification system that identified fourteen biomes,[8] called major habitat types, and further divided the world's land area into 867 terrestrial ecoregions. Each terrestrial ecoregion has a specific EcoID, fomat XXnnNN (XX is the ecozone, nn is the biome number, NN is the individual number). This classification is used to define the Global 200 list of ecoregions identified by the WWF as priorities for conservation. The WWF major habitat types are: • 01 Tropical and subtropical moist broadleaf forests (tropical and subtropical, humid) • 02 Tropical and subtropical dry broadleaf forests (tropical and subtropical, semihumid) • 03 Tropical and subtropical coniferous forests (tropical and subtropical, semihumid) • 04 Temperate broadleaf and mixed forests (temperate, humid) • 05 Temperate coniferous forests (temperate, humid to semihumid) • 06 Boreal forests/taiga (subarctic, humid) • 07 Tropical and subtropical grasslands, savannas, and shrublands (tropical and subtropical, semiarid) • 08 Temperate grasslands, savannas, and shrublands (temperate, semiarid) • 09 Flooded grasslands and savannas (temperate to tropical, fresh or brackish water inundated) • 10 Montane grasslands and shrublands (alpine or montane climate) • 11 Tundra (Arctic) • 12 Mediterranean forests, woodlands, and scrub or sclerophyll forests (temperate warm, semihumid to semiarid with winter rainfall) • 13 Deserts and xeric shrublands (temperate to tropical, arid) • 14 Mangrove (subtropical and tropical, salt water inundated)
Freshwater biomes According to the WWF, the following are classified as freshwater biomes:[9]
• Large lakes • Temperate upland rivers • Large river deltas • Tropical and subtropical coastal rivers • Polar freshwaters • Tropical and subtropical floodplain rivers and wetlands • Montane freshwaters • Tropical and subtropical upland rivers • Temperate coastal rivers • Xeric freshwaters and endorheic basins • Temperate floodplain rivers and wetlands • Oceanic islands
• Streams and rivers
Realms or ecozones (terrestrial and freshwater, WWF)
• NA Nearctic • AA Australasia • PA Palearctic • NT Neotropic • AT Afrotropic • OC Oceania • IM Indomalaya • AN Antarctic
Marine biomes
Marine biomes (H) (major habitat types), Global 200 (WWF) Biomes of the coastal and continental shelf areas (neritic zone - List of ecoregions (WWF)) • Polar • Temperate shelves and sea • Temperate upwelling • Tropical upwelling Biome 6
• Tropical coral[10]
Realms or ecozones (marine, WWF)
• North temperate Atlantic • Western Indo-Pacific • Eastern tropical Atlantic • South temperate Indo-Pacific • Western tropical Atlantic • Southern Ocean • South temperate Atlantic • Antarctic • North temperate Indo-Pacific • Arctic • Central Indo-Pacific • Mediterranean • Eastern Indo-Pacific
Other marine habitat types • Hydrothermal vents • Cold seeps • Benthic zone • Pelagic zone (trades and westerlies) • Abyssal • Hadal (ocean trench)
Major habitats, nonglobal 200 (WWF) • Littoral/Intertidal zone • Kelp forest • Pack ice
Summary - ecological taxonomy (WWF) • Biosphere (List of ecoregions) • Ecozones or realms (8) • Terrestrial biomes (major habitat types, 14) • Ecoregions (867) vbn, • Ecosystems (biotopes) • Freshwater biomes (major habitat types, 12) • Ecoregions (426) • Ecosystems (biotopes) • Marine ecozones or realms (13) • Continental Shelf biomes (major habitat types, 5) • (Marine provinces) (62) • Ecoregions (232) • Ecosystems (biotopes) • Open & Deep Sea Biomes (major habitat types) • Endolithic biome Example • Biosphere • Ecozone: Palearctic ecozone • Terrestrial biome: temperate broadleaf and mixed forests Biome 7
• Ecoregion: Dinaric Mountains mixed forests (PA0418) • Ecosystem: Orjen, vegetation belt between 1,100- 1,450 m, Oromediterranean zone, nemoral zone (temperate zone) • Biotope: Oreoherzogio-Abietetum illyricae Fuk. (Plant list) • Plant: Silver fir (Abies alba)
Anthropogenic biomes Humans have fundamentally altered global patterns of biodiversity and ecosystem processes. As a result, vegetation forms predicted by conventional biome systems are rarely observed across most of Earth's land surface. Anthropogenic biomes provide an alternative view of the terrestrial biosphere based on global patterns of sustained direct human interaction with ecosystems, including agriculture, human settlements, urbanization, forestry and other uses of land. Anthropogenic biomes offer a new way forward in ecology and conservation by recognizing the irreversible coupling of human and ecological systems at global scales and moving us toward an understanding how best to live in and manage our biosphere and the anthropogenic biosphere we live in. The main biomes in the world are freshwater, marine, coniferous, deciduous, ice, mountains, boreal, grasslands, tundra, and rainforests.
Major anthropogenic biomes • Dense settlements • Villages • Croplands • Rangelands • Forested Biome 8
Other biomes The endolithic biome, consisting entirely of microscopic life in rock pores and cracks, kilometers beneath the surface, has only recently been discovered, and does not fit well into most classification schemes.
Map of biomes
Freshwater biomes
The drainage basins of the principal oceans and seas of the world are marked by continental divides. The grey areas are endorheic basins that do not drain to the ocean. Biome 9
References
[1] The World's Biomes (http:/ / www. ucmp. berkeley. edu/ exhibits/ biomes/ index. php), Retrieved August 19, 2008, from University of
California Museum of Paleontology (http:/ / www. ucmp. berkeley. edu/ index. php)
[2] Pidwirny, Michael (2006-10-16). "Biomes" (http:/ / www. eoearth. org/ article/ Biomes). In Sidney Draggan. Encyclopedia of Earth. Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment. . Retrieved 2006-11-16. [3] Pomeroy, Lawrence R. and James J. Alberts, editors. Concepts of Ecosystem Ecology. New York: Springer-Verlag, 1988. [4] Whittaker, Robert H., Botanical Review, Classification of Natural Communities, Vol. 28, No. 1 (Jan-Mar 1962), pp. 1-239. [5] Whittaker, Robert H. Communities and Ecosystems New York: MacMillan Publishing Company, Inc., 1975. [6] Whittaker, Robert H. Communities and Ecosystems New York: MacMillan Publishing Company, Inc., 1975.
[7] http:/ / www. fs. fed. us/ land/ ecosysmgmt/ index. html Bailey System, US Forest Service
[8] Olson, David M. et al. (2001); Terrestrial Ecoregions of the World (http:/ / www. csrc. sr. unh. edu/ ~palace/ cerrado/ olson et al. (world veg
map). pdf): A New Map of Life on Earth, BioScience, Vol. 51, No. 11., pp. 933-938.
[9] "Freshwater Ecoregions of the World: Major Habitat Types" (http:/ / www. feow. org/ mht. php). Accessed May 12, 2008.
[10] WWF: Marine Ecoregions of the World (http:/ / www. worldwildlife. org/ science/ ecoregions/ marine/ item1266. html)
External links
• Biomes of the world (Missouri Botanic Garden) (http:/ / mbgnet. mobot. org)
• Global Currents and Terrestrial Biomes Map (http:/ / www. theglobaleducationproject. org/ earth/ global-ecology. php#3)
• WorldBiomes.com (http:/ / www. worldbiomes. com/ ) is a site covering the 5 principal world biome types: aquatic, desert, forest, grasslands, and tundra.
• UWSP's online textbook The Physical Environment: - Earth Biomes (http:/ / www. uwsp. edu/ geo/ faculty/ ritter/
geog101/ textbook/ biomes/ outline. html)
• Panda.org's Habitats (http:/ / wwf. panda. org/ about_our_earth/ ecoregions/ about/ habitat_types/ ) - describes the 14 major terrestrial habitats, 7 major freshwater habitats, and 5 major marine habitats.
• Panda.org's Habitats Simplified (http:/ / wwf. panda. org/ about_our_earth/ ecoregions/ about/ habitat_types/
habitats/ ) - provides simplified explanations for 10 major terrestrial and aquatic habitat types.
• UCMP Berkeley's The World's Biomes (http:/ / www. ucmp. berkeley. edu/ glossary/ gloss5/ biome/ ) - provides lists of characteristics for some biomes and measurements of climate statistics.
• Gale/Cengage has an excellent Biome Overview (http:/ / www. galeschools. com/ environment/ biomes/
overview. htm) of terrestrial, aquatic, and man-made biomes with a particular focus on trees native to each, and has detailed descriptions of desert, rain forest, and wetland biomes.
• NASA's Earth Observatory Mission: Biomes (http:/ / earthobservatory. nasa. gov/ Experiments/ Biome/ ) gives an exemplar of each biome that is described in great detail and provides scientific measurements of the climate statistics that define each biome. Habitat 10 Habitat
A habitat (which is Latin for "it inhabits") is an ecological or environmental area that is inhabited by a particular species of animal, plant, or other type of organism.[1][2] It is the natural environment in which an organism lives, or the physical environment that surrounds (influences and is utilized by) a species population.[3]
Definition
The term "population" is preferred to "organism" because, while it is possible to describe the habitat of a single turtle, it is also possible that one may not find any particular or individual bear but the grouping of bears that constitute a breeding population and occupy a certain The remaining fragmented habitats of the African Elephant. biogeographical area. Further, this habitat could be somewhat different from the habitat of another group or population of black bears living elsewhere. Thus it is neither the species nor the individual for which the term habitat is typically used.
Microhabitat
The term microhabitat is often used to describe the small-scale physical requirements of a particular organism or population. A distribution map showing the range and Monotypic habitat breeding grounds of Great Black-backed Gulls.
The monotypic habitat occurs in botanical and zoological contexts, and is a component of conservation biology. In restoration ecology of native plant communities or habitats, some invasive species create monotypic stands that replace and/or prevent other species, especially indigenous ones, from growing there. A dominant colonization can occur from retardant chemicals exuded, nutrient monopolization, or from lack of natural controls such as herbivores or climate, that keep them in balance with their native habitats. The yellow starthistle, Centaurea solstitialis, is a botanical monotypic-habitat example of this, currently dominating over 15000000 acres (unknown operator: u'strong' km2) in California alone.[4][5] The non-native freshwater zebra mussel, Dreissena polymorpha, that colonizes areas of the Great Lakes and the Mississippi River watershed, without its home-range predator control, is a zoological monotypic-habitat example.
Even though its name may seem to imply simplicity as compared with polytypic habitats, the monotypic habitat can be complex.[6] Habitat 11
References [1] Dickinson, C.I. 1963. British Seaweeds. The Kew Series [2] Abercrombie, M., Hickman, C.J. and Johnson, M.L. 1966.A Dictionary of Biology. Penguin Reference Books, London
[3] "Living Things: Habitats and Ecosystems" (http:/ / www. fi. edu/ tfi/ units/ life/ habitat/ habitat. html). The Franklin Institute. . Retrieved 29 June 2011.
[4] Mount Diablo Review, Autumn 2007 (http:/ / www. mdia. org/ PDF Files/ MD Review Autumn2007. pdf)PDF (286 KiB), Mount Diablo Interpretive Association. Retrieved on 2008-10-15.
[5] 1970 distribution of yellow starthistle in the U.S. (http:/ / wric. ucdavis. edu/ yst/ images/ none/ nc4. JPG), a map from UCD's Yellow Starthistle Information website [6] Theel Heather J., Dibble Eric D., Madsen John D. (1948). "Differential influence of a monotypic and diverse native aquatic plant bed on a
macroinvertebrate assemblage; an experimental implication of exotic plant induced habitat" (http:/ / cat. inist. fr/ ?aModele=afficheN& cpsidt=20189959). Cat.Inist and Springer, Dordrecht, PAYS-BAS. . Retrieved 2011-04-17.
External links Human habitats 12
What is happening to our planet
Ecology
Ecology
The scientific discipline of ecology addresses the full scale of life, from tiny bacteria to processes that span the entire planet. Ecologists study many diverse and complex relations among species, such as predation and pollination. The diversity of life is organized into different habitats, from terrestrial (middle) to aquatic ecosystems.
Ecology (from Greek: οἶκος, "house"; -λογία, "study of") is the scientific study of the relations that living organisms have with respect to each other and their natural environment. Variables of interest to ecologists include the composition, distribution, amount (biomass), number, and changing states of organisms within and among ecosystems. Ecosystems are hierarchical systems that are organized into a graded series of regularly interacting and semi-independent parts (e.g., species) that aggregate into higher orders of complex integrated wholes (e.g., communities). Ecosystems are sustained by the biodiversity within them. Biodiversity is the full-scale of life and its processes, including genes, species and ecosystems forming lineages that integrate into a complex and regenerative spatial arrangement of types, forms, and interactions. Ecosystems create biophysical feedback mechanisms between living (biotic) and nonliving (abiotic) components of the planet. These feedback loops regulate and sustain local communities, continental climate systems, and global biogeochemical cycles. Ecology is an interdisciplinary branch of biology, the study of life. The word "ecology" ("Ökologie") was coined in 1866 by the German scientist Ernst Haeckel (1834–1919). Ancient philosophers of Greece, including Hippocrates and Aristotle, were among the earliest to record observations and notes on the natural history of plants and animals. Modern ecology branched out of natural history and matured into a more rigorous science in the late 19th century. Charles Darwin's evolutionary treatise including the concept of adaptation, as it was introduced in 1859, is a pivotal Ecology 13
cornerstone in modern ecological theory. Ecology is not synonymous with environment, environmentalism, natural history or environmental science. It is closely related to physiology, evolutionary biology, genetics and ethology. An understanding of how biodiversity affects ecological function is an important focus area in ecological studies. Ecologists seek to explain: • Life processes and adaptations • Distribution and abundance of organisms • The movement of materials and energy through living communities • The successional development of ecosystems, and • The abundance and distribution of biodiversity in context of the environment. Ecology is a human science as well. There are many practical applications of ecology in conservation biology, wetland management, natural resource management (agriculture, forestry, fisheries), city planning (urban ecology), community health, economics, basic and applied science and human social interaction (human ecology). Ecosystems sustain every life-supporting function on the planet, including climate regulation, water filtration, soil formation (pedogenesis), food, fibers, medicines, erosion control, and many other natural features of scientific, historical or spiritual value.[1][2][3]
Integrative levels, scope, and scale of organization
The scope of ecology covers a wide array of interacting levels of organization spanning micro-level (e.g., cells) to planetary scale (e.g., ecosphere) phenomena. Ecosystems, for example, contain populations of Ecosystems regenerate after a disturbance such as fire, forming mosaics of different age individuals that aggregate into distinct groups structured across a landscape. Pictured are different seral stages in forested ecological communities. It can take ecosystems starting from pioneers colonizing a disturbed site and maturing in successional stages leading to old-growth forests. thousands of years for ecological processes to mature through and until the final successional stages of a forest. The area of an ecosystem can vary greatly from tiny to vast. A single tree is of little consequence to the classification of a forest ecosystem, but critically relevant to organisms living in and on it.[4] Several generations of an aphid population can exist over the lifespan of a single leaf. Each of those aphids, in turn, support diverse bacterial communities.[5] The nature of connections in ecological communities cannot be explained by knowing the details of each species in isolation, because the emergent pattern is neither revealed nor predicted until the ecosystem is studied as an integrated whole. Some ecological principles, however, do exhibit collective properties where the sum of the components explain the properties of the whole, such as birth rates of a population being equal to the sum of individual births over a designated time frame.[6] Ecology 14
Hierarchical ecology System behaviours must first be arrayed into levels of organization. Behaviors corresponding to higher levels occur at slow rates. Conversely, lower organizational levels exhibit rapid rates. For example, individual tree leaves respond rapidly to momentary changes in light intensity, CO concentration, and the like. The growth of the tree responds more slowly and integrates these 2 [7] short-term changes. :76 The scale of ecological dynamics can operate like a closed island with respect to local site variables, such as aphids migrating on a tree, while at the same time remain open with regard to broader scale influences, such as atmosphere or climate. Hence, ecologists have devised means of hierarchically classifying ecosystems by analyzing data collected from finer scale units, such as vegetation associations, climate, and soil types, and integrate this information to identify larger emergent patterns of uniform organization and processes that operate on local to regional, landscape, and chronological scales. To structure the study of ecology into a manageable framework of understanding, the biological world is conceptually organized as a nested hierarchy of organization, ranging in scale from genes, to cells, to tissues, to organs, to organisms, to species and up to the level of the biosphere.[8] Together these hierarchical scales of life form a panarchy[9][10] and they exhibit non-linear behaviours; "nonlinearity refers to the fact that effect and cause are disproportionate, so that small changes in critical variables, such as the numbers of nitrogen fixers, can lead to disproportionate, perhaps irreversible, changes in the system properties."[11]:14
Biodiversity Biodiversity is the variety of life and its processes. It includes the variety of living organisms, the genetic differences among them, the communities and ecosystems in which they occur, and the ecological and evolutionary processes that keep them functioning, yet [12] ever changing and adapting. :5 Biodiversity (an abbreviation of biological diversity) describes the diversity of life from genes to ecosystems and spans every level of biological organization. Biodiversity means different things to different people and there are many ways to index, measure, characterize, and represent its complex organization.[13][14] Biodiversity includes species diversity, ecosystem diversity, genetic diversity and the complex processes operating at and among these respective levels.[14][15][16] Biodiversity plays an important role in ecological health as much as it does for human health.[17][18] Preventing or prioritizing species extinctions is one way to preserve biodiversity, but populations, the genetic diversity within them and ecological processes, such as migration, are being threatened on global scales and disappearing rapidly as well. Conservation priorities and management techniques require different approaches and considerations to address the full ecological scope of biodiversity. Populations and species migration, for example, are more sensitive indicators of ecosystem services that sustain and contribute natural capital toward the well-being of humanity.[19][20][21][22] An understanding of biodiversity has practical application for ecosystem-based conservation planners as they make ecologically responsible decisions in management recommendations to consultant firms, governments and industry.[23]
Habitat The habitat of a species describes the environment over which a species is known to occur and the type of community that is formed as a result.[24] More specifically, "habitats can be defined as regions in environmental space that are composed of multiple dimensions, each representing a biotic or abiotic environmental variable; that is, any component or characteristic of the environment related directly (e.g. forage biomass and quality) or indirectly (e.g. elevation) to the use of a location by the animal."[25]:745 For example, the habitat might refer to an aquatic or terrestrial environment that can be further categorized as montane or alpine ecosystems. Habitat shifts provide important evidence of competition in nature where one population changes relative to the habitats that most other individuals of the species occupy. One population of a species of tropical lizards (Tropidurus hispidus), for example, has a flattened body relative to the main populations that live in open savanna. The population that lives in an Ecology 15
isolated rock outcrop hides in crevasses where its flattened body may improve its performance. Habitat shifts also occur in the developmental life history of amphibians and many insects that transition from aquatic to terrestrial habitats. Biotope and habitat are sometimes used interchangeably, but the former applies to a communities environment, whereas the latter applies to a species' environment.[24][26][27]
Biodiversity of a coral reef. Corals adapt and modify their environment by forming calcium carbonate skeletons that provide growing conditions for future generations and form habitat [28] for many other species. Ecology 16
Niche
There are many definitions of the niche dating back to 1917,[31] but G. Evelyn Hutchinson made conceptual advances in 1957[32][33] and introduced a widely accepted definition: "the set of biotic and abiotic conditions which a species is able to persist and maintain stable population sizes."[31]:519 The ecological niche is a central concept in the ecology of organisms and is sub-divided into the fundamental and the realized niche. The fundamental niche is the set of environmental conditions under which a species is able to persist. The realized niche is the set of environmental plus ecological conditions under which a species persists.[31][33][34] The Hutchisonian niche is defined more technically as an "Euclidean hyperspace whose dimensions are defined as environmental variables and whose size is a function of the number of values that the environmental values may assume for which an organism has positive fitness."[35]:71
Biogeographical patterns and range distributions are explained or predicted through knowledge and understanding of a species traits and [36] niche requirements. Species have functional traits that are uniquely Termite mounds with varied heights of chimneys adapted to the ecological niche. A trait is a measurable property, regulate gas exchange, temperature and other phenotype, or characteristic of an organism that influences its environmental parameters that are needed to sustain the internal physiology of the entire performance. Genes play an important role in the development and [29][30] colony. expression of traits.[37] Resident species evolve traits that are fitted to their local environment. This tends to afford them a competitive advantage and discourages similarly adapted species from having an overlapping geographic range. The competitive exclusion principle suggests that two species cannot coexist indefinitely by living off the same limiting resource. When similarly adapted species are found to overlap geographically, closer inspection reveals subtle ecological differences in their habitat or dietary requirements.[38] Some models and empirical studies, however, suggest that disturbances can stabilize the coevolution and shared niche occupancy of similar species inhabiting species rich communities.[39] The habitat plus the niche is called the ecotope, which is defined as the full range of environmental and biological variables affecting an entire species.[24]
Niche construction Organisms are subject to environmental pressures, but they are also modifiers of their habitats. The regulatory feedback between organisms and their environment can modify conditions from local (e.g., a beaver pond) to global scales (e.g., Gaia), over time and even after death, such as decaying logs or silica skeleton deposits from marine organisms.[40] The process and concept of ecosystem engineering has also been called niche construction. Ecosystem engineers are defined as: "...organisms that directly or indirectly modulate the availability of resources to other species, by causing physical state changes in biotic or abiotic materials. In so doing they modify, maintain and create habitats."[41]:373 The ecosystem engineering concept has stimulated a new appreciation for the degree of influence that organisms have on the ecosystem and evolutionary process. The terms niche construction are more often used in reference to the under appreciated feedback mechanism of natural selection imparting forces on the abiotic niche.[29][42] An example of natural selection through ecosystem engineering occurs in the nests of social insects, including ants, bees, wasps, and termites. There is an emergent homeostasis or homeorhesis in the structure of the nest that regulates, maintains and defends the physiology of the entire colony. Termite mounds, for example, maintain a constant internal temperature through the design of air-conditioning chimneys. The structure of the nests themselves are Ecology 17
subject to the forces of natural selection. Moreover, the nest can survive over successive generations, which means that ancestors inherit both genetic material and a legacy niche that was constructed before their time.[6][29][30][43]
Biome Biomes are larger units of organization that categorize regions of the Earth's ecosystems mainly according to the structure and composition of vegetation.[44] Different researchers have applied different methods to define continental boundaries of biomes dominated by different functional types of vegetative communities that are limited in distribution by climate, precipitation, weather and other environmental variables. Examples of biome names include: tropical rainforest, temperate broadleaf and mixed forests, temperate deciduous forest, taiga, tundra, hot desert, and polar desert.[45] Other researchers have recently started to categorize other types of biomes, such as the human and oceanic microbiomes. To a microbe, the human body is a habitat and a landscape.[46] The microbiome has been largely discovered through advances in molecular genetics that have revealed a hidden richness of microbial diversity on the planet. The oceanic microbiome plays a significant role in the ecological biogeochemistry of the planet's oceans.[47]
Biosphere Ecological theory has been used to explain self-emergent regulatory phenomena at the planetary scale. The largest scale of ecological organization is the biosphere: the total sum of ecosystems on the planet. Ecological relationships regulate the flux of energy, nutrients, and climate all the way up to the planetary scale. For example, the dynamic history of the planetary CO and O composition of the atmosphere has been largely determined by the biogenic flux 2 2 of gases coming from respiration and photosynthesis, with levels fluctuating over time and in relation to the ecology and evolution of plants and animals.[48] When sub-component parts are organized into a whole there are oftentimes emergent properties that describe the nature of the system. The Gaia hypothesis is an example of holism applied in ecological theory.[49] The ecology of the planet acts as a single regulatory or holistic unit called Gaia. The Gaia hypothesis states that there is an emergent feedback loop generated by the metabolism of living organisms that maintains the temperature of the Earth and atmospheric conditions within a narrow self-regulating range of tolerance.[50]
Population ecology The population is the unit of analysis in population ecology. A population consists of individuals of the same species that live, interact and migrate through the same niche and habitat.[51] A primary law of population ecology is the Malthusian growth model.[52] This law states that: "...a population will grow (or decline) exponentially as long as the environment experienced by all individuals in the population remains constant."[52]:18 This Malthusian premise provides the basis for formulating predictive theories and tests that follow. Simplified population models usually start with four variables including death, birth, immigration, and emigration. Mathematical models are used to calculate changes in population demographics using a null model. A null model is used as a null hypothesis for statistical testing. The null hypothesis states that random processes create observed patterns. Alternatively the patterns differ significantly from the random model and require further explanation. Models can be mathematically complex where "...several competing hypotheses are simultaneously confronted with the data."[53] An example of an introductory population model describes a closed population, such as on an island, where immigration and emigration does not take place. In these island models the rate of population change is described by: Ecology 18
where N is the total number of individuals in the population, B is the number of births, D is the number of deaths, b and d are the per capita rates of birth and death respectively, and r is the per capita rate of population change. This formula can be read out as the rate of change in the population (dN/dT) is equal to births minus deaths (B – D).[52][54] Using these modelling techniques, Malthus' population principle of growth was later transformed into a model known as the logistic equation:
where N is the number of individuals measured as biomass density, a is the maximum per-capita rate of change, and K is the carrying capacity of the population. The formula can be read as follows: the rate of change in the population (dN/dT) is equal to growth (aN) that is limited by carrying capacity (1 – N/K). The discipline of population ecology builds upon these introductory models to further understand demographic processes in real study populations and conduct statistical tests. The field of population ecology often uses data on life history and matrix algebra to develop projection matrices on fecundity and survivorship. This information is used for managing wildlife stocks and setting harvest quotas.[54][55]
Metapopulations and migration Populations are also studied and modeled according to the metapopulation concept. The metapopulation concept was introduced in 1969:[56] "as a population of populations which go extinct locally and recolonize."[57]:105 Metapopulation ecology is another statistical approach that is often used in conservation research.[58] Metapopulation research simplifies the landscape into patches of varying levels of quality.[59] Metapopulations are linked by the migratory behaviours of organisms. Animal migration is set apart from other kinds of movement because it involves the seasonal departure and return of individuals from one habitat to another.[60] Migration is also a population level phenomenon, such as the migration routes followed by plants as they occupied northern post-glacial environments. Plant ecologists rely on pollen records that accumulate and stratify in wetlands to reconstruct the timing of plant migration and dispersal relative to historic and contemporary climates. These migration routes involved an expansion of the range as plant populations expanded from one area to another. There is a larger taxonomy of movement, such as commuting, foraging, territorial behaviour, stasis, and ranging. Dispersal is usually distinguished from migration because it involves the one way permanent movement of individuals from their birth population into another population.[61][] In metapopulation terminology there are emigrants (individuals that leave a patch), immigrants (individuals that move into a patch) and sites are classed either as sources or sinks. A site is a generic term that refers to places where ecologists sample populations, such as ponds or defined sampling areas in a forest. Source patches are productive sites that generate a seasonal supply of juveniles that migrate to other patch locations. Sink patches are unproductive sites that only receive migrants and will go extinct unless rescued by an adjacent source patch or environmental conditions become more favorable. Metapopulation models examine patch dynamics over time to answer questions about spatial and demographic ecology. The ecology of metapopulations is a dynamic process of extinction and colonization. Small patches of lower quality (i.e., sinks) are maintained or rescued by a seasonal influx of new immigrants. A dynamic metapopulation structure evolves from year to year, where some patches are sinks in dry years and become sources when conditions are more favorable. Ecologists use a mixture of computer models and field studies to explain metapopulation structure.[62][63] Ecology 19
Community ecology
Community ecology examines how interactions among species and their environment affect the abundance, distribution and diversity of species within communities. [64] Johnson & Stinchcomb :250 Community ecology is the study of the interactions among a collection of interdependent species that cohabitate the same geographic area. An example of a study in community ecology might measure primary production in a wetland in relation to decomposition and consumption
rates. This requires an understanding of the community connections Interspecific interactions such as predation are a between plants (i.e., primary producers) and the decomposers (e.g., key aspect of community ecology. fungi and bacteria).[65] or the analysis of predator-prey dynamics affecting amphibian biomass.[66] Food webs and trophic levels are two widely employed conceptual models used to explain the linkages among species.[67][68]
Ecosystem ecology These ecosystems, as we may call them, are of the most various kinds and sizes. They form one category of the multitudinous physical systems of the universe, which range from the universe as a whole down to the atom. [69] Tansley :299 The concept of the ecosystem was fully synthesized in 1935 to describe habitats within biomes that form an integrated whole and a dynamically responsive system having both physical and biological complexes. However, the underlying concept can be traced back to 1864 in the published work of George Perkins Marsh ("Man and Nature").[70][71] Within an ecosystem there are inseparable ties that link organisms to the physical and biological components of their environment to which they are adapted.[69] Ecosystems are complex adaptive systems where Figure 1. A riparian forest in the White Mountains, New Hampshire (USA), the interaction of life processes form an example of ecosystem ecology self-organizing patterns across different scales of time and space.[72] terrestrial, freshwater, atmospheric, and marine ecosystems very broadly cover the major types. Differences stem from the nature of the unique physical environments that shapes the biodiversity within each. A more recent addition to ecosystem ecology are the novel technoecosystems of the anthropocene.[6]
Food webs A food web is the archetypal ecological network. Plants capture and convert solar energy into the biomolecular bonds of simple sugars during photosynthesis. This food energy is transferred through a series of organisms starting with those that feed on plants and are themselves consumed. The simplified linear feeding pathways that move from a basal trophic species to a top consumer is called the food chain. The larger interlocking pattern of food chains in an ecological community creates a complex food web. Food webs are a type of concept map or a heuristic device that is used illustrate and study pathways of energy and material flows.[7][73][74] Ecology 20
Food webs are often limited relative to the real world. Complete empirical measurements are generally restricted to a specific habitat, such as a cave or a pond. Principles gleaned from food web microcosm studies are used to extrapolate smaller dynamic concepts to larger systems.[75] Feeding relations require extensive investigations into the gut contents of organisms, which can be very difficult to decipher, or (more recently) stable isotopes can be used to trace the flow of nutrient diets and energy through a food web.[76] While food webs often give an incomplete measure of ecosystems, they are nonetheless a valuable [77] Generalized food web of waterbirds from tool in understanding community ecosystems. Chesapeake Bay Food-webs exhibit principals of ecological emergence through the nature of trophic entanglement, where some species have many weak feeding links (e.g., omnivores) while some are more specialized with fewer stronger feeding links (e.g., primary predators). Theoretical and empirical studies identify non-random emergent patterns of few strong and many weak linkages that serve to explain how ecological communities remain stable over time.[78] Food-webs have compartments, where the many strong interactions create subgroups among some members in a community and the few weak interactions occur between these subgroups. These compartments increase the stability of food-webs.[79] As plants grow, they accumulate carbohydrates and are eaten by grazing herbivores. Step by step lines or relations are drawn until a web of life is illustrated.[74][80][81][82]
Trophic levels
The Greek root of the word troph, τροφή, trophē, means food or feeding. Links in food-webs primarily connect feeding relations or trophism among species. Biodiversity within ecosystems can be organized into vertical and horizontal dimensions. The vertical dimension represents feeding relations that become further A trophic pyramid (a) and a food-web (b) illustrating ecological relationships among removed from the base of the food creatures that are typical of a northern Boreal terrestrial ecosystem. The trophic pyramid roughly represents the biomass (usually measured as total dry-weight) at each level. chain up toward top predators. A Plants generally have the greatest biomass. Names of trophic categories are shown to the trophic level is defined as "a group of right of the pyramid. Some ecosystems, such as many wetlands, do not organize as a strict organisms acquiring a considerable pyramid, because aquatic plants are not as productive as long-lived terrestrial plants such majority of its energy from the as trees. Ecological trophic pyramids are typically one of three kinds: 1) pyramid of [6] numbers, 2) pyramid of biomass, or 3) pyramid of energy. adjacent level nearer the abiotic source."[83]:383 The horizontal dimension represents the abundance or biomass at each level.[84] When the relative abundance or biomass of each functional feeding group is stacked into their respective trophic levels they naturally sort into a 'pyramid of numbers'.[85]
Functional groups are broadly categorized as autotrophs (or primary producers), heterotrophs (or consumers), and detrivores (or decomposers). Autotrophs are organisms that can produce their own food (production is greater than respiration) and are usually plants or cyanobacteria that are capable of photosynthesis but can also be other organisms such as bacteria near ocean vents that are capable of chemosynthesis. Heterotrophs are organisms that must feed on others for nourishment and energy (respiration exceeds production).[6] Heterotrophs can be further Ecology 21
sub-divided into different functional groups, including: primary consumers (strict herbivores), secondary consumers (carnivorous predators that feed exclusively on herbivores) and tertiary consumers (predators that feed on a mix of herbivores and predators).[86] Omnivores do not fit neatly into a functional category because they eat both plant and animal tissues. It has been suggested that omnivores have a greater functional influence as predators because relative to herbivores they are comparatively inefficient at grazing.[87] Trophic levels are part of the holistic or complex systems view of ecosystems.[88][89] Each trophic level contains unrelated species that grouped together because they share common ecological functions. Grouping functionally similar species into a trophic system gives a macroscopic image of the larger functional design.[90] While the notion of trophic levels provides insight into energy flow and top-down control within food webs, it is troubled by the prevalence of omnivory in real ecosystems. This has lead some ecologists to "reiterate that the notion that species clearly aggregate into discrete, homogeneous trophic levels is fiction."[91]:815 Nonetheless, recent studies have shown that real trophic levels do exist, but "above the herbivore trophic level, food webs are better characterized as a tangled web of omnivores."[92]:612
Keystone species A keystone species is a species that is disproportionately connected to more species in the food-web. Keystone species have lower levels of biomass in the trophic pyramid relative to the importance of their role. The many connections that a keystone species holds means that it maintains the organization and structure of entire communities. The loss of a keystone species results in a range of dramatic cascading effects that alters trophic dynamics, other food-web connections and can cause the extinction of other species in the community.[93][94] Sea otters (Enhydra lutris) are commonly cited as an example of a keystone species because they limit the density of sea urchins that feed on kelp. If sea otters are removed from the system, the urchins graze until the kelp beds disappear and this has a dramatic effect on community structure.[95] Hunting of sea otters, for example, is thought to have indirectly led to the extinction of the Steller's Sea Cow (Hydrodamalis gigas).[96] While the keystone species concept has been used extensively as a conservation tool, it has been criticized for being poorly defined from an operational stance. It is very difficult to experimentally determine in each different ecosystem what species may hold a keystone role. Furthermore, food-web theory suggests that keystone species may not be all that common. It is therefore unclear how generally the keystone species model can be applied.[95][97]
Soils Soil is the living top layer of mineral and organic dirt that covers the surface of the planet, it is the chief organizing centre of most ecosystem functions, and it is of critical importance in agricultural science and ecology. The decomposition of dead organic matter, such as leaves falling on the forest floor, turns into soils containing minerals and nutrients that feed into plant production. The total sum of the planet's soil ecosystems is called the pedosphere where a very large proportion of the Earth's biodiversity sorts into other trophic levels. Invertebrates that feed and shred larger leaves, for example, create smaller bits for smaller organisms in the feeding chain. Collectively, these are the detrivores that regulate soil formation. [98][99][100][101] Tree roots, fungi, bacteria, worms, ants, beetles, centipedes, spiders, mammals, birds, reptiles, amphibians and other less familiar creatures all work to create the trophic web of life in soil ecosystems. As organisms feed and migrate through soils they physically displace materials, which is an important ecological process called bioturbation. Bioturbation helps to aerate the soils, thus stimulating hetertrophic growth and production. Biomass of soil microorganisms are influenced by and feed back into the trophic dynamics of the exposed solar surface ecology. Paleoecological studies of soils places the origin for bioturbation to a time before the Cambrian period. Other events, such as the evolution of trees and amphibians moving into land in the Devonian period played a significant role in the development of the ecological trophism in soils.[66][101][102] Ecology 22
Ecological complexity Complexity is easily understood as a large computational effort needed to piece together numerous interacting parts exceeding the iterative memory capacity of the human mind. Global patterns of biological diversity are complex. This biocomplexity stems from the interplay among ecological processes that operate and influence patterns at different scales that grade into each other, such as transitional areas or ecotones spanning landscapes.[103] Complexity stems from the interplay among levels of biological organization as energy and matter is integrated into larger units that superimpose onto the smaller parts. "What were wholes on one level become parts on a higher one."[104]:209 Small scale patterns do not necessarily explain large scale phenomena, otherwise captured in the expression (coined by Aristotle) 'the sum is greater than the parts'.[105][106] "Complexity in ecology is of at least six distinct types: spatial, temporal, structural, process, behavioral, and geometric."[107]:3 Out of these principles, ecologists have identified emergent and self-organizing phenomena that operate at different environmental scales of influence, ranging from molecular to planetary, and these require different sets of scientific explanation at each integrative level.[50][108] Ecological complexity relates to the dynamic resilience of ecosystems that transition to multiple shifting steady-states directed by random fluctuations of history.[9][109] Long-term ecological studies provide important track records to better understand the complexity and resilience of ecosystems over longer temporal and broader spatial scales. The International Long Term Ecological Network[110] manages and exchanges scientific information among research sites. The longest experiment in existence is the Park Grass Experiment that was initiated in 1856.[111] Another example includes the Hubbard Brook study in operation since 1960.[112]
Holism The biological organization of life self-organizes into layers of emergent whole systems that function according to nonreducible properties called holism. This means that higher order patterns of a whole functional system, such as an ecosystem, cannot be predicted or understood by a simple summation of the parts. "New properties emerge because the components interact, not because the basic nature of the components is changed."[6]:8 Ecological studies are necessarily holistic as opposed to reductionistic.[108][113] Holism has three scientific meanings or uses that identify with: 1) the mechanistic complexity of ecosystems, 2) the practical description of patterns in quantitative reductionist terms where correlations may be identified but nothing is understood about the causal relations without reference to the whole system, which leads to 3) a metaphysical hierarchy whereby the causal relations of larger systems are understood without reference to the smaller parts. An example of the metaphysical aspect to holism is identified in the trend of increased exterior thickness in shells of different species. The reason for a thickness increase can be understood through reference to principals of natural selection via predation without need to reference or understand the biomolecular properties of the exterior shells.[114]
Relation to evolution Ecology and evolution are considered sister disciplines of the life sciences. Natural selection, life history, development, adaptation, populations, and inheritance are examples of concepts that thread equally into ecological and evolutionary theory. Morphological, behavioral and/or genetic traits, for example, can be mapped onto evolutionary trees to study the historical development of a species in relation to their functions and roles in different ecological circumstances. In this framework, the analytical tools of ecologists and evolutionists overlap as they organize, classify and investigate life through common systematic principals, such as phylogenetics or the Linnaean system of taxonomy.[115] The two disciplines often appear together, such as in the title of the journal Trends in Ecology and Evolution.[116] There is no sharp boundary separating ecology from evolution and they differ more in their areas of applied focus. Both disciplines discover and explain emergent and unique properties and processes operating across different spatial or temporal scales of organization.[50][117][118] While the boundary between ecology and evolution is not always clear, it is understood that ecologists study the abiotic and biotic factors that Ecology 23
influence the evolutionary process.[119][120]
Behavioral ecology
All organisms are motile to some extent. Even plants express complex behavior, including memory and communication.[122] Behavioral ecology is the study of an organism's behavior in its environment and its ecological and evolutionary implications. Ethology is the study of observable movement or behavior in animals. This could include investigations of motile sperm of plants, Social display and color variation in differently adapted species of chameleons (Bradypodion spp.). Chameleons change their skin color to match their background as a mobile phytoplankton, zooplankton behavioral defense mechanism and also use color to communicate with other members swimming toward the female egg, the of their species, such as dominant (left) versus submissive (right) patterns shown in the [121] cultivation of fungi by weevils, the three species (A-C) above. mating dance of a salamander, or social gatherings of amoeba.[123][124][125][126][127]
Adaptation is the central unifying concept in behavioral ecology.[128] Behaviors can be recorded as traits and inherited in much the same way that eye and hair color can. Behaviors evolve and become adapted to the ecosystem because they are subject to the forces of natural selection.[15] Hence, behaviors can be adaptive, meaning that they evolve functional utilities that increases reproductive success for the individuals that inherit such traits.[129] This is also the technical definition for fitness in biology, which is a measure of reproductive success over successive generations.[15]
Predator-prey interactions are an introductory concept into food-web studies as well as behavioral ecology.[130] Prey species can exhibit different kinds of behavioral adaptations to predators, such as avoid, flee or defend. Many prey species are faced with multiple predators that differ in the degree of danger posed. To be adapted to their environment and face predatory threats, organisms must balance their energy budgets as they invest in different aspects of their life history, such as growth, feeding, mating, socializing, or modifying their habitat. Hypotheses posited in behavioral ecology are generally based on adaptive principals of conservation, optimization or efficiency.[34][119][131] For example, "The threat-sensitive predator avoidance hypothesis predicts that prey should assess the degree of threat posed by different predators and match their behavior according to current levels of risk."[132] "The optimal flight initiation distance occurs where expected postencounter fitness is maximized, which depends on the prey's initial fitness, benefits obtainable by not fleeing, energetic escape costs, and expected fitness loss due to predation risk."[133] Ecology 24
Elaborate sexual displays and posturing are encountered in the behavioral ecology of animals. The birds of paradise, for example, display elaborate ornaments and song during courtship. These displays serve a dual purpose of signaling healthy or well-adapted individuals and desirable genes. The elaborate displays are driven by sexual selection as an advertisement of quality of traits among male suitors.[135]
Social ecology
Social ecological behaviors are notable in the social insects, slime moulds, social spiders, human society, and naked mole rats where eusocialism has evolved. Social behaviors include reciprocally beneficial behaviors among kin and nest mates.[15][125][136] Social behaviors evolve from kin and group selection. Kin selection explains altruism through genetic relationships, whereby an altruistic behavior leading to death is rewarded by the survival of genetic copies distributed among surviving relatives. The social insects, including Symbiosis: Leafhoppers (Eurymela fenestrata) ants, bees and wasps are most famously studied for this type of are protected by ants (Iridomyrmex purpureus) in a symbiotic relationship. The ants protect the relationship because the male drones are clones that share the same leafhoppers from predators and in return the [15] genetic make-up as every other male in the colony. In contrast, leafhoppers feeding on plants exude honeydew group selectionists find examples of altruism among non-genetic from their anus that provides energy and nutrients [134] relatives and explain this through selection acting on the group, to tending ants. whereby it becomes selectively advantageous for groups if their members express altruistic behaviors to one another. Groups that are predominantly altruists beat groups that are predominantly selfish.[15][137]
Coevolution
Ecological interactions can be divided into host and associate relationships. A host is any entity that harbors another that is called the associate.[138] Host and associate relationships among species that are mutually or reciprocally beneficial are called mutualisms. If the host and associate are physically connected, the relationship is called symbiosis. Approximately 60% of all plants, for example, have a symbiotic relationship with arbuscular mycorrhizal fungi. Symbiotic plants and fungi exchange carbohydrates for mineral nutrients.[139] Symbiosis differs from indirect mutualisms where the organisms live apart. For example, tropical rainforests regulate the Earth's atmosphere. Trees living in the equatorial regions of the planet supply oxygen into the atmosphere that sustains species living in distant polar regions of the planet. This relationship is called commensalism because many other host species receive the benefits of clean air at no cost or harm to the associate tree species supplying the oxygen.[140] The host and associate relationship is called parasitism if one species benefits while the other suffers. Competition among species or among members of the same species is defined as reciprocal antagonism, such as grasses competing for growth space.[141] Ecology 25
Popular ecological study systems for mutualism include, fungus-growing ants employing agricultural symbiosis, bacteria living in the guts of insects and other organisms, the fig wasp and yucca moth pollination complex, lichens with fungi and photosynthetic algae, and corals with photosynthetic algae.[142][143] Nevertheless, many organisms exploit host rewards without reciprocating and thus have been branded with a myriad of not-very-flattering names such as 'cheaters', 'exploiters', 'robbers', and 'thieves'. Although cheaters impose several host cots (e.g., via damage to their reproductive organs or propagules, denying the services of a beneficial partner), their net effect on host fitness is not necessarily negative and, thus, becomes difficult to forecast.[144][145]
Parasites: A harvestman arachnid is parasitized by mites. This is parasitism Biogeography because the harvestman is being consumed as its juices are slowly sucked out while the mites gain all the benefits traveling on and feeding off of their host. The word biogeography is an amalgamation of biology and geography. Biogeography is the comparative study of the geographic distribution of organisms and the corresponding evolution of their traits in space and time.[146] The Journal of Biogeography was established in 1974.[147] Biogeography and ecology share many of their disciplinary roots. For example, the theory of island biogeography, published by the mathematician Robert MacArthur and ecologist Edward O. Wilson in 1967[148] is considered one of the fundamentals of ecological theory.[149]
Biogeography has a long history in the natural sciences where questions arise concerning the spatial distribution of plants and animals. Ecology and evolution provide the explanatory context for biogeographical studies.[146] Biogeographical patterns result from ecological processes that influence range distributions, such as migration and dispersal.[149] and from historical processes that split populations or species into different areas.[150] The biogeographic processes that result in the natural splitting of species explains much of the modern distribution of the Earth's biota. The splitting of lineages in a species is called vicariance biogeography and it is a sub-discipline of biogeography.[150][151][152] There are also practical applications in the field of biogeography concerning ecological systems and processes. For example, the range and distribution of biodiversity and invasive species responding to climate change is a serious concern and active area of research in context of global warming.[20][153]
r/K-Selection theory A population ecology concept (introduced in MacArthur and Wilson's (1967) book, The Theory of Island Biogeography) is r/K selection theory, one of the first predictive models in ecology used to explain life-history evolution. The premise behind the r/K selection model is that natural selection pressures change according to population density. For example, when an island is first colonized, density of individuals is low. The initial increase in population size is not limited by competition, leaving an abundance of available resources for rapid population growth. These early phases of population growth experience density-independent forces of natural selection, which is called r-selection. As the population becomes more crowded, it approaches the island's carrying capacity, thus Ecology 26
forcing individuals to compete more heavily for fewer available resources. Under crowded conditions the population experiences density-dependent forces of natural selection, called K-selection.[154] In the r/K-selection model, the first variable r is the intrinsic rate of natural increase in population size and the second variable K is the carrying capacity of a population.[34] Different species evolve different life-history strategies spanning a continuum between these two selective forces. An r-selected species is one that has high birth rates, low levels of parental investment, and high rates of mortality before individuals reach maturity. Evolution favors high rates of fecundity in r-selected species. Many kinds of insects and invasive species exhibit r-selected characteristics. In contrast, a K-selected species has low rates of fecundity, high levels of parental investment in the young, and low rates of mortality as individuals mature. Humans and elephants are examples of species exhibiting K-selected characteristics, including longevity and efficiency in the conversion of more resources into fewer offspring.[148][155]
Molecular ecology The important relationship between ecology and genetic inheritance predates modern techniques for molecular analysis. Molecular ecological research became more feasible with the development of rapid and accessible genetic technologies, such as the polymerase chain reaction (PCR). The rise of molecular technologies and influx of research questions into this new ecological field resulted in the publication Molecular Ecology in 1992.[156] Molecular ecology uses various analytical techniques to study genes in an evolutionary and ecological context. In 1994, John Avise also played a leading role in this area of science with the publication of his book, Molecular Markers, Natural History and Evolution.[157] Newer technologies opened a wave of genetic analysis into organisms once difficult to study from an ecological or evolutionary standpoint, such as bacteria, fungi and nematodes. Molecular ecology engendered a new research paradigm for investigating ecological questions considered otherwise intractable. Molecular investigations revealed previously obscured details in the tiny intricacies of nature and improved resolution into probing questions about behavioral and biogeographical ecology.[157] For example, molecular ecology revealed promiscuous sexual behavior and multiple male partners in tree swallows previously thought to be socially monogamous.[158] In a biogeographical context, the marriage between genetics, ecology and evolution resulted in a new sub-discipline called phylogeography.[159]
Human ecology Human ecology is the interdisciplinary investigation into the ecology of our species. "Human ecology may be defined: (1) from a bio-ecological standpoint as the study of man as the ecological dominant in plant and animal communities and systems; (2) from a bio-ecological standpoint as simply another animal affecting and being affected by his physical environment; and (3) as a human being, somehow different from animal life in general, interacting with physical and modified environments in a distinctive and creative way. A truly interdisciplinary human ecology will most likely address itself to all three."[160] The term human ecology was formally introduced in 1921, but many sociologists, geographers, psychologists, and other disciplines were interested in human relations to natural systems centuries prior, especially in the late 19th century.[160][161] Some authors have identified a new unifying science in coupled human and natural systems that builds upon, but moves beyond the field human ecology.[162] Ecology is as much a biological science as it is a human science.[6] "Perhaps the most important implication involves our view of human society. Homo sapiens is not an external disturbance, it is a keystone species within the system. In the long term, it may not be the magnitude of extracted goods and services that will determine sustainability. It may well be our disruption of ecological recovery and stability mechanisms that determines system collapse."[71]:3282 Ecology 27
Relation to the environment The environment is dynamically interlinked, imposed upon and constrains organisms at any time throughout their life cycle.[163] Like the term ecology, environment has different conceptual meanings and to many these terms also overlap with the concept of nature. Environment "...includes the physical world, the social world of human relations and the built world of human creation."[164]:62 The environment in ecosystems includes both physical parameters and biotic attributes. The physical environment is external to the level of biological organization under investigation, including abiotic factors such as temperature, radiation, light, chemistry, climate and geology. The biotic environment includes genes, cells, organisms, members of the same species (conspecifics) and other species that share a habitat.[165] The laws of thermodynamics applies to ecology by means of its physical state. Armed with an understanding of metabolic and thermodynamic principles a complete accounting of energy and material flow can be traced through an ecosystem.[166] Environmental and ecological relations are studied through reference to conceptually manageable and isolated parts. Once the effective environmental components are understood they conceptually link back together as a holocoenotic[167] system. In other words, the organism and the environment form a dynamic whole (or umwelt).[168]:252 Change in one ecological or environmental factor can concurrently affect the dynamic state of an entire ecosystem.[169][170]
Disturbance and resilience Ecosystems are regularly confronted with natural environmental variations and disturbances over time and geographic space. A disturbance is any process that removes living biomass from a community, such as a fire, flood, drought, or predation.[171] Fluctuations causing disturbance occur over vastly different ranges in terms of magnitudes as well as distances and time periods.[172] Disturbances, such as fire, are both cause and product of natural fluctuations in death rates, species assemblages, and biomass densities within an ecological community. These disturbances create places of renewal where new directions emerge out of the patchwork of natural experimentation and opportunity.[171][173] [174] Ecological resilience is a cornerstone theory in ecosystem management. Biodiversity fuels the resilience of ecosystems acting as a kind of regenerative insurance.[174]
Metabolism and the early atmosphere Metabolism – the rate at which energy and material resources are taken up from the environment, transformed within an organism, and allocated to maintenance, growth and reproduction – is a fundamental physiological trait. [175] Ernest et al. :991 The Earth formed approximately 4.5 billion years ago[176] and environmental conditions were too extreme for life to form for the first 500 million years. During this early Hadean period, the Earth started to cool, allowing a crust and oceans to form. Environmental conditions were unsuitable for the origins of life for the first billion years after the Earth formed. The Earth's atmosphere transformed from being dominated by hydrogen, to one composed mostly of methane and ammonia. Over the next billion years the metabolic activity of life transformed the atmosphere to higher concentrations of carbon dioxide, nitrogen, and water vapor. These gases changed the way that light from the sun hit the Earth's surface and greenhouse effects trapped heat. There were untapped sources of free energy within the mixture of reducing and oxidizing gasses that set the stage for primitive ecosystems to evolve and, in turn, the atmosphere also evolved.[177] Ecology 28
Throughout history, the Earth's atmosphere and biogeochemical cycles have been in a dynamic equilibrium with planetary ecosystems. The history is characterized by periods of significant transformation followed by millions of years of stability.[178] The evolution of the earliest organisms, likely anaerobic methanogen microbes, started the process by converting atmospheric hydrogen into methane (4H + CO 2 2 → CH + 2H O). Anoxygenic photosynthesis converting hydrogen 4 2 sulfide into other sulfur compounds or water (for example 2H S + CO 2 2 + hv → CH O + H O + 2S), as occurs in deep sea hydrothermal vents 2 2 The leaf is the primary site of photosynthesis in today, reduced hydrogen concentrations and increased atmospheric most plants. methane. Early forms of fermentation also increased levels of atmospheric methane. The transition to an oxygen dominant atmosphere (the Great Oxidation) did not begin until approximately 2.4-2.3 billion years ago, but photosynthetic processes started 0.3 to 1 billion years prior.[178][179]
Radiation: heat, temperature and light The biology of life operates within a certain range of temperatures. Heat is a form of energy that regulates temperature. Heat affects growth rates, activity, behavior and primary production. Temperature is largely dependent on the incidence of solar radiation. The latitudinal and longitudinal spatial variation of temperature greatly affects climates and consequently the distribution of biodiversity and levels of primary production in different ecosystems or biomes across the planet. Heat and temperature relate importantly to metabolic activity. Poikilotherms, for example, have a body temperature that is largely regulated and dependent on the temperature of the external environment. In contrast, homeotherms regulate their internal body temperature by expending metabolic energy.[119][120][166] There is a relationship between light, primary production, and ecological energy budgets. Sunlight is the primary input of energy into the planet's ecosystems. Light is composed of electromagnetic energy of different wavelengths. Radiant energy from the sun generates heat, provides photons of light measured as active energy in the chemical reactions of life, and also acts as a catalyst for genetic mutation.[119][120][166] Plants, algae, and some bacteria absorb light and assimilate the energy through photosynthesis. Organisms capable of assimilating energy by photosynthesis or through inorganic fixation of H S are autotrophs. Autotrophs—responsible for primary production—assimilate 2 light energy that becomes metabolically stored as potential energy in the form of biochemical enthalpic bonds.[119][120][166]
Physical environments
Water Wetland conditions such as shallow water, high plant productivity, and anaerobic substrates provide a suitable environment for important physical, biological, and chemical processes. Because of these processes, wetlands play a vital role in global nutrient and [180] element cycles.:29 The rate of diffusion of carbon dioxide and oxygen is approximately 10,000 times slower in water than it is in air. When soils become flooded, they quickly lose oxygen and transform into a low-concentration (hypoxic - O 2 concentration lower than 2 mg/liter) environment and eventually become completely (anoxic) environment where anaerobic bacteria thrive among the roots. Water also influences the spectral composition and amount of light as it reflects off the water surface and submerged particles.[180] Aquatic plants exhibit a wide variety of morphological and physiological adaptations that allow them to survive, compete and diversify these environments. For example, the roots and stems develop large air spaces (Aerenchyma) that regulate the efficient transportation gases (for example, CO and O ) used in respiration and photosynthesis. In drained soil, microorganisms use oxygen during 2 2 Ecology 29
respiration. In aquatic environments, anaerobic soil microorganisms use nitrate, manganese ions, ferric ions, sulfate, carbon dioxide and some organic compounds. The activity of soil microorganisms and the chemistry of the water reduces the oxidation-reduction potentials of the water. Carbon dioxide, for example, is reduced to methane (CH ) 4 by methanogenic bacteria. Salt water plants (or halophytes) have specialized physiological adaptations, such as the development of special organs for shedding salt and osmo-regulate their internal salt (NaCl) concentrations, to live in estuarine, brackish, or oceanic environments.[180] The physiology of fish is also specially adapted to deal with high levels of salt through osmoregulation. Their gills form electrochemical gradients that mediate salt excresion in saline environments and uptake in fresh water.[181]
Gravity The shape and energy of the land is affected to a large degree by gravitational forces. On a larger scale, the distribution of gravitational forces on the earth are uneven and influence the shape and movement of tectonic plates as well as having an influence on geomorphic processes such as orogeny and erosion. These forces govern many of the geophysical properties and distributions of ecological biomes across the Earth. On a organism scale, gravitational forces provide directional cues for plant and fungal growth (gravitropism), orientation cues for animal migrations, and influence the biomechanics and size of animals.[119] Ecological traits, such as allocation of biomass in trees during growth are subject to mechanical failure as gravitational forces influence the position and structure of branches and leaves.[182] The cardiovascular systems of all animals are functionally adapted to overcome pressure and gravitational forces that change according to the features of organisms (e.g., height, size, shape), their behavior (e.g., diving, running, flying), and the habitat occupied (e.g., water, hot deserts, cold tundra).[183]
Pressure Climatic and osmotic pressure places physiological constraints on organisms, such as flight and respiration at high altitudes, or diving to deep ocean depths. These constraints influence vertical limits of ecosystems in the biosphere as organisms are physiologically sensitive and adapted to atmospheric and osmotic water pressure differences.[119] Oxygen levels, for example, decrease with increasing pressure and are a limiting factor for life at higher altitudes.[184] Water transportation through trees is another important ecophysiological parameter where osmotic pressure gradients factor in.[185][186][187] Water pressure in the depths of oceans requires that organisms adapt to these conditions. For example, mammals, such as whales, dolphins and seals are specially adapted to deal with changes in sound due to water pressure differences.[188] Different species of hagfish provide another example of adaptation to deep-sea pressure through specialized protein adaptations.[189] Ecology 30
Wind and turbulence
Turbulent forces in air and water have significant effects on the environment and ecosystem distribution, form and dynamics. On a planetary scale, ecosystems are affected by circulation patterns in the global trade winds. Wind power and the turbulent forces it creates can influence heat, nutrient, and biochemical profiles of ecosystems.[119] For example, wind running over the surface of a lake creates turbulence, mixing the water column and influencing the environmental profile to create thermally layered zones, partially governing how fish, algae, and other parts of the aquatic ecology are structured.[192][193] Wind speed and turbulence also exert influence on rates of evapotranspiration rates and energy budgets in plants and The architecture of inflorescence in grasses is [180][194] animals. Wind speed, temperature and moisture content can subject to the physical pressures of wind and vary as winds travel across different landfeatures and elevations. The shaped by the forces of natural selection facilitating wind-pollination (or westerlies, for example, come into contact with the coastal and interior [190][191] anemophily). mountains of western North America to produce a rain shadow on the leeward side of the mountain. The air expands and moisture condenses as the winds move up in elevation which can cause precipitation; this is called orographic lift. This environmental process produces spatial divisions in biodiversity, as species adapted to wetter conditions are range-restricted to the coastal mountain valleys and unable to migrate across the xeric ecosystems of the Columbia Basin to intermix with sister lineages that are segregated to the interior mountain systems.[195][196]
Fire
Forest fires modify the land by leaving behind an environmental mosaic that diversifies the landscape into different seral stages and habitats of varied quality (left). Some species are adapted to forest fires, such as pine trees that open their cones only after fire exposure (right). Plants convert carbon dioxide into biomass and emit oxygen into the atmosphere.[197] Approximately 350 million years ago (near the Devonian period) the photosynthetic process brought the concentration of atmospheric oxygen above 17%, which allowed combustion to occur.[198] Fire releases CO and converts fuel into ash and tar. Fire is a 2 significant ecological parameter that raises many issues pertaining to its control and suppression in management.[199] While the issue of fire in relation to ecology and plants has been recognized for a long time,[200] Charles Cooper brought attention to the issue of forest fires in relation to the ecology of forest fire suppression and management in the 1960s.[201][202] Fire creates environmental mosaics and a patchiness to ecosystem age and canopy structure. Native North Americans were among the first to influence fire regimes by controlling their spread near their homes or by lighting fires to stimulate the production of herbaceous foods and basketry materials.[203] The altered state of soil nutrient supply and cleared canopy structure also opens new ecological niches for seedling establishment.[204][205] Most ecosystem are adapted to natural fire cycles. Plants, for example, are equipped with a variety of adaptations to deal with forest fires. Some species (e.g., Pinus halepensis) cannot germinate until after their seeds have lived through a fire. This environmental trigger for seedlings is called serotiny.[206] Some compounds from smoke also promote seed germination.[207] Fire plays a major role in the persistence and resilience of ecosystems.[173] Ecology 31
Biogeochemistry Ecologists study and measure nutrient budgets to understand how these materials are regulated, flow, and recycled through the environment.[119][120][166] This research has led to an understanding that there is a global feedback between ecosystems and the physical parameters of this planet including minerals, soil, pH, ions, water and atmospheric gases. There are six major elements, including H (hydrogen), C (carbon), N (nitrogen), O (oxygen), S (sulfur), and P (phosphorus) that form the constitution of all biological macromolecules and feed into the Earth's geochemical processes. From the smallest scale of biology the combined effect of billions upon billions of ecological processes amplify and ultimately regulate the biogeochemical cycles of the Earth. Understanding the relations and cycles mediated between these elements and their ecological pathways has significant bearing toward understanding global biogeochemistry.[208] The ecology of global carbon budgets gives one example of the linkage between biodiversity and biogeochemistry. For starters, the Earth's oceans are estimated to hold 40,000 gigatonnes (Gt) carbon, vegetation and soil is estimated to hold 2070 Gt carbon, and fossil fuel emissions are estimated to emit an annual flux of 6.3 Gt carbon.[209] At different times in the Earth's history there has been major restructuring in these global carbon budgets that was regulated to a large extent by the ecology of the land. For example, through the early-mid Eocene volcanic outgassing, the oxidation of methane stored in wetlands, and seafloor gases increased atmospheric CO (carbon 2 dioxide) concentrations to levels as high as 3500 ppm.[210] In the Oligocene, from 25 to 32 million years ago, there was another significant restructuring in the global carbon cycle as grasses evolved a special type of C4 photosynthesis and expanded their ranges. This new photosynthetic pathway evolved in response to the drop in atmospheric CO concentrations below 550 ppm.[211] These kinds of ecosystem functions feed back significantly 2 into global atmospheric models for carbon cycling. Loss in the abundance and distribution of biodiversity causes global carbon cycle feedbacks that are expected to increase rates of global warming in the next century.[212] The effect of global warming melting large sections of permafrost creates a new mosaic of flooded areas where decomposition results in the emission of methane (CH ). Hence, there is a relationship between global warming, 4 decomposition and respiration in soils and wetlands producing significant climate feedbacks and altered global biogeochemical cycles.[213][214] There is concern over increases in atmospheric methane in the context of the global carbon cycle, because methane is also a greenhouse gas that is 23 times more effective at absorbing long-wave radiation than CO on a 100 year time scale.[215] 2
History
Early beginnings Ecology has a complex origin due in large part to its interdisciplinary nature.[216] Ancient philosophers of Greece, including Hippocrates and Aristotle were among the first to record their observations on natural history. However, philosophers in ancient Greece viewed life as a static element that did not require an understanding of adaptation, a modern cornerstone of ecological theory.[217] Topics more familiar in the modern context, including food chains, population regulation, and productivity, did not develop until the 1700s through the published works of microscopist Antoni van Leeuwenhoek (1632–1723) and botanist Richard Bradley (1688?-1732).[6] Biogeographer Alexander von Humbolt (1769–1859) was another early pioneer in ecological thinking and was among the first to recognize ecological gradients. Humbolt alluded to the modern ecological law of species to area relationships.[218][219] In the early 20th century, ecology was an analytical form of natural history.[220] Following in the traditions of Aristotle, the descriptive nature of natural history examined the interaction of organisms with both their environment and their community. Natural historians, including James Hutton and Jean-Baptiste Lamarck, contributed significant works that laid the foundations of the modern ecological sciences.[221] The term "ecology" (German: Oekologie) is of a more recent origin and was first coined by the German biologist Ernst Haeckel in his book Generelle Morphologie der Organismen (1866). Haeckel was a zoologist, artist, writer, and later in life a professor of Ecology 32
comparative anatomy.[222][223] By ecology we mean the body of knowledge concerning the economy of nature-the investigation of the total relations of the animal both to its inorganic and its organic environment; including, above all, its friendly and inimical relations with those animals and plants with which it comes directly or indirectly into contact-in a word, ecology is the study of all those complex interrelations referred to by Darwin as the conditions of the struggle of existence. [224] Haeckel's definition quoted in Esbjorn-Hargens :6
Ernst Haeckel (left) and Eugenius Warming (right), two founders of ecology Opinions differ on who was the founder of modern ecological theory. Some mark Haeckel's definition as the beginning,[225] others say it was Eugenius Warming with the writing of Oecology of Plants: An Introduction to the Study of Plant Communities (1895).[226] Ecology may also be thought to have begun with Carl Linnaeus' research principals on the economy of nature that matured in the early 18th century.[80][227] He founded an early branch of ecological study he called the economy of nature.[80] The works of Linnaeus influenced Darwin in The Origin of Species where he adopted the usage of Linnaeus' phrase on the economy or polity of nature.[222] Linnaeus was the first to frame the balance of nature as a testable hypothesis. Haeckel, who admired Darwin's work, defined ecology in reference to the economy of nature which has led some to question if ecology is synonymous with Linnaeus' concepts for the economy of nature.[227] The modern synthesis of ecology is a young science, which first attracted substantial formal attention at the end of the 19th century (around the same time as evolutionary studies) and become even more popular during the 1960s environmental movement,[221] though many observations, interpretations and discoveries relating to ecology extend back to much earlier studies in natural history. For example, the concept on the balance or regulation of nature can be traced back to Herodotos (died c. 425 BC) who described an early account of mutualism along the Nile river where crocodiles open their mouths to beneficially allow sandpipers safe access to remove leeches.[216] In the broader contributions to the historical development of the ecological sciences, Aristotle is considered one of the earliest naturalists who had an influential role in the philosophical development of ecological sciences. One of Aristotle's students, Theophrastus, made astute ecological observations about plants and posited a philosophical stance about the autonomous relations between plants and their environment that is more in line with modern ecological thought. Both Aristotle and Theophrastus made extensive observations on plant and animal migrations, biogeography, physiology, and their habits in what might be considered an analog of the modern ecological niche.[228][229] Hippocrates, another Greek philosopher, is also credited with reference to ecological topics in its earliest developments.[6] Ecology 33
From Aristotle to Darwin the natural world was predominantly considered static and unchanged since its original creation. Prior to The Origin of Species there was little appreciation or understanding of the dynamic and reciprocal relations between organisms, their adaptations and their modifications to the environment.[232][224] While Charles Darwin is most notable for his treatise on evolution,[233] he is also one The layout of the first ecological experiment, of the founders of soil ecology.[234] In The Origin of Species Darwin noted by Charles Darwin in The Origin of also made note of the first ecological experiment that was published in Species, was studied in a grass garden at Woburn [230] 1816. In the science leading up to Darwin the notion of evolving Abbey in 1817. The experiment studied the performance of different mixtures of species species was gaining popular support. This scientific paradigm changed [230][231] planted in different kinds of soils. the way that researchers approached the ecological sciences.[235]
Nowhere can one see more clearly illustrated what may be called the sensibility of such an organic complex,--expressed by the fact that whatever affects any species belonging to it, must speedily have its influence of some sort upon the whole assemblage. He will thus be made to see the impossibility of studying any form completely, out of relation to the other forms,--the necessity for taking a comprehensive survey of the whole as a condition to a satisfactory understanding of any part. [236] Stephen Forbes (1887)
After the turn of 20th century Some suggest that the first ecological text (Natural History of Selborne) was published in 1789, by Gilbert White (1720–1793).[237] The first American ecology book was published in 1905 by Frederic Clements.[238] In his book, Clements forwarded the idea of plant communities as a superorganism. This publication launched a debate between ecological holism and individualism that lasted until the 1970s. The Clements superorganism concept proposed that ecosystems progress through regular and determined stages of seral development that are analogous to developmental stages of an organism whose parts function to maintain the integrity of the whole. The Clementsian paradigm was challenged by Henry Gleason.[239] According to Gleason, ecological communities develop from the unique and coincidental association of individual organisms. This perceptual shift placed the focus back onto the life histories of individual organisms and how this relates to the development of community associations.[240] The Clementsian superorganism theory has not been completely rejected, but some suggest it was an overextended application of holism.[114] Holism remains a critical part of the theoretical foundation in contemporary ecological studies.[162] Holism was first introduced in 1926 by a polarizing historical figure, a South African General named Jan Christian Smuts. Smuts was inspired by Clement's superorganism theory as he developed and published on the concept of holism, which contrasts starkly against his racial political views as the father of apartheid.[241] Around the same time, Charles Elton pioneered the concept of food chains in his classical book "Animal Ecology".[85] Elton[85] defined ecological relations using concepts of food chains, food cycles, food size, and described numerical relations among different functional groups and their relative abundance. Elton's 'food cycle' was replaced by 'food web' in a subsequent ecological text.[242] Ecology has developers in many nations, including Russia's Vladimir Vernadsky and his founding of the biosphere concept in the 1920s[243] or Japan's Kinji Imanishi and his concepts of harmony in nature and habitat segregation in the 1950s.[244] The scientific recognition or importance of contributions to ecology from other cultures is hampered by language and translation barriers.[243] Ecology 34
References
[1] "Millennium Ecosystem Assessment - Synthesis Report" (http:/ / www. millenniumassessment. org/ en/ Synthesis. aspx). United Nations. 2005. . Retrieved 4 February 2010. [2] de Groot, R. S.; Wilson, M. A.; Boumans, R. M. J. (2002). "A typology for the classification, description and valuation of ecosystem
functions, goods and services" (http:/ / yosemite. epa. gov/ SAB/ sabcvpess. nsf/ e1853c0b6014d36585256dbf005c5b71/
1c7c986c372fa8d485256e29004c7084/ $FILE/ deGroot et al. pdf). Ecological Economics 41 (3): 393–408. doi:10.1016/S0921-8009(02)00089-7. . [3] Aguirre, A.A. (2009). "Biodiversity and Human Health". EcoHealth 6: 153. doi:10.1007/s10393-009-0242-0. [4] Stadler, B.; Michalzik, B.; Müller, T. (1998). "Linking aphid ecology with nutrient fluxes in a coniferous forest". Ecology 79 (5): 1514–25. doi:10.1890/0012-9658(1998)079[1514:LAEWNF]2.0.CO;2. ISSN 0012-9658. [5] Humphreys, N. J.; Douglas, A. E. (1997). "Partitioning of Symbiotic Bacteria between Generations of an Insect: a Quantitative Study of a Buchnera sp. in the Pea Aphid (Acyrthosiphon pisum) Reared at Different Temperatures". Applied and Environmental Microbiology 63 (8): 3294–6. PMC 1389233. PMID 16535678.
[6] Odum, E. P.; Barrett, G. W. (2005). Fundamentals of ecology (http:/ / www. cengage. com/ search/ totalsearchresults. do?N=16& image.
x=0& image. y=0& keyword_all=fundamentals+ of+ ecology). Brooks Cole. p. 598. ISBN 9780534420666. .
[7] O'Neill, D. L.; Deangelis, D. L.; Waide, J. B.; Allen, T. F. H. (1986). A hierarchical concept of ecosystems (http:/ / books. google. com/
?id=Bj1cx_UeLK4C& printsec=frontcover& dq=a+ hierarchical+ concept+ of+ ecosystems#v=onepage& q& f=false). Princeton University Press. p. 253. ISBN 0-691-08436-X. . [8] Nachtomy, Ohad; Shavit, Ayelet; Smith, Justin (2002). "Leibnizian organisms, nested individuals, and units of selection". Theory in Biosciences 121 (2): 205. doi:10.1007/s12064-002-0020-9. [9] Holling, C. S. (2004). "Understanding the Complexity of Economic, Ecological, and Social Systems". Ecosystems 4 (5): 390–405. doi:10.1007/s10021-001-0101-5.
[10] Gotts, N. N. (2007). "Resilience, panarchy, and world-systems analysis" (http:/ / www. ecologyandsociety. org/ vol12/ iss1/ art24/ ). Ecology and Society 12 (1): 24. .
[11] Levin, S. A. (1999). Fragile dominion: Complexity and the commons (http:/ / books. google. com/ ?id=FUJsj2KOEeoC&
printsec=frontcover& dq=fragile+ dominion#v=onepage& q& f=false). Reading, Massachusetts: Perseus Books. ISBN 9780738203195. .
[12] Noss, R. F.; Carpenter, A. Y. (1994). Saving nature's legacy: protecting and restoring biodiversity (http:/ / islandpress. org/ bookstore/
details9234. html?prod_id=328). Island Press. p. 443. ISBN 9781559632485. . [13] Noss, R. F. (1990). "Indicators for Monitoring Biodiversity: A Hierarchical Approach". Conservation Biology 4 (4): 355–364. doi:10.1111/j.1523-1739.1990.tb00309.x. JSTOR 2385928.
[14] Scholes, R. J. et al (2008). "Toward a global biodiversity observing system" (http:/ / www. earthobservations. com/ documents/ committees/
uic/ 200809_8thUIC/ 07b-Health0Montira-Pongsiri-BON-Article-in-Science. pdf). Science 321 (5892): 1044–5. doi:10.1126/science.1162055. PMID 18719268. . [15] Wilson, E. O. (2000). "A Global Biodiversity Map". Science 289 (5488): 2279. doi:10.1126/science.289.5488.2279. PMID 11041790.
[16] Purvis, A.; Hector, A. (2000). "Getting the measure of biodiversity" (http:/ / www. botanischergarten. ch/ BiodivVorles-2005WS/
Nature-Insight-Biodiversity-2000. pdf). Nature 405 (6783): 212–8. doi:10.1038/35012221. PMID 10821281. . Retrieved 2010-03-16.
[17] Ostfeld, R. S. (2009). "Biodiversity loss and the rise of zoonotic pathogens" (http:/ / www. ecostudies. org/ reprints/
Ostfeld_2009_Clin_Microbiol_Inf. pdf). Clinical Microbiology and Infection 15 (s1): 40–3. doi:10.1111/j.1469-0691.2008.02691.x. PMID 19220353. .
[18] Tierney, G. L. et al (2009). "Monitoring and evaluating the ecological integrity of forest ecosystems" (http:/ / www. uvm. edu/ ~bmitchel/
Publications/ Tierney_Forest_monitoring. pdf). Frontiers in Ecology and the Environment 7 (6): 308–316. doi:10.1890/070176. . Retrieved 2010-03-16. [19] Wilcove, D. S.; Wikelski, M. (2008). "Going, Going, Gone: Is Animal Migration Disappearing". PLoS Biol 6 (7): e188. doi:10.1371/journal.pbio.0060188. PMC 2486312. PMID 18666834. [20] Svenning, Jens-Christian; Condi, R. (2008). "Biodiversity in a warmer world". Science 322 (5899): 206–7. doi:10.1126/science.1164542. PMID 18845738.
[21] Ceballos, G.; Ehrlich, P. R. (2002). "Mammal Population Losses and the Extinction Crisis" (http:/ / epswww. unm. edu/ facstaff/ gmeyer/
envsc330/ CeballosEhrlichmammalextinct2002. pdf). Science 296 (5569): 904–907. Bibcode 2002Sci...296..904C. doi:10.1126/science.1069349. PMID 11988573. . Retrieved 2010-03-16.
[22] Palumbi, S. R. et al (2009). "Managing for ocean biodiversity to sustain marine ecosystem services" (http:/ / research. usm. maine. edu/
gulfofmaine-census/ wp-content/ docs/ Palumbi-et-al-2009_Managing-for-ocean-biodiversity. pdf). Frontiers in Ecology and the Environment 7 (4): 204–211. doi:10.1890/070135. . [23] Hammond, H. (2009). Maintaining whole systems on the Earth's crown: Ecosystem-based conservation planning for the Boreal forest (http:/
/ www. silvafor. org/ crown). Slocan Park, BC: Silva Forest Foundation. p. 380. ISBN 978-0-9734779-0-0. . [24] Whittaker, R. H.; Levin, S. A.; Root, R. B. (1973). "Niche, Habitat, and Ecotope". The American Naturalist 107 (955): 321–338. doi:10.1086/282837. JSTOR 2459534. [25] Beyer, H. L. et al (2010). "The interpretation of habitat preference metrics under use–availability designs". Phil. Trans. R. Soc. B 365 (1550): 2245–54. doi:10.1098/rstb.2010.0083. PMC 2894962. PMID 20566501. Ecology 35
[26] Schoener, T. W. (1975). "Presence and absence of habitat shift in some widespread lizard species". Ecological Monographs 45 (3): 233–258. doi:10.2307/1942423. JSTOR 1942423. [27] Vitt, L. J.; Caldwell, J. P.; Zani, P. A.; Titus, T. A. (1997). "The role of habitat shift in the evolution of lizard morphology: evidence from tropical Tropidurus". PNAS 94 (8): 3828–3832. Bibcode 1997PNAS...94.3828V. doi:10.1073/pnas.94.8.3828. PMC 20526. PMID 9108063. [28] Kiessling, W.; Simpson, C.; Foote, M. (2009). "Reefs as Cradles of Evolution and Sources of Biodiversity in the Phanerozoic". Science 327 (5962): 196–8. Bibcode 2010Sci...327..196K. doi:10.1126/science.1182241. PMID 20056888. [29] Laland, K. N.; Odling-Smee, F.J.; Feldman, M.W. (1999). "Evolutionary consequences of niche construction and their implications for ecology". Proc. Natl. Acad. Sci. U.S.A. 96 (18): 10242–7. Bibcode 1999PNAS...9610242L. doi:10.1073/pnas.96.18.10242. PMC 17873. PMID 10468593.
[30] Hughes, D. P.; Pierce, N. E.; Boomsma, J. J. (2008). "Social insect symbionts: evolution in homeostatic fortresses" (http:/ / www. csub. edu/
~psmith3/ Teaching/ discussion3C. pdf). Trends in Ecology & Evolution 23 (12): 672–7. doi:10.1016/j.tree.2008.07.011. PMID 18951653. .
[31] Wiens, J. J.; Graham, C. H. (2005). "Niche Conservatism: Integrating Evolution, Ecology, and Conservation Biology" (http:/ / 163. 238. 8.
180/ ~fburbrink/ Courses/ Seminar in Systematics/ Wiens_Graha_m_AnnRev2005. pdf). Annual Review of Ecology, Evolution, and Systematics 36: 519–539. doi:10.1146/annurev.ecolsys.36.102803.095431. . [32] Hutchinson, G. E. (1957). A Treatise on Limnology.. New York: Wiley. p. 1015. ISBN 0471425729.
[33] Hutchinson, G. E. (1957). "Concluding remarks" (http:/ / symposium. cshlp. org/ content/ 22/ 415. full. pdf+ html). Cold Spring Harb Symp Quant Biol 22: 415–427. doi:10.1101/SQB.1957.022.01.039. .
[34] Begon, M.; Townsend, C. R.; Harper, J. L. (2005). Ecology: From individuals to ecosystems. (http:/ / ca. wiley. com/ WileyCDA/
WileyTitle/ productCd-1405111178. html) (4th ed.). Wiley-Blackwell. p. 752. ISBN 1405111178. . [35] D. L., Hardesty (1975). "The Niche Concept: Suggestions for Its Use in Human Ecology". Human Ecology 3 (2): 71–85. doi:10.1007/BF01552263. JSTOR 4602315.
[36] Pearman, P. B.; Guisan, A.; Broennimann, O.; Randin, C. F. (2008). "Niche dynamics in space and time" (http:/ / connected. uwc. ac. za/
blog/ upload/ SABIF_niche_modelling/ Literature/ Range_limiting_factors/ GeneralTheory/ Pearman et al 2008 Niche dynamics in space and
time. pdf). Trends in Ecology & Evolution 23 (3): 149–158. doi:10.1016/j.tree.2007.11.005. PMID 18289716. . [37] McGill, B. J.; Enquist, B. J.; Weiher, E.; Westoby, M. (2006). "Rebuilding community ecology from functional traits". Trends in Ecology and Evolution 21 (4): 178–185. doi:10.1016/j.tree.2006.02.002. PMID 16701083. [38] Hardin, G. (1960). "The competitive exclusion principal". Science 131 (3409): 1292–7. Bibcode 1960Sci...131.1292H. doi:10.1126/science.131.3409.1292. PMID 14399717.
[39] Scheffer, M.; van Nes, E. H. (2006). "Self-organized similarity, the evolutionary emergence of groups of similar species" (http:/ / theory.
bio. uu. nl/ rdb/ te/ Projects/ Papers/ Scheffer_pnas06_comments. pdf). Proceedings of the National Academy of Sciences 103 (16): 6230–6235. Bibcode 2006PNAS..103.6230S. doi:10.1073/pnas.0508024103. ISBN 0508024103. . [40] Hastings, A. B. et al (2007). "Ecosystem engineering in space and time". Ecology Letters 10 (2): 153–164. doi:10.1111/j.1461-0248.2006.00997.x. PMID 17257103. [41] Jones, Clive G.; Lawton, John H.; Shachak, Moshe (1994). "Organisms as ecosystem engineers". Oikos 69 (3): 373–386. doi:10.2307/3545850. JSTOR 3545850. [42] Wright, J.P.; Jones, C.G. (2006). "The Concept of Organisms as Ecosystem Engineers Ten Years On: Progress, Limitations, and Challenges". BioScience 56 (3): 203–9. doi:10.1641/0006-3568(2006)056[0203:TCOOAE]2.0.CO;2. ISSN 0006-3568.
[43] Day, R. L.; Laland, K. N.; Odling-Smee, J. (2003). "Rethinking Adaptation: the niche-construction perspective" (https:/ / apps. lis. illinois.
edu/ wiki/ download/ attachments/ 10981360/ day_odling-smee-niche_construction. pdf). Perspectives in Biology and Medicine 46 (1): 80–95. doi:10.1353/pbm.2003.0003. PMID 12582272. .
[44] Palmer, M.; White, P. S. (1994). "On the existence of ecological communities" (http:/ / www. bio. unc. edu/ faculty/ White/ Reprints/
Palmer_White_JVS_5_2_818340. pdf). Journal of Vegetation Sciences 5 (2): 279–282. doi:10.2307/3236162. JSTOR 3236162. . [45] Prentice, I. C. et al (1992). "Special Paper: A Global Biome Model Based on Plant Physiology and Dominance, Soil Properties and Climate". Journal of Biogeography 19 (2): 117–134. doi:10.2307/2845499. JSTOR 2845499. [46] Turnbaugh, P. J. et al (2007). "The Human Microbiome Project". Nature 449 (7164): 804–810. Bibcode 2007Natur.449..804T. doi:10.1038/nature06244. PMID 17943116.
[47] DeLong, E. F. (2009). "The microbial ocean from genomes to biomes" (http:/ / researchpages. net/ media/ resources/ 2009/ 07/ 30/
nature08059. pdf). Nature 459 (7244): 200–6. Bibcode 2009Natur.459..200D. doi:10.1038/nature08059. PMID 19444206. .
[48] Igamberdiev, Abir U.; Lea, P. J. (2006). "Land plants equilibrate O and CO concentrations in the atmosphere" (http:/ / www. mun. ca/ 2 2
biology/ igamberdiev/ PhotosRes_CO2review. pdf). Photosynthesis Research 87 (2): 177–194. doi:10.1007/s11120-005-8388-2. PMID 16432665. . [49] Lovelock, J.; Margulis, Lynn (1973). "Atmospheric homeostasis by and for the biosphere: the Gaia hypothesis". Tellus 26: 2–10. Bibcode 1974Tell...26....2L. doi:10.1111/j.2153-3490.1974.tb01946.x. [50] Lovelock, J. (2003). "The living Earth". Nature 426 (6968): 769–770. doi:10.1038/426769a. PMID 14685210. [51] Waples, R. S.; Gaggiotti, O. (2006). "What is a population? An empirical evaluation of some genetic methods for identifying the number of gene pools and their degree of connectivity". Molecular Ecology 15 (6): 1419–39. doi:10.1111/j.1365-294X.2006.02890.x. PMID 16629801. [52] Turchin, P. (2001). "Does Population Ecology Have General Laws?". Oikos 94 (1): 17–26. doi:10.1034/j.1600-0706.2001.11310.x.
[53] Johnson, J. B.; Omland, K. S. (2004). "Model selection in ecology and evolution" (http:/ / www. usm. maine. edu/ bio/ courses/ bio621/
model_selection. pdf). Trends in Ecology and Evolution 19 (2): 101–8. doi:10.1016/j.tree.2003.10.013. PMID 16701236. . Ecology 36
[54] Vandermeer, J. H.; Goldberg, D. E. (2003). Population ecology: First principles. Woodstock, Oxfordshire: Princeton University Press. ISBN 0-691-11440-4. [55] Berryman, A. A. (1992). "The Origins and Evolution of Predator-Prey Theory". Ecology 73 (5): 1530–5. doi:10.2307/1940005. JSTOR 1940005.
[56] Levins, R. (1969). "Some demographic and genetic consequences of environmental heterogeneity for biological control" (http:/ / books.
google. com/ ?id=8jfmor8wVG4C& pg=PA162). Bulletin of the Entomological Society of America 15: 237–240. ISBN 9780231126809. .
[57] Levins, R. (1970). Gerstenhaber, M.. ed. Extinction. In: Some Mathematical Questions in Biology (http:/ / books. google. com/
?id=CfZHU1aZqJsC& dq=Some+ Mathematical+ Questions+ in+ Biology& printsec=frontcover). pp. 77–107. ISBN 9780821811528. . [58] Smith, M. A.; Green, D. M. (2005). "Dispersal and the metapopulation paradigm in amphibian ecology and conservation: are all amphibian populations metapopulations?". Ecography 28 (1): 110–128. doi:10.1111/j.0906-7590.2005.04042.x.
[59] Hanski, I. (1998). "Metapopulation dynamics" (http:/ / www. helsinki. fi/ ~ihanski/ Articles/ Nature 1998 Hanski. pdf). Nature 396 (6706): 41–9. Bibcode 1998Natur.396...41H. doi:10.1038/23876. .
[60] Nebel, S. (2010). "Animal migration" (http:/ / www. nature. com/ scitable/ knowledge/ library/ animal-migration-13259533). Nature Education Knowledge 10 (1): 29. . [61] Clark, J. S.; Fastie, C.; Hurtt, G.; Jackson, S. T.; Johnson, C.; King, G. A.; et al., M.; Lynch, J. et al (1998). "Reid's Paradox of Rapid Plant
Migration" (http:/ / www. mathstat. ualberta. ca/ ~mlewis/ publications/ 25Clark1998B. pdf). BioScience 48 (1): 13–24. doi:10.2307/1313224. .
[62] Hanski, I.; Gaggiotti, O. E., eds. (2004). Ecology, genetics and evolution of metapopulations. (http:/ / books. google. com/
?id=EP8TAQAAIAAJ& q=ecology,+ genetics,+ and+ evolution+ of+ metapopulations& dq=ecology,+ genetics,+ and+ evolution+ of+
metapopulations& cd=1). Burlington, MA: Elsevier Academic Press. ISBN 0-12-323448-4. .
[63] MacKenzie, D. I. (2006). Occupancy Estimation and Modeling: Inferring patterns and dynamics of species occurrence. (http:/ / books.
google. com/ ?id=RaCmF9PioCIC& printsec=frontcover). London, UK: Elsevier Academic Press. p. 324. ISBN 978-0-12-088766-8. . [64] Johnson, M. T.; Strinchcombe, J. R. (2007). "An emerging synthesis between community ecology and evolutionary biology". Trends in Ecology and Evolution 22 (5): 250–7. doi:10.1016/j.tree.2007.01.014. PMID 17296244. [65] Brinson, M. M.; Lugo, A. E.; Brown, S (1981). "Primary Productivity, Decomposition and Consumer Activity in Freshwater Wetlands". Annual Review of Ecology and Systematics 12: 123–161. doi:10.1146/annurev.es.12.110181.001011.
[66] Davic, R. D.; Welsh, H. H. (2004). "On the Ecological Role of Salamanders" (http:/ / www. fs. fed. us/ psw/ publications/ welsh/ captured/
psw_2004_welsh008. pdf). Annual Review of Ecology and Systematics 35: 405–434. doi:10.1146/annurev.ecolsys.35.112202.130116. . [67] Paine, R. T. (1980). "Food Webs: Linkage, Interaction Strength and Community Infrastructure". Journal of Animal Ecology 49 (3): 667–685. JSTOR 4220. [68] Abrams, P. A. (1993). "Effect of Increased Productivity on the Abundances of Trophic Levels". The American Naturalist 141 (3): 351–371. doi:10.1086/285478. JSTOR 2462676.
[69] Tansley, A. G. (1935). "The Use and Abuse of Vegetational Concepts and Terms" (http:/ / karljaspers. org/ files/ tansley. pdf). Ecology 16 (3): 284–307. doi:10.2307/1930070. JSTOR 1930070. .
[70] Marsh, G. P. (1864). Man and nature: Physical geography as modified by human action. (http:/ / books. google. com/ ?id=q-7wEQi0Gj0C&
printsec=frontcover& dq=inauthor:"George+ Perkins+ Marsh"#v=onepage& q& f=false). Cambridge, Massachusetts, USA: Belknap Press. p. 560. .
[71] O'Neil, R. V. (2001). "Is it time to bury the ecosystem concept? (With full military honors, of course!)" (http:/ / www. esa. org/ history/
Awards/ papers/ ONeill_RV_MA. pdf). Ecology 82 (12): 3275–3284. doi:10.1890/0012-9658(2001)082[3275:IITTBT]2.0.CO;2. ISSN 0012-9658. .
[72] Levin, S. A. (1998). "Ecosystems and the Biosphere as Complex Adaptive Systems" (http:/ / citeseerx. ist. psu. edu/ viewdoc/
download?doi=10. 1. 1. 83. 6318& rep=rep1& type=pdf). Ecosystems 1 (5): 431–6. doi:10.1007/s100219900037. .
[73] Pimm, S. (2002). Food webs (http:/ / books. google. com/ ?id=tjHOtK4amfQC& pg=PA173& dq=food+ web#v=onepage& q=food web& f=false). University of Chicago Press. p. 258. ISBN 9780226668321. .
[74] Pimm, S. L.; Lawton, J. H.; Cohen, J. E. (1991). "Food web patterns and their consequences" (http:/ / www. esf. edu/ EFB/ Schulz/
Seminars/ Pimm. pdf). Nature 350 (6320): 669–674. Bibcode 1991Natur.350..669P. doi:10.1038/350669a0. . [75] Worm, B.; Duffy, J.E. (2003). "Biodiversity, productivity and stability in real food webs". Trends in Ecology and Evolution 18 (12): 628–632. doi:10.1016/j.tree.2003.09.003.
[76] McCann, K. (2007). "Protecting biostructure" (http:/ / www. bolinfonet. org/ pdf/ McCann_2007_biostructure. pdf). Nature 446 (7131): 29–29. Bibcode 2007Natur.446...29M. doi:10.1038/446029a. PMID 17330028. .
[77] Wilbur, H. W. (1997). "Experimental ecology of food webs: Complex systems in temporary ponds" (http:/ / www. esa. org/ history/ papers/
Wilbur_HM_MA. pdf) (PDF). Ecology 78 (8): 2279–2302. doi:10.1890/0012-9658(1997)078[2279:EEOFWC]2.0.CO;2. ISSN 0012-9658. .
[78] Emmerson, M; Yearsley, J. M. (2004). "Weak interactions, omnivory and emergent food-web properties" (http:/ / www. ucc. ie/ people/
memmers/ pdfs/ Emmerson. Yearsley. Proc. Roy. Soc. B. 2004. pdf). Proc. R. Soc. Lond. B 271 (1537): 397–405. doi:10.1098/rspb.2003.2592. . [79] Krause, A. E.; Frank, K. A.; Mason, D. M.; Ulanowicz, R. E.; Taylor, W. W. (2003). "Compartments revealed in food-web structure" (http:/
/ www. glerl. noaa. gov/ pubs/ fulltext/ 2003/ 20030014. pdf). Nature 426 (6964): 282–285. Bibcode 2003Natur.426..282K. doi:10.1038/nature02115. PMID 14628050. . Ecology 37
[80] Egerton, Frank N. (2007). "Understanding Food Chains and Food Webs, 1700–1970". Bulletin of the Ecological Society of America 88: 50–69. doi:10.1890/0012-9623(2007)88[50:UFCAFW]2.0.CO;2. ISSN 0012-9623. [81] Shurin, J. B.; Gruner, D. S.; Hillebrand, H. (2006). "All wet or dried up? Real differences between aquatic and terrestrial food webs". Proc. R. Soc. B 273 (1582): 1–9. doi:10.1098/rspb.2005.3377. PMC 1560001. PMID 16519227. [82] Edwards, J.; Fraser, K. (1983). "Concept maps as reflectors of conceptual understanding". Research in science education 13: 19–26. Bibcode 1983RScEd..13...19E. doi:10.1007/BF02356689.
[83] Hairston, N. G.; Hairston, N. G. (1993). "Cause-effect relationships in energy flow, trophic structure, and interspecific interactions" (http:/ /
limnology. wisc. edu/ courses/ zoo955/ Spring2005/ food web seminar papers/ hairston93AmNat. pdf). The American Naturalist 142 (3): 379–411. doi:10.1086/285546. . [84] Duffy, J. E. et al (2007). "The functional role of biodiversity in ecosystems: incorporating trophic complexity". Ecology Letters 10 (6): 522–538. doi:10.1111/j.1461-0248.2007.01037.x. PMID 17498151. [85] Elton, C. S. (1927). Animal Ecology. London, UK.: Sidgwick and Jackson. ISBN 0226206394.
[86] Davic, R. D. (2003). "Linking keystone species and functional groups: a new operational definition of the keystone species concept" (http:/ /
www. consecol. org/ vol7/ iss1/ resp11/ ). Conservation Ecology 7 (1): r11. . [87] Oksanen, L. (1991). "Trophic levels and trophic dynamics: A consensus emerging?". Trends in Ecology and Evolution 6 (2): 58–60. doi:10.1016/0169-5347(91)90124-G. PMID 21232425. [88] Loehle, C.; Pechmann, Joseph H. K. (1988). "Evolution: The Missing Ingredient in Systems Ecology". The American Naturalist 132 (9): 884–899. doi:10.1086/284895. JSTOR 2462267. [89] Ulanowicz, R. E.; Kemp, W. Michael (1979). "Toward Canonical Trophic Aggregations". The American Naturalist 114 (6): 871–883. doi:10.1086/283534. JSTOR 2460557. [90] Li, B. (2000). "Why is the holistic approach becoming so important in landscape ecology?". Landscape and Urban Planning 50 (1–3): 27–41. doi:10.1016/S0169-2046(00)00078-5.
[91] Polis, G. A.; Strong, D. R. (1996). "Food web complexity and community dynamics" (http:/ / limnology. wisc. edu/ courses/ zoo955/
Spring2005/ food web seminar papers/ polis96AmNat. pdf). The American Naturalist 147 (5): 813–846. doi:10.1086/285880. . [92] Thompson, R. M.; Hemberg, M.; Starzomski, B. M.; Shurin, J. B. (2007). "Trophic levels and trophic tangles: The prevalence of omnivory
in real food webs" (http:/ / myweb. dal. ca/ br238551/ thompson_hem_star_shur_ecology07. pdf). Ecology 88 (3): 612–617. doi:10.1890/05-1454. PMID 17503589. . [93] Fischer, J.; Lindenmayer, D. B.; Manning, A. D. (2006). "Biodiversity, ecosystem function, and resilience: ten guiding principles for
commodity production landscapes" (http:/ / www. tecniflora. com. br/ 1_-_Guidelines_commodity_production. pdf). Frontiers in Ecology and the Environment 4 (2): 80–86. doi:10.1890/1540-9295(2006)004[0080:BEFART]2.0.CO;2. ISSN 1540-9295. .
[94] Libralato, S.; Christensen, V.; Pauly, D. (2006). "A method for identifying keystone species in food web models" (http:/ / www. fisheries.
ubc. ca/ archive/ members/ dpauly/ journalArticles/ 2005/ MethodIdentifyKeystoneSpeciesFoodWebModels. pdf). Ecological Modelling 195 (3–4): 153–171. doi:10.1016/j.ecolmodel.2005.11.029. . [95] Mills, L.S.; Soule, M.E.; Doak, D.F. (1993). "The Keystone-Species Concept in Ecology and Conservation". BioScience 43 (4): 219–224. doi:10.2307/1312122. JSTOR 1312122. [96] Anderson, P.K. (1995). "Competition, predation, and the evolution and extinction of Stellar's sea cow, Hydrodamalis gigas". Marine Mammal Science 11 (3): 391–4. doi:10.1111/j.1748-7692.1995.tb00294.x.
[97] Polis, G.A. et al (2000). "When is a trophic cascade a trophic cascade?" (http:/ / www. cof. orst. edu/ leopold/ class-reading/ Polis 2000. pdf). Trends in Ecology and Evolution 15 (11): 473–5. doi:10.1016/S0169-5347(00)01971-6. PMID 11050351. . [98] Coleman, D. C.; Odum, E. P.; Crossley, D. A. (1992). "Soil biology, soil ecology, and global change". Biology and Fertility of Soils 14 (2): 104–111. doi:10.1007/BF00336258.
[99] Coleman, D. C.; Corssley, D. A.; Hendrix, P. F. (2004). Fundamentals of soil ecology (http:/ / books. google. ca/
books?id=pKKDJwu_OlkC& printsec=frontcover& dq=Fundamentals+ of+ soil+ ecology#v=onepage& q& f=false) (2nd ed.). Academic Press. ISBN 0121797260. . [100] Lecerf, A.; Dobson, M.; Dang, C. K.; Chauvet, E (2005). "Riparian plant species loss alters trophic dynamics in detritus-based stream
ecosystems" (http:/ / www. ecolab. ups-tlse. fr/ rivfunction/ download/ Lecerf et al 2005. pdf). Oecologia 146 (3): 432–442. doi:10.1007/s00442-005-0212-3. PMID 16096846. . [101] Wilkinson, M. T.; Richards, P. J.; Humphreys, G. S. (2009). "Breaking ground: Pedological, geological, and ecological implications of soil
bioturbation" (http:/ / 128. 163. 2. 27/ AS/ Geography/ People/ Faculty/ Wilkinson/ Wilkinson. ESR. pdf). Earth-Science Reviews 97 (1–4): 257–272. doi:10.1016/j.earscirev.2009.09.005. . [102] Hasiotis, S. T. (2003). "Complex ichnofossils of solitary and social soil organisms: understanding their evolution and roles in terrestrial paleoecosystems". Palaeogeography, Palaeoclimatology, Palaeoecology 192 (2): 259–320. doi:10.1016/S0031-0182(02)00689-2. [103] Levin, S. A. (2000). "Multiple scales and the maintenance of biodiversity". Ecosystems 3 (6): 498–506. doi:10.1007/s100210000044.
[104] Novikoff, AB (1945). "The concept of integrative levels and biology" (http:/ / rogov. zwz. ru/ Macroevolution/ novikoff. pdf). Science 101 (2618): 209–215. Bibcode 1945Sci...101..209N. doi:10.1126/science.101.2618.209. PMID 17814095. .
[105] Schneider, D. D. (2001). "The Rise of the Concept of Scale in Ecology" (http:/ / www. mun. ca/ biology/ dschneider/ Publications/
2001DCS_AIBS_RiseOfScale. pdf). BioScience 51 (7): 545–553. doi:10.1641/0006-3568(2001)051[0545:TROTCO]2.0.CO;2. ISSN 0006-3568. . Retrieved 2010-03-16. Ecology 38
[106] Molnar, J.; Marvier, M.; Kareiva, P. (2004). "The sum is greater than the parts" (http:/ / www. environmental-expert. com/
Files\8392\articles\9961\TheSumIsGreaterthantheParts. pdf). Conservation Biology 18 (6): 1670–1. doi:10.1111/j.1523-1739.2004.00l07.x. . [107] Loehle, C. (2004). "Challenges of ecological complexity". Ecological complexity 1 (1): 3–6. doi:10.1016/j.ecocom.2003.09.001. [108] Odum, E. P. (1977). "The emergence of ecology as a new integrative discipline". Science 195 (4284): 1289–93. Bibcode 1977Sci...195.1289O. doi:10.1126/science.195.4284.1289. PMID 17738398.
[109] Scheffer, M.; Carpenter, S.; Foley, J. A.; Walker, B.; Walker, B (2001). "Catastrophic shifts in ecosystems" (http:/ / bio. classes. ucsc. edu/
bioe107/ Scheffer 2001 Nature. pdf). Nature 413 (6856): 591–596. Bibcode 2001Natur.413..591S. doi:10.1038/35098000. PMID 11595939. .
[110] "Welcome to ILTER — ILTER" (http:/ / www. ilternet. edu/ ). International Long Term Ecological Research. . Retrieved 2010-03-16.
[111] Silverton, J. et al (2006). "The Park Grass Experiment 1856–2006: its contribution to ecology" (http:/ / www. demonsineden. com/ Site/
Research_publications_files/ Silvertown et al. 2006. pdf). Journal of Ecology 94 (4): 801–814. doi:10.1111/j.1365-2745.2006.01145.x. .
[112] "Hubbard Brook Ecosystem Study Front Page" (http:/ / www. hubbardbrook. org/ ). . Retrieved 2010-03-16. [113] Mikkelson, G. M. (In Press.). Skipper, R. A.; Ankeny, L.; Allen, C. et al. eds. Part-whole Relationships and the unity of ecology. In,
Philosophy across the Life Sciences. (http:/ / webpages. mcgill. ca/ staff/ Group3/ gmikke/ web/ pwrue. pdf). Cambridge, MA.: MIT Press.. . [114] Wilson, D. S. (1988). "Holism and Reductionism in Evolutionary Ecology". Oikos 53 (2): 269–273. doi:10.2307/3566073. JSTOR 3566073. [115] Miles, D. B.; Dunham, A. E. (1993). "Historical Perspectives in Ecology and Evolutionary Biology: The Use of Phylogenetic Comparative Analyses". Annual Review of Ecology and Systematics 24: 587–619. doi:10.1146/annurev.es.24.110193.003103.
[116] Trends in Ecology and Evolution. (http:/ / www. cell. com/ trends/ ecology-evolution/ home) Official Cell Press page the journal. Elsevier, Inc. 2009 [117] Vrba, E. S.; Eldredge, N. (1984). "Individuals, Hierarchies and Processes: Towards a More Complete Evolutionary Theory". Paleobiology 10 (2): 146–171. JSTOR 2400395. [118] Gould, S.J.; Lloyd, E.A. (1999). "Individuality and adaptation across levels of selection: How shall we name and generalize the unit of Darwinism?". Proc. Natl. Acad. Sci. U.S.A. 96 (21): 11904–9. Bibcode 1999PNAS...9611904G. doi:10.1073/pnas.96.21.11904. PMC 18385. PMID 10518549.
[119] Allee, W.C.; Park, O.; Emerson, A. E.; Park, T.; Schmidt, K.P. (1949). Principles of animal ecology (http:/ / www. archive. org/ stream/
principlesofanim00alle#page/ n5/ mode/ 2up). W. B. Sunders, Co.. p. 837. ISBN 0721611206. . [120] Rickleffs, Robert, E. (1996). The Economy of Nature. University of Chicago Press. p. 678. ISBN 0716738473. [121] Stuart-Fox, D.; Moussalli, A. (2008). "Selection for Social Signalling Drives the Evolution of Chameleon Colour Change". PLoS Biol 6 (1): e25. doi:10.1371/journal.pbio.0060025. PMC 2214820. PMID 18232740. [122] Karban, R. (2008). "Plant behaviour and communication". Ecology Letters 11 (7): 727–739. doi:10.1111/j.1461-0248.2008.01183.x. PMID 18400016.
[123] Tinbergen, N. (1963). "On aims and methods of ethology" (http:/ / www. esf. edu/ EFB/ faculty/ documents/ Tinbergen1963onethology. pdf) (PDF). Zeitschrift für Tierpsychologie 20 (4): 410–433. doi:10.1111/j.1439-0310.1963.tb01161.x. .
[124] Hamner, W. M. (1985). "The importance of ethology for investigations of marine zooplankton" (http:/ / www. ingentaconnect. com/
content/ umrsmas/ bullmar/ 1985/ 00000037/ 00000002/ art00005). Bulletin of Marine Science 37 (2): 414–424. . [125] Strassmann, J. E.; Zhu, Y; Queller, DC (2000). "Altruism and social cheating in the social amoeba Dictyostelium discoideum". Nature 408 (6815): 965–967. doi:10.1038/35050087. PMID 11140681. [126] Sakurai, K. (1985). "An attelabid weevil (Euops splendida) cultivates fungi". Journal of Ethology 3 (2): 151–156. doi:10.1007/BF02350306. [127] Anderson, J. D. (1961). "The courtship behaviour of Ambystoma macrodactylum croceum". Copeia 2 (2): 132–139. JSTOR 1439987.
[128] "Behavioral Ecology" (http:/ / www. behavecol. com/ pages/ society/ welcome. html). International Society for Behavioral Ecology. . Retrieved 15 April 2011. [129] Gould, Stephen, J.; Vrba, Elizabeth, S. (1982). "Exaptation-a missing term in the science of form". Paleobiology 8 (1): 4–15. [130] Ives, A. R.; Cardinale, B. J.; Snyder, W. E. (2004). "A synthesis of subdisciplines: predator–prey interactions, and biodiversity and
ecosystem functioning" (http:/ / www. lifesci. ucsb. edu/ eemb/ labs/ cardinale/ pdfs/ ives_ecol_lett_2005. pdf). Ecology Letters 8 (1): 102–116. doi:10.1111/j.1461-0248.2004.00698.x. .
[131] Krebs, J. R.; Davies, N. B. (1993). An Introduction to Behavioural Ecology (http:/ / books. google. com/ ?id=CA31asx7zq4C& printsec=frontcover). Wiley-Blackwell. p. 432. ISBN 978-0632035465. . [132] Webb, J. K.; Pike, D. A.; Shine, R. (2010). "Olfactory recognition of predators by nocturnal lizards: safety outweighs thermal benefits". Behavioural Ecology 21 (1): 72–77. doi:10.1093/beheco/arp152. [133] Cooper, W. E.; Frederick, W. G. (2010). "Predator lethality, optimal escape behavior, and autotomy". Behavioral Ecology 21 (1): 91–96. doi:10.1093/beheco/arp151. [134] Eastwood, R. (2004). "Successive replacement of tending ant species at aggregations of scale insects (Hemiptera: Margarodidae and
Eriococcidae) on Eucalyptus in south-east Queensland" (http:/ / www. oeb. harvard. edu/ faculty/ pierce/ people/ eastwood/ resources/ pdfs/
Scale-ant2004. pdf). Australian Journal of Entomology 43: 1–4. doi:10.1111/j.1440-6055.2003.00371.x. .
[135] Kodric-Brown, A.; Brown, J. H. (1984). "Truth in advertising: The kinds of traits favored by sexual selection" (http:/ / dbs. umt. edu/
courses/ biol406/ readings/ Wk6-Kodric-Brown and Brown 1984. pdf). The American Naturalist 124 (3): 309–323. doi:10.1086/284275. .
[136] Sherman, P. W.; Lacey, E. A.; Reeve, H. K.; Keller, L. (1995). "The eusociality continuum" (http:/ / www. nbb. cornell. edu/ neurobio/
BioNB427/ READINGS/ ShermanEtAl1995. pdf) (PDF). Behavioural Ecology 6 (1): 102–8. . Ecology 39
[137] Wilson, D. S.; Wilson, E. O. (December 2007). "Rethinking the theoretical foundation of sociobiology". The Quarterly Review of Biology 82 (4): 327–348. doi:10.1086/522809. PMID 18217526. [138] Page, R. d. m. (1991). "Clocks, Clades, and Cospeciation: Comparing Rates of Evolution and Timing of Cospeciation Events in Host-Parasite Assemblages". Systematic Zoology 40 (2): 188–198. doi:10.2307/2992256. JSTOR 2992256. [139] Kiers, E. T.; van der Heijden, M. G. A. (2006). "Mutualistic stability in the arbuscular mycorrhizal symbiosis: Exploring hypotheses of
evolutionary cooperation" (http:/ / people. umass. edu/ lsadler/ adlersite/ kiers/ Kiers_Ecology_2006. pdf). Ecology 87 (7): 1627–36. doi:10.1890/0012-9658(2006)87[1627:MSITAM]2.0.CO;2. ISSN 0012-9658. PMID 16922314. . [140] Aanena, D. K.; Hoekstra, R. F. (2007). "The evolution of obligate mutualism: if you can't beat 'em, join 'em". Trends in Ecology & Evolution 22 (10): 506–9. doi:10.1016/j.tree.2007.08.007. PMID 17825952. [141] Boucher, D. H.; James, S.; Keeler, K. H. (1982). "The Ecology of Mutualism". Annual Review of Ecology and Systematics 13: 315–347. doi:10.1146/annurev.es.13.110182.001531. [142] Herre, E. A.; Knowlton, N.; Mueller, U. G.; Rehner, S. A. (1999). "The evolution of mutualisms: Exploring the paths between conflict and
cooperation" (http:/ / www. biology. lsu. edu/ webfac/ kharms/ HerreEA_etal_1999_TREE. pdf). Trends in Ecology and Evolution 14 (2): 49–53. doi:10.1016/S0169-5347(98)01529-8. PMID 10234251. .
[143] Gilbert, F. S. (1990). Insect life cycles: genetics, evolution, and co-ordination (http:/ / www. cefe. cnrs. fr/ coev/ pdf/ fk/ Addicot1990. pdf). New York: Springer-Verlag. p. 258. ISBN 0387195505. . [144] Bronstein J.L. 2001. The exploitation of mutualisms. Ecology Letters 4: 277-287. [145] Irwin RE, JL Bronstein, JS Manson, and L Richardson 2010. Nectar Robbing: Ecological and Evolutionary Perspectives. Ann. Rev. Ecol. Evol. Syst. 41: 271-292. [146] Parenti, L. R.; Ebach, M. C. (2009). Comparative biogeography: Discovering and classifying biogeographical patterns of a dynamic Earth.
(http:/ / books. google. com/ ?id=K1GU_1I6bG4C& printsec=frontcover). London, England: University of California Press. ISBN 978-0-520-25945-4. .
[147] Journal of Biogeography (http:/ / www. wiley. com/ bw/ journal. asp?ref=0305-0270) [148] MacArthur, R.; Wilson, E. O. (1967). The Theory of Island Biogeography. Princeton, NJ: Princeton University Press.
[149] Wiens, J. J.; Donoghue, M. J. (2004). "Historical biogeography, ecology and species richness" (http:/ / www. phylodiversity. net/
donoghue/ publications/ MJD_papers/ 2004/ 144_Wiens_TREE04. pdf). Trends in Ecology and Evolution 19 (12): 639–644. doi:10.1016/j.tree.2004.09.011. PMID 16701326. . [150] Croizat, L.; Nelson, G.; Rosen, D. E. (1974). "Centers of Origin and Related Concepts". Systematic Zoology 23 (2): 265–287. doi:10.2307/2412139. JSTOR 2412139. [151] Wiley, E. O. (1988). "Vicariance Biogeography". Annual Review of Ecology and Systematics 19: 513–542. doi:10.1146/annurev.es.19.110188.002501. JSTOR 2097164. [152] Morrone, J. J.; Crisci, J. V. (1995). "Historical Biogeography: Introduction to Methods". Annual Review of Ecology and Systematics 26: 373–401. doi:10.1146/annurev.es.26.110195.002105. [153] Landhäusser, Simon M.; Deshaies, D.; Lieffers, V. J. (2009). "Disturbance facilitates rapid range expansion of aspen into higher elevations of the Rocky Mountains under a warming climate". Journal of Biogeography 37 (1): 68–76. doi:10.1111/j.1365-2699.2009.02182.x. [154] Reznick, D.; Bryant, M. J.; Bashey, F. (2002). "r- and K-Selection Revisited: The Role of Population Regulation in Life-History Evolution"
(http:/ / www2. hawaii. edu/ ~taylor/ z652/ Reznicketal. pdf). Ecology 83 (6): 1509–20. doi:10.1890/0012-9658(2002)083[1509:RAKSRT]2.0.CO;2. ISSN 0012-9658. . [155] Pianka, E. R. (1972). "r and K Selection or b and d Selection?". The American Naturalist 106 (951): 581–588. doi:10.1086/282798.
[156] Molecular Ecology (http:/ / www3. interscience. wiley. com/ journal/ 117989598/ home)
[157] Avise, J. (1994). Molecular Markers, Natural History and Evolution (http:/ / books. google. com/ ?id=2zYnQfnXNr8C& printsec=frontcover). Kluwer Academic Publishers. ISBN 0-412-03771-8. . [158] O'Brian, E.; Dawson, R. (2007). "Context-dependent genetic benefits of extra-pair mate choice in a socially monogamous passerine" (http:/
/ web. unbc. ca/ ~dawsonr/ 2007_bes61_775-782. pdf). Behav Ecol Sociobiol 61 (5): 775–782. doi:10.1007/s00265-006-0308-8. .
[159] Avise, J. (2000). Phylogeography: The History and Formation of Species (http:/ / books. google. com/ ?id=lA7YWH4M8FUC& printsec=frontcover). President and Fellows of Harvard College. ISBN 0-674-66638-0. .
[160] Young, G.L. (1974). "Human ecology as an interdisciplinary concept: A critical inquiry" (http:/ / www. sciencedirect. com/ science/ article/
pii/ S0065250408602779). Advances in Ecological Research. Advances in Ecological Research 8: 1–105. doi:10.1016/S0065-2504(08)60277-9. ISBN 9780120139088. .
[161] Gross, M. (2004). "Human geography and ecological sociology: The unfolding of human ecology, 1890 to 1930 - and beyond" (http:/ / ssh.
dukejournals. org/ cgi/ content/ abstract/ 28/ 4/ 575). Social Science History 28 (4): 575–605. doi:10.1215/01455532-28-4-575. .
[162] Liu, J. et al (2009). "Coupled Human and Natural Systems" (http:/ / ambio. allenpress. com/ archive/ 0044-7447/ 36/ 8/ pdf/
i0044-7447-36-8-639. pdf). AMBIO: A Journal of the Human Environment 36 (8): 639–649. doi:10.1579/0044-7447(2007)36[639:CHANS]2.0.CO;2. ISSN 0044-7447. . [163] Mason, H. L.; Langenheim, J. H. (1957). "Language Analysis and the Concept "Environment"". Ecology 38 (2): 325–340. doi:10.2307/1931693. JSTOR 1931693. [164] Kleese, D. A. (2001). "Nature and nature in Psychology". Journal of Theoretical and Philosophical Psy. 21: 61–79. doi:10.1037/h0091199.
[165] Campbell, Neil A.; Brad Williamson; Robin J. Heyden (2006). Biology: Exploring Life (http:/ / www. phschool. com/ el_marketing. html). Boston, Massachusetts: Pearson Prentice Hall. ISBN 0-13-250882-6. . Ecology 40
[166] Kormondy, E. (1995). Concepts of ecology. (4th ed.). Benjamin Cummings. ISBN 0134781163.
[167] http:/ / zipcodezoo. com/ Glossary/ holocoenotic. asp [168] Billings, W. D. (1952). "The Environmental Complex in Relation to Plant Growth and Distribution". The Quarterly Review of Biology 27 (3): 251–265. doi:10.1086/399022. JSTOR 2813531. PMID 13004274.
[169] Singh, J. S. (2006). "Sustainable development of the Indian Himalayan region: Linking ecological and economic concerns" (http:/ / www.
ias. ac. in/ currsci/ mar252006/ 784. pdf) (PDF). Current Science 90 (6): 784–8. . [170] Marcello, A. (1958). "Climate, plant migration and rhythm". International Journal of Biometeorology 2 (1): 105–107. Bibcode 1958IJBB....2..105M. doi:10.1007/BF02333488.
[171] Hughes, A. R.. "Disturbance and Diversity: An Ecological Chicken and Egg Problem" (http:/ / www. nature. com/ scitable/ knowledge/
library/ disturbance-and-diversity-an-ecological-chicken-and-13256228). Nature Education Knowledge 1 (8): 26. .
[172] Levin, S. A. (1992). "The problem of pattern and scale in ecology: the Robert H. MacArthur Award" (http:/ / biology. ucf. edu/ ~pascencio/
classes/ Spatial Ecology/ Levin. pdf). Ecology 73 (6): 1943–67. doi:10.2307/1941447. JSTOR 1941447. . Retrieved 2010-03-16. [173] Holling, C. S. (1973). "Resilience and Stability of Ecological Systems". Annual Review of Ecology and Systematics 4: 1–23. doi:10.1146/annurev.es.04.110173.000245. JSTOR 2096802. [174] Folke, C.; Carpenter, S.; Walker, B.; Scheffer, M.; Elmqvist, T.; Gunderson, L.; et al., C.S. (2004). "Regime Shifts, Resilience, and Biodiversity in Ecosystem Management". Annual Review of Ecology and Systematics 35: 557–581. doi:10.1146/annurev.ecolsys.35.021103.105711. JSTOR 2096802.
[175] Morgan Ernest, S. K. et al (2003). "Thermodynamic and metabolic effects on the scaling of production and population energy use" (https:/ /
www. msu. edu/ ~maurerb/ Ernest_etal_2003. pdf). Ecology Letters 6 (11): 990–5. doi:10.1046/j.1461-0248.2003.00526.x. . [176] Allègre, Claude J.; Manhès, Gérard; Göpel, Christa (1995). "The age of the Earth". Geochimica et Cosmochimica Acta 59 (8): 1455–1456. Bibcode 1995GeCoA..59.1445A. doi:10.1016/0016-7037(95)00054-4.
[177] Wills, C.; Bada, J. (2001). The Spark of Life: Darwin and the Primeval Soup (http:/ / books. google. com/ ?id=UrGqxy0wMdkC&
dq=The+ Spark+ of+ Life:+ Darwin+ and+ the+ Primeval+ Soup& printsec=frontcover). Cambridge, Massachusetts: Perseus Publishing. ISBN 9780738204932. .
[178] Goldblatt, C.; Lenton, T. M.; Watson, A. J. (2006). "Bistability of atmospheric oxygen and the Great Oxidation" (http:/ / lgmacweb. env.
uea. ac. uk/ ajw/ Reprints/ goldblatt_et_al_2006. pdf). Nature 443 (7112): 683–6. Bibcode 2006Natur.443..683G. doi:10.1038/nature05169. PMID 17036001. .
[179] Catling, D. C.; Claire, M. W. (2005). "How Earth's atmosphere evolved to an oxic state: A status report" (http:/ / www. atmos. washington.
edu/ ~davidc/ papers_mine/ Catling2005-EPSL. pdf). Earth and Planetary Science Letters 237: 1–20. Bibcode 2005E&PSL.237....1C. doi:10.1016/j.epsl.2005.06.013. .
[180] Cronk, J. K.; Fennessy, M. S. (2001). Wetland Plants: Biology and Ecology (http:/ / books. google. com/ ?id=FNI1GFbH2eQC& printsec=frontcover). Washington, D.C.: Lewis Publishers. ISBN 1-56670-372-7. .
[181] Evans, D. H.; Piermarini, P. M.; Potts, W. T. W. (1999). "Ionic Transport in the Fish Gill Epithelium" (http:/ / people. biology. ufl. edu/
devans/ DHEJEZ. pdf). Journal of Experimental Zoology 283 (7): 641–652. doi:10.1002/(SICI)1097-010X(19990601)283:7<641::AID-JEZ3>3.0.CO;2-W. . [182] Swenson, N. G.; Enquist, B. J. (2008). "The relationship between stem and branch wood specific gravity and the ability of each measure to predict leaf area". American Journal of Botany 95 (4): 516–519. doi:10.3732/ajb.95.4.516. PMID 21632377.
[183] Gartner, G. E. A. et al (2010). "Phylogeny, Ecology, and Heart Position in Snakes" (http:/ / www. naherpetology. org/ pdf_files/ 1407. pdf). Physiological and Biochemical Zoology 83 (1): 43–54. doi:10.1086/648509. PMID 19968564. . [184] Jacobsen, D. (2008). "Low oxygen pressure as a driving factor for the altitudinal decline in taxon richness of stream macroinvertebrates". Oecologia 154 (4): 795–807. doi:10.1007/s00442-007-0877-x. PMID 17960424. [185] Wheeler, T. D.; Stroock, A. D. (2008). "The transpiration of water at negative pressures in a synthetic tree". Nature 455 (7210): 208–212. Bibcode 2008Natur.455..208W. doi:10.1038/nature07226. PMID 18784721. [186] Pockman, W. T.; Sperry, J. S.; O'Leary, J. W. (1995). "Sustained and significant negative water pressure in xylem". Nature 378 (6558): 715–716. Bibcode 1995Natur.378..715P. doi:10.1038/378715a0. [187] Zimmermann, U.; Schneider, H.; Wegner, L. H.; Wagner, M.; Szimtenings, A.; Haase, F.; Bentrup, FW (2002). "What are the driving forces for water lifting in the xylem conduit?". Physiologia Plantarum 114 (3): 327–335. doi:10.1034/j.1399-3054.2002.1140301.x. PMID 12060254. [188] Kastak, D.; Schusterman, R. J. (1998). "Low-frequency amphibious hearing in pinnipeds: Methods, measurements, noise, and ecology"
(http:/ / www. sea-inc. net/ resources/ lrni_KastakandSchusterman_JASA_LFpinnipedhearing_1998. pdf). J. Acoust. Soc. Am. 103 (4): 2216–28. Bibcode 1998ASAJ..103.2216K. doi:10.1121/1.421367. PMID 9566340. . [189] Nishiguchi, Y.; Ito, I.; Okada, M. (2010). "Structure and Function of Lactate Dehydrogenase from Hagfish". Mar Drugs. 8 (3): 594–607. doi:10.3390/md8030594. PMC 2857353. PMID 20411117.
[190] Friedman, J.; Harder, L. D. (2004). "Inflorescence architecture and wind pollination in six grass species" (http:/ / www. bio. ucalgary. ca/
contact/ faculty/ pdf/ FriedmanHarder2004. pdf). Functional Ecology 18 (6): 851–860. doi:10.1111/j.0269-8463.2004.00921.x. .
[191] Harder, L. D.; Johnson, S. D. (2009). "Darwin's beautiful contrivances: evolutionary and functional evidence for floral adaptation" (http:/ /
www. bio. ucalgary. ca/ contact/ faculty/ pdf/ Harder_Johnson_09. pdf). New Phytologist 183 (3): 530–545. doi:10.1111/j.1469-8137.2009.02914.x. PMID 19552694. . Ecology 41
[192] Shimeta, J.; Jumars, P. A.; Lessard, E. J. (1995). "Influences of turbulence on suspension feeding by planktonic protozoa; experiments in
laminar shear fields" (http:/ / www. aslo. org/ lo/ toc/ vol_40/ issue_5/ 0845. pdf). Limnolology and Oceanography 40 (5): 845–859. doi:10.4319/lo.1995.40.5.0845. .
[193] Etemad-Shahidi, A.; Imberger, J. (2001). "Anatomy of turbulence in thermally stratified lakes" (http:/ / nospam. aslo. org/ lo/ toc/ vol_46/
issue_5/ 1158. pdf). Limnolology and Oceanography 46 (5): 1158–70. doi:10.4319/lo.2001.46.5.1158. . [194] Wolf, B. O.; Walsberg, G. E. (2006). "Thermal Effects of Radiation and Wind on a Small Bird and Implications for Microsite Selection". Ecology 77 (7): 2228–36. doi:10.2307/2265716. JSTOR 2265716. [195] Daubenmire, R. (1975). "Floristic plant geography of eastern Washington and northern Idaho". Journal of Biogeography 2 (1): 1–18. doi:10.2307/3038197. JSTOR 3038197. [196] Steele, C. A.; Carstens, B. C.; Storfer, A.; Sullivan, J. (2005). "Testing hypotheses of speciation timing in Dicamptodon copei and
Dicamptodon aterrimus (Caudata: Dicamptodontidae)" (http:/ / www. lsu. edu/ faculty/ carstens/ pdfs/ Steele. etal. 2005. pdf). Molecular Phylogenetics and Evolution 36 (1): 90–100. doi:10.1016/j.ympev.2004.12.001. PMID 15904859. .
[197] "Photosynthesis and respiration" (http:/ / ecosys. cfl. scf. rncan. gc. ca/ dynamique-dynamic/ respiration-eng. asp). Natural Resources Canada. . Retrieved 4 February 2010.
[198] Lenton, T. M.; Watson, A. (2000). "Redfield revisited 2. What regulates the oxygen content of the atmosphere" (http:/ / lgmacweb. env.
uea. ac. uk/ esmg/ papers/ Redfield_revisited_2. pdf). Global biogeochemical cycles 14 (1): 249–268. Bibcode 2000GBioC..14..249L. doi:10.1029/1999GB900076. .
[199] Lobert, J. M.; Warnatz, J. (1993). Crutzen, P. J.; Goldammer, J. G.. eds. Emissions from the combustion process in vegetation. (http:/ /
jurgenlobert. org/ papers_data/ Lobert. Warnatz. Wiley. 1993. pdf). Wiley. ISBN 0471936049, 9780471936046. . [200] Garren, K. H. (1943). "Effects of Fire on Vegetation of the Southeastern United States". Botanical Review 9 (9): 617–654. doi:10.1007/BF02872506. [201] Cooper, C. F. (1960). "Changes in Vegetation, Structure, and Growth of Southwestern Pine Forests since White Settlement". Ecological Monographs 30 (2): 130–164. JSTOR 1948549. [202] Cooper, C. F. (1961). "The ecology of fire". Scientific American 204 (4): 150–160. doi:10.1038/scientificamerican0461-150.
[203] van Wagtendonk, Jan W. (2007). "History and Evolution of Wildland Fire Use" (http:/ / fireecology. net/ docs/ Journal/ pdf/ Volume03/
Issue02/ 003. pdf) (PDF). Fire Ecology Special Issue 3 (2): 3–17. . Retrieved 23 April 2011. [204] Boerner, R. e. j. (1982). "Fire and Nutrient Cycling in Temperate Ecosystems". BioScience 32 (3): 187–192. doi:10.2307/1308941. JSTOR 1308941. [205] Goubitz, S.; Werger, M. J. A.; Ne'eman, G. (2009). "Germination Response to Fire-Related Factors of Seeds from Non-Serotinous and Serotinous Cones". Plant Ecology 169 (2): 195–204. doi:10.1023/A:1026036332277. [206] Ne'eman, G.; Goubitz, S.; Nathan, R. (2004). "Reproductive Traits of Pinus halepensis in the Light of Fire: A Critical Review". Plant Ecology 171 (1/2): 69–79. doi:10.1023/B:VEGE.0000029380.04821.99. [207] Flematti, Gavin R.; Ghisalberti, Emilio L.; Dixon, Kingsley W.; Trengove, R. D. (2004). "A Compound from Smoke That Promotes Seed
Germination" (http:/ / www. sciencemag. org/ content/ 305/ 5686/ 977. full. pdf?sid=f51e6d8f-5ad8-4a3a-90da-824b5c3a2c58) (PDF). Science 305 (5686): 977. doi:10.1126/science.1099944. PMID 15247439. . [208] Falkowski, P. G.; Fenchel, T.; Delong, E. F. (2008). "The microbial engines that drive Earth's biogeochemical cycles". Science 320 (5879): 1034–9. Bibcode 2008Sci...320.1034F. doi:10.1126/science.1153213. PMID 18497287. [209] Grace, J. (2004). "Understanding and managing the global carbon cycle". Journal of Ecology 92 (2): 189–202. doi:10.1111/j.0022-0477.2004.00874.x.
[210] Pearson, P. N.; Palmer, M. R. (2000). "Atmospheric carbon dioxide concentrations over the past 60 million years" (http:/ / paleolands. com/
pdf/ cenozoicCO2. pdf). Nature 406 (6797): 695–9. doi:10.1038/35021000. PMID 10963587. . [211] Pagani, M. et al (2005). "Marked Decline in Atmospheric Carbon Dioxide Concentrations During the Paleogene". Science 309 (5734): 600–3. Bibcode 2005Sci...309..600P. doi:10.1126/science.1110063. PMID 15961630.
[212] Cox, P. M. et al (2000). "Acceleration of global warming due to carbon-cycle feedbacks in a coupled climate model" (https:/ / www. up.
ethz. ch/ education/ biogeochem_cycles/ reading_list/ cox_etal_nat_00. pdf). Nature 408 (6809): 184–187. doi:10.1038/35041539. PMID 11089968. .
[213] Heimann, Martin; Reichstein, Markus (2008). "Terrestrial ecosystem carbon dynamics and climate feedbacks" (http:/ / courses.
washington. edu/ ocean450/ Discussion_Topics_Papers/ Heinmann_clim_chng_08. pdf). Nature 451 (7176): 289–292. Bibcode 2008Natur.451..289H. doi:10.1038/nature06591. PMID 18202646. . [214] Davidson, Eric A.; Janssens, Ivan A. (2006). "Temperature sensitivity of soil carbon decomposition and feedbacks to climate change". Nature 440 (7081): 165–173. Bibcode 2006Natur.440..165D. doi:10.1038/nature04514. PMID 16525463.
[215] Zhuan, Q. et al (2007). "Net emission of CH and CO in Alaska: Implications for the region's greenhouse gas budget" (http:/ / picea. sel. 4 2
uaf. edu/ manuscripts/ zhuang07-ea. pdf). Ecological Applications 17 (1): 203–212. doi:10.1890/1051-0761(2007)017[0203:NEOCAC]2.0.CO;2. ISSN 1051-0761. PMID 17479846. .
[216] Egerton, F. N. (2001). "A History of the Ecological Sciences: Early Greek Origins" (http:/ / esapubs. org/ bulletin/ current/ history_list/
history_part1. pdf) (PDF). Bulletin of the Ecological Society of America 82 (1): 93–7. .
[217] Benson, K. R. (2000). "The emergence of ecology from natural history" (http:/ / web. cena. usp. br/ apostilas/ Plinio/ Disc CENA 0109
Ecol Geral 2010/ benson2000. pdf). Endeavor 24 (2): 59–62. doi:10.1016/S0160-9327(99)01260-0. PMID 10969480. . Ecology 42
[218] Rosenzweig, M.L. (2003). "Reconciliation ecology and the future of species diversity" (http:/ / eebweb. arizona. edu/ COURSES/ Ecol302/
Lectures/ ORYXRosenzweig. pdf) (PDF). Oryx 37 (2): 194–205. . [219] Hawkins, B. A. (2001). "Ecology's oldest pattern". Endeavor 25 (3): 133. doi:10.1016/S0160-9327(00)01369-7.
[220] Kingsland, S. (2004). "Conveying the intellectual challenge of ecology: an historical perspective" (http:/ / www. isa. utl. pt/ dbeb/ ensino/
txtapoio/ HistEcology. pdf). Frontiers in Ecology and the Environment 2 (7): 367–374. doi:10.1890/1540-9295(2004)002[0367:CTICOE]2.0.CO;2. ISSN 1540-9295. . [221] McIntosh 1985 [222] Stauffer, R. C. (1957). "Haeckel, Darwin and ecology". The Quarterly Review of Biology 32 (2): 138–144. doi:10.1086/401754. [223] Friederichs, K. (1958). "A Definition of Ecology and Some Thoughts About Basic Concepts". Ecology 39 (1): 154–159. doi:10.2307/1929981. JSTOR 1929981.
[224] Esbjorn-Hargens, S. (2005). "Integral Ecology: An Ecology of Perspectives" (http:/ / www. vancouver. wsu. edu/ fac/ tissot/
IU_Ecology_Intro. pdf) (PDF). Journal of Integral Theory and Practice 1 (1): 2–37. . [225] Hinchman, L. P.; Hinchman, S. K. (2007). "What we owe the Romantics". Environmental Values 16 (3): 333–354. doi:10.3197/096327107X228382. [226] Goodland, R. J. (1975). "The Tropical Origin of Ecology: Eugen Warming's Jubilee". Oikos 26 (2): 240–5. doi:10.2307/3543715. JSTOR 3543715. [227] Kormandy, E. J.; Wooster, Donald (1978). "Review: Ecology/Economy of Nature—Synonyms?". Ecology 59 (6): 1292–4. doi:10.2307/1938247. JSTOR 1938247. [228] Hughes, J. D. (1985). "Theophrastus as Ecologist". Environmental Review 9 (4): 296–306. doi:10.2307/3984460. JSTOR 3984460.
[229] Hughes, J. D. (1975). "Ecology in ancient Greece" (http:/ / www. informaworld. com/ smpp/ content~db=all~content=a902027058). Inquiry 18 (2): 115–125. doi:10.1080/00201747508601756. . [230] Hector, A.; Hooper, R. (2002). "Darwin and the First Ecological Experiment". Science 295 (5555): 639–640. doi:10.1126/science.1064815. PMID 11809960. [231] Sinclair, G. (1826). "On cultivating a collection of grasses in pleasure-grounds or flower-gardens, and on the utility of studying the
Gramineae." (http:/ / books. google. com/ ?id=fF0CAAAAYAAJ& pg=PA230). London Gardener's Magazine (New-Street-Square: A. & R. Spottiswoode) 1: p. 115. . [232] Benson, Keith R. (2000). "The emergence of ecology from natural history". Endeavour 24 (2): 59–62. doi:10.1016/S0160-9327(99)01260-0. PMID 10969480.
[233] Darwin, Charles (1859). On the Origin of Species (http:/ / darwin-online. org. uk/ content/ frameset?itemID=F373& viewtype=text& pageseq=16) (1st ed.). London: John Murray. p. 1. ISBN 0801413192. .
[234] Meysman, f. j. r.; Middelburg, Jack J.; Heip, C. H. R. (2006). "Bioturbation: a fresh look at Darwin's last idea" (http:/ / www. marbee.
fmns. rug. nl/ pdf/ marbee/ 2006-Meysman-TREE. pdf). TRENDS in Ecology and Evolution 21 (22): 688–695. doi:10.1016/j.tree.2006.08.002. PMID 16901581. . [235] Acot, P. (1997). "The Lamarckian Cradle of Scientific Ecology". Acta Biotheoretica 45 (3–4): 185–193. doi:10.1023/A:1000631103244.
[236] Forbes, S. (1887). "The lake as a microcosm" (http:/ / www. uam. es/ personal_pdi/ ciencias/ scasado/ documentos/ Forbes. PDF). Bull. of the Scientific Association (Peoria, IL): 77–87. . [237] May, R. (1999). "Unanswered questions in ecology". Phil. Trans. R. Soc. Lond. B. 354 (1392): 1951–1959. doi:10.1098/rstb.1999.0534. PMC 1692702. PMID 10670015. [238] Clements 1905 [239] Simberloff, D. (1980). "A succession of paradigms in ecology: Essentialism to materialism and probalism". Synthese 43: 3–39. doi:10.1007/BF00413854.
[240] Gleason, H. A. (1926). "The Individualistic Concept of the Plant Association" (http:/ / www. ecologia. unam. mx/ laboratorios/
comunidades/ pdf/ pdf curso posgrado Elena/ Tema 1/ gleason1926. pdf). Bulletin of the Torrey Botanical Club 53 (1): 7–26. doi:10.2307/2479933. JSTOR 2479933. . [241] Foster, J. B.; Clark, B. (2008). "The Sociology of Ecology: Ecological Organicism Versus Ecosystem Ecology in the Social Construction
of Ecological Science, 1926-1935" (http:/ / ibcperu. nuxit. net/ doc/ isis/ 10408. pdf). Organization & Environment 21 (3): 311–352. doi:10.1177/1086026608321632. . [242] Allee, W. C. (1932). Animal life and social growth. Baltimore: The Williams & Wilkins Company and Associates. [243] Ghilarov, A. M. (1995). "Vernadsky's Biosphere Concept: An Historical Perspective". The Quarterly Review of Biology 70 (2): 193–203. doi:10.1086/418982. JSTOR 3036242. [244] Itô, Y. (1991). "Development of ecology in Japan, with special reference to the role of Kinji Imanishi". Journal of Ecological Research 6 (2): 139–155. doi:10.1007/BF02347158. Ecology 43
Further reading
Introductory
• Beman, J. (2010). "Energy economics in ecosystems" (http:/ / www. nature. com/ scitable/ knowledge/ library/ energy-economics-in-ecosystems-13254442). Nature Education Knowledge 1 (8): 22.
• Bryant, P. J.. Biodiversity and Conservation. A Hypertext Book. (http:/ / darwin. bio. uci. edu/ ~sustain/ bio65/
Titlpage. htm).
• Cleland, E. E. (2011). "Biodiversity and Ecosystem Stability" (http:/ / www. nature. com/ scitable/ knowledge/
library/ biodiversity-and-ecosystem-stability-17059965). Nature Education Knowledge 2 (1): 2. • Costanza, R.; Cumberland, J. H.; Daily, H.; Goodland, R.; Norgaard, R. B. (2007). An Introduction to Ecological
Economics (e-book). (http:/ / www. eoearth. org/ article/ An_Introduction_to_Ecological_Economics_(e-book)). St. Lucie Press and International Society for Ecological Economics.
• "Ecosystem Services: A Primer." (http:/ / www. actionbioscience. org/ environment/ esa. html). Ecological Society of America. 2000.
• Farabee, M. J.. The Online Biology Book. (http:/ / www2. estrellamountain. edu/ faculty/ farabee/ biobk/
biobooktoc. html). Avondale, Arizona: Estrella Mountain Community College.
• Forseth, I. (2010). "Terrestrial Biomes" (http:/ / www. nature. com/ scitable/ knowledge/ library/ terrestrial-biomes-13236757). Nature Education Knowledge 1 (8): 12.
• Henkel, T. P. (2010). "Coral reefs" (http:/ / www. nature. com/ scitable/ knowledge/ library/ coral-reefs-15786954). Nature Education Knowledge 1 (11): 5.
• McCabe, D. J. (2010). "Rivers and streams: Life in flowing water" (http:/ / www. nature. com/ scitable/
knowledge/ library/ rivers-and-streams-life-in-flowing-water-16819919). Nature Education Knowledge 1 (12): 4.
• Odum, H. (1973). "Energy, ecology, and economics" (http:/ / movimientotransicion. pbworks. com/ f/ IN+ -+
EnergÃa,+ economÃa+ y+ redistribución. pdf) (PDF). Ambio 2 (6): 220–227.
• Stevens, A. (2010). "Earth's varying climate" (http:/ / www. nature. com/ scitable/ knowledge/ library/ earth-s-varying-climate-13368032). Nature Education Knowledge 1 (8): 45.
• Stevens, A. (2010). "Predation, herbivory, and parasitism" (http:/ / www. nature. com/ scitable/ knowledge/
library/ predation-herbivory-and-parasitism-13261134). Nature Education Knowledge 1 (8): 38.
Advanced • Brand, F. S.; Jax, K. (2007). "Focusing the meaning(s) of resilience: resilience as a descriptive concept and a
boundary object" (http:/ / www. ecologyandsociety. org/ vol12/ iss1/ art23/ ). Ecology and Society 12 (1): 23. • Carpenter, S. R.; Mooney, H. A.; Agard, J.; Capistrano, D.; DeFries, R. S.; Díaz, S.; Dietz, T.; Duraiappah, A. K.
et al (2009). "Science for managing ecosystem services: Beyond the Millennium Ecosystem Assessment" (http:/ /
www. azoresbioportal. angra. uac. pt/ files/ publicacoes_CARPENTER09_ScienceForEcosystemServices. pdf. pdf) (PDF). Proceedings of the National Academy of Sciences 106 (5): 1305–1312. Bibcode 2009PNAS..106.1305C. doi:10.1073/pnas.0808772106.
• Ettema, C.H.; Wardle, D.A. (2002). "Spatial soil ecology" (http:/ / www. ese. u-psud. fr/ epc/ conservation/ PDFs/
ettema. pdf) (PDF). Trends in Ecology & Evolution 17 (4): 177–183. doi:10.1016/S0169-5347(02)02496-5.
• Getz, W.M. (2009). "Disease and the dynamics of food webs" (http:/ / www. plosbiology. org/ article/
citationList. action?articleURI=info:doi/ 10. 1371/ journal. pbio. 1000209). PLoS Biol 7 (9): e1000209. doi:10.1371/journal.pbio.1000209. • Gotelli, N.J.; Ellison, A.M. (2006). "Food-Web models predict species abundances in response to habitat change"
(http:/ / www. plosbiology. org/ article/ info:doi/ 10. 1371/ journal. pbio. 0040324). PLoS Biol 4 (10): e324. doi:10.1371/journal.pbio.0040324. • Green, J.L.; Hastings, A.; Arzberger, P.; Ayala, F.; Cottingham, K.L.; Cuddington, K.; Davis, F.; Dunne, J.A. et al (2005). "Complexity in ecology and conservation: mathematical, statistical, and computational challenges" (http:/ Ecology 44
/ biology. uoregon. edu/ people/ green/ publications/ Green et al. 2005 Bioscience. pdf) (PDF). BioScience 55 (6): 501–510. doi:10.1641/0006-3568(2005)055[0501:CIEACM]2.0.CO;2. ISSN 0006-3568.
• Hanski, I. (1998). "Metapopulation dynamics" (http:/ / www. helsinki. fi/ ~ihanski/ Articles/ Nature 1998 Hanski. pdf) (PDF). Nature 396 (6706): 41–49. Bibcode 1998Natur.396...41H. doi:10.1038/23876. • Heneghan, L.; Coleman, D. C.; Zou, X.; Crossley, D. A.; Haines, B. L. (1999). "Soil microarthropod
contributions to decomposition dynamics: Tropical-temperate comparisons of a single substrate" (http:/ / cwt33.
ecology. uga. edu/ publications/ pubs_no_citations/ heneghan_98_microarthropod. pdf) (PDF). Ecology 80: 1873–1882. • Laland, K. N.; Odling-Smee, J.; Feldman, M. W. (2000). "Niche construction, biological evolution, and cultural
change" (http:/ / www. cs. helsinki. fi/ group/ cosco/ Teaching/ CoscoSeminar/ spring2007/ articles/ laland-2000. pdf) (PDF). Behavioral and Brain Sciences 23: 131–175. doi:10.1017/S0140525X00002417. • Magurran, A. E., & Henderson, P. A. 2010. Temporal turnover and the maintenance of diversity in ecological assemblages. Philosophical Transactions of the Royal Society B: Biological Sciences, 365(1558):3611-3620
(http:/ / rstb. royalsocietypublishing. org/ content/ 365/ 1558/ 3611. full. pdf+ html)
• Peterson, G.; Allen, C. R.; Holling, C. S. (1998). "Ecological resilience, biodiversity, and scale" (http:/ / www.
geog. mcgill. ca/ faculty/ peterson/ PDF-myfiles/ BioDEcoFn. pdf) (PDF). Ecosystems 1: 6–18. doi:10.1007/s100219900002.
• Quinn, J. F.; Dunham, A. E. (1983). "On hypothesis testing in ecology and evolution" (http:/ / www. usm. maine.
edu/ bio/ courses/ bio621/ on_hypothesis_testing. pdf) (PDF). The American Naturalist 122 (5): 602–617. doi:10.1086/284161.
• Saccheri, I.; Hanski, I. (2006). "Natural selection and population dynamics" (http:/ / www. helsinki. fi/ ~ihanski/
Articles/ TREE 2006 Saccheri & Hanski. pdf) (PDF). Trends in Ecology and Evolution 21 (6): 341–347. doi:10.1016/j.tree.2006.03.018. PMID 16769435.
• Simberloff, D. S. (1974). "Equilibrium theory of island biogeography and ecology" (http:/ / www. clas. ufl. edu/
users/ mbinford/ GEOXXXX_Biogeography/ LiteratureForLinks/ Simberloff_1974_ETIB_annurev. es. 05.
110174. pdf) (PDF). Annual Review of Ecology and Systematics 5 (1): 161–182. doi:10.1146/annurev.es.05.110174.001113.
• Wiens, J. J.; Donoghue, M. J. (2004). "Historical biogeography, ecology and species richness" (http:/ / life. bio.
sunysb. edu/ ee/ wienslab/ wienspdfs/ 2004/ WiensDonoghueTREE. pdf) (PDF). Trends in Ecology & Evolution 19 (12): 639–644. doi:10.1016/j.tree.2004.09.011. PMID 16701326. • Womack, A. M.; Bohannan, B. J. M.; Green, J. L. (2010). "Biodiversity and biogeography of the atmosphere"
(http:/ / rstb. royalsocietypublishing. org/ content/ 365/ 1558/ 3645. full. pdf+ html). Philosophical Transactions of the Royal Society B: Biological Sciences 365 (1558): 3645–3653. doi:10.1098/rstb.2010.0283.
External links
• Ecology (Stanford Encyclopedia of Philosophy) (http:/ / plato. stanford. edu/ entries/ ecology/ )
• The Nature Education Knowledge Project: Ecology (http:/ / www. nature. com/ scitable/ knowledge/ ecology-102)
• Ecology Journals List of ecological scientific journals (http:/ / ekolojinet. com/ journals. html)
• Ecology Dictionary - Explanation of Ecological Terms (http:/ / ecologydictionary. org)
• Canadian Society for Ecology and Evolution (http:/ / www. ecoevo. ca/ en/ index. htm)
• Ecological Society of America (http:/ / www. esa. org/ )
• Ecology Global Network (http:/ / ecology. com/ )
• Ecological Society of Australia (http:/ / www. ecolsoc. org. au/ )
• British Ecological Society (http:/ / www. britishecologicalsociety. org/ )
• Ecological Society of China (http:/ / english. rcees. cas. cn/ sp/ zgstxxh/ )
• International Society for Ecological Economics (http:/ / www. ecoeco. org/ content/ ) Ecology 45
• (http:/ / www. europeanecology. org/ ) European Ecological Federation
• UN Millennium Ecosystem Assessment (http:/ / www. maweb. org/ en/ index. aspx)
• The Encyclopedia of Earth – Wilderness: Biology & Ecology (http:/ / www. eoearth. org/ topics/ view/ 49660/ )
• Ecology and Society - A journal of integrative science for resilience and sustainability (http:/ / www.
ecologyandsociety. org/ ) • National Pesticide Information Center (United States)- Follow these steps to report an environmental incident
(wildlife, air, soil or water) (http:/ / npic. orst. edu/ reportprob. html#env)
• Science Aid: Ecology (http:/ / scienceaid. co. uk/ biology/ ecology/ index. html) U.K. High School (GCSE, Alevel) Ecology
Global warming
Global mean land-ocean temperature change from 1880–2011, relative to the 1951–1980 mean. The black line is the annual mean and the red line is [1] the 5-year running mean. The green bars show uncertainty estimates. Source: NASA GISS
The map shows the 10-year average (2000–2009) global mean temperature anomaly relative to the 1951–1980 mean. The largest temperature [2] increases are in the Arctic and the Antarctic Peninsula. Source: NASA Earth Observatory
Fossil fuel related CO2 emissions compared to five of IPCC's emissions scenarios. The dips are related to global recessions. Data from IPCC SRES [3] [4] scenarios ; Data spreadsheet included with International Energy Agency's "CO2 Emissions from Fuel Combustion 2010 – Highlights" ; and [5] Supplemental IEA data . Image source: Skeptical Science
Global warming is the rising average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's average surface temperature has increased by about 0.8 °C (unknown operator: u'strong' °F), with about two thirds of the increase occurring since 1980.[6] Warming of the climate system is unequivocal, and scientists are more than 90% certain that most of it is caused by increasing concentrations of greenhouse gases produced by human activities such as deforestation and the burning of fossil Global warming 46
fuels.[7][8][9][10] These findings are recognized by the national science academies of all major industrialized nations.[11][A] Climate model projections are summarized in the 2007 Fourth Assessment Report (AR4) by the Intergovernmental Panel on Climate Change (IPCC). They indicate that during the 21st century the global surface temperature is likely to rise a further 1.1 to 2.9 °C (2 to 5.2 °F) for their lowest emissions scenario and 2.4 to 6.4 °C (4.3 to 11.5 °F) for their highest.[12] The ranges of these estimates arise from the use of models with differing sensitivity to greenhouse gas concentrations.[13][14] An increase in global temperature will cause sea levels to rise and will change the amount and pattern of precipitation, and a probable expansion of subtropical deserts.[15] Warming is expected to be strongest in the Arctic and would be associated with continuing retreat of glaciers, permafrost and sea ice. Other likely effects of the warming include more frequent occurrence of extreme-weather events including heat waves, droughts and heavy rainfall, species extinctions due to shifting temperature regimes, and changes in crop yields. Warming and related changes will vary from region to region around the globe, with projections being more robust in some areas than others.[16] If global mean temperature increases to 4 °C (unknown operator: u'strong' °F) above preindustrial levels, the limits for human adaptation are likely to be exceeded in many parts of the world, while the limits for adaptation for natural systems would largely be exceeded throughout the world. Hence, the ecosystem services upon which human livelihoods depend would not be preserved.[17] Most countries are parties to the United Nations Framework Convention on Climate Change (UNFCCC),[18] whose ultimate objective is to prevent dangerous anthropogenic (i.e., human-induced) climate change.[19] Parties to the UNFCCC have adopted a range of policies designed to reduce greenhouse gas emissions[20]:10[21][22][23]:9 and to assist in adaptation to global warming.[20]:13[23]:10[24][25] Parties to the UNFCCC have agreed that deep cuts in emissions are required,[26] and that future global warming should be limited to below 2.0 °C (unknown operator: u'strong' °F) relative to the pre-industrial level.[26][B] A 2011 report of analyses by the United Nations Environment Programme[27] and International Energy Agency[28] suggest that efforts as of the early 21st century to reduce emissions may be inadequately stringent to meet the UNFCCC's 2 °C target.
Observed temperature changes
Evidence for warming of the climate system includes observed increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level.[29][30][31] The Earth's average surface temperature, expressed as a linear trend, rose by 0.74 ± 0.18 °C over the period 1906–2005. The rate of warming over the last half of that period was almost double that for the period as a whole (0.13 ± 0.03 °C per decade, versus 0.07 ± 0.02 °C per decade). The urban heat island effect is very small, estimated to account for less than 0.002 °C of warming per decade since 1900.[32] Two millennia of mean surface temperatures Temperatures in the lower troposphere have increased between 0.13 according to different reconstructions from and 0.22 °C (0.22 and 0.4 °F) per decade since 1979, according to climate proxies, each smoothed on a decadal satellite temperature measurements. Climate proxies show the scale, with the instrumental temperature record temperature to have been relatively stable over the one or two thousand overlaid in black. years before 1850, with regionally varying fluctuations such as the Medieval Warm Period and the Little Ice Age.[33]
Recent estimates by NASA's Goddard Institute for Space Studies (GISS) and the National Climatic Data Center show that 2005 and 2010 tied for the planet's warmest year since reliable, widespread instrumental measurements became available in the late 19th century, exceeding 1998 by a few hundredths of a degree.[34][35][36] Estimates by Global warming 47
the Climatic Research Unit (CRU) show 2005 as the second warmest year, behind 1998 with 2003 and 2010 tied for third warmest year, however, "the error estimate for individual years ... is at least ten times larger than the differences between these three years."[37] The World Meteorological Organization (WMO) statement on the status of the global climate in 2010 explains that, "The 2010 nominal value of 0.53 °C ranks just ahead of those of 2005 (0.52 °C) and 1998 (0.51 °C), although the differences between the three years are not statistically significant..."[38] Temperatures in 1998 were unusually warm because global temperatures are affected by the El Niño-Southern Oscillation (ENSO), and the strongest El Niño in the past century occurred during that year.[39] Global temperature is subject to short-term fluctuations that overlay long term trends and can temporarily mask them. The relative stability in temperature from 2002 to 2009 is consistent with such an episode.[40][41] 2010 was also an El Niño year. On the low swing of the oscillation, 2011 as an La Niña year was cooler but it was still the 11th warmest year since records began in 1880. Of the 13 warmest years NOAA graph of Global Annual Temperature since 1880, 11 were the years from 2001 to 2011. Over the more recent Anomalies 1950–2011, showing the El record, 2011 was the warmest La Niña year in the period from 1950 to Niño-Southern Oscillation 2011, and was close to 1997 which was not at the lowest point of the cycle.[42]
Temperature changes vary over the globe. Since 1979, land temperatures have increased about twice as fast as ocean temperatures (0.25 °C per decade against 0.13 °C per decade).[43] Ocean temperatures increase more slowly than land temperatures because of the larger effective heat capacity of the oceans and because the ocean loses more heat by evaporation.[44] The Northern Hemisphere warms faster than the Southern Hemisphere because it has more land and because it has extensive areas of seasonal snow and sea-ice cover subject to ice-albedo feedback. Although more greenhouse gases are emitted in the Northern than Southern Hemisphere this does not contribute to the difference in warming because the major greenhouse gases persist long enough to mix between hemispheres.[45]
The thermal inertia of the oceans and slow responses of other indirect effects mean that climate can take centuries or longer to adjust to changes in forcing. Climate commitment studies indicate that even if greenhouse gases were stabilized at 2000 levels, a further warming of about 0.5 °C (0.9 °F) would still occur.[46]
Initial causes of temperature changes (external forcings)
Greenhouse effect schematic showing energy flows between space, the atmosphere, and earth's surface. Energy exchanges are expressed in watts per square meter (W/m2). Global warming 48
This graph, known as the Keeling Curve, shows the increase of atmospheric carbon dioxide (CO ) concentrations from 1958–2008. Monthly CO 2 2 measurements display seasonal oscillations in an upward trend; each year's maximum occurs during the Northern Hemisphere's late spring, and declines during its growing season as plants remove some atmospheric CO . 2
External forcing refers to processes external to the climate system (though not necessarily external to Earth) that influence climate. Climate responds to several types of external forcing, such as radiative forcing due to changes in atmospheric composition (mainly greenhouse gas concentrations), changes in solar luminosity, volcanic eruptions, and variations in Earth's orbit around the Sun.[47]:0 Attribution of recent climate change focuses on the first three types of forcing. Orbital cycles vary slowly over tens of thousands of years and at present are in an overall cooling trend which would be expected to lead towards an ice age, but the 20th century instrumental temperature record shows a sudden rise in global temperatures.[48]
Greenhouse gases The greenhouse effect is the process by which absorption and emission of infrared radiation by gases in the atmosphere warm a planet's lower atmosphere and surface. It was proposed by Joseph Fourier in 1824 and was first investigated quantitatively by Svante Arrhenius in 1896.[49] Naturally occurring amounts of greenhouse gases have a mean warming effect of about 33 °C (unknown operator: u'strong' °F).[50][C] The major greenhouse gases are water vapor, which causes about 36–70% of the greenhouse effect; carbon dioxide (CO ), which causes 9–26%; methane (CH ), which causes 4–9%; and ozone (O ), which 2 4 3 causes 3–7%.[51][52][53] Clouds also affect the radiation balance through cloud forcings similar to greenhouse gases. Human activity since the Industrial Revolution has increased the amount of greenhouse gases in the atmosphere, leading to increased radiative forcing from CO , methane, tropospheric ozone, CFCs and nitrous oxide. The 2 concentrations of CO and methane have increased by 36% and 148% respectively since 1750.[54] These levels are 2 much higher than at any time during the last 800,000 years, the period for which reliable data has been extracted from ice cores.[55][56][57][58] Less direct geological evidence indicates that CO values higher than this were last seen 2 about 20 million years ago.[59] Fossil fuel burning has produced about three-quarters of the increase in CO from 2 human activity over the past 20 years. The rest of this increase is caused mostly by changes in land-use, particularly deforestation.[60]
Per capita greenhouse gas emissions in 2005, including land-use change.
Total greenhouse gas emissions in 2005, including land-use change.
Over the last three decades of the 20th century, gross domestic product per capita and population growth were the main drivers of increases in greenhouse gas emissions.[61] CO emissions are continuing to rise due to the burning of 2 fossil fuels and land-use change.[62][63]:71 Emissions can be attributed to different regions. The two figures opposite show annual greenhouse gas emissions for the year 2005, including land-use change. Attribution of emissions due to land-use change is a controversial issue.[64][65]:289 Global warming 49
Emissions scenarios, estimates of changes in future emission levels of greenhouse gases, have been projected that depend upon uncertain economic, sociological, technological, and natural developments.[66] In most scenarios, emissions continue to rise over the century, while in a few, emissions are reduced.[67][68] Fossil fuel reserves are abundant, and will not limit carbon emissions in the 21st century.[69] Emission scenarios, combined with modelling of the carbon cycle, have been used to produce estimates of how atmospheric concentrations of greenhouse gases might change in the future. Using the six IPCC SRES "marker" scenarios, models suggest that by the year 2100, the atmospheric concentration of CO could range between 541 and 970 ppm.[70] This is an increase of 90–250% above 2 the concentration in the year 1750. The popular media and the public often confuse global warming with ozone depletion, i.e., the destruction of stratospheric ozone by chlorofluorocarbons.[71][72] Although there are a few areas of linkage, the relationship between the two is not strong. Reduced stratospheric ozone has had a slight cooling influence on surface temperatures, while increased tropospheric ozone has had a somewhat larger warming effect.[73]
Particulates and soot
Global dimming, a gradual reduction in the amount of global direct irradiance at the Earth's surface, was observed from 1961 until at least 1990.[74] The main cause of this dimming is particulates produced by volcanoes and human made pollutants, which exerts a cooling effect by increasing the reflection of incoming sunlight. The effects of the products of fossil fuel combustion – CO and aerosols – have largely 2 offset one another in recent decades, so that net warming has been due to the increase in non-CO greenhouse gases such as methane.[75] 2 Radiative forcing due to particulates is temporally limited due to wet Ship tracks over the Atlantic Ocean on the east deposition which causes them to have an atmospheric lifetime of one coast of the United States. The climatic impacts from particulate forcing could have a large effect week. Carbon dioxide has a lifetime of a century or more, and as such, on climate through the indirect effect. changes in particulate concentrations will only delay climate changes due to carbon dioxide.[76]
In addition to their direct effect by scattering and absorbing solar radiation, particulates have indirect effects on the radiation budget.[77] Sulfates act as cloud condensation nuclei and thus lead to clouds that have more and smaller cloud droplets. These clouds reflect solar radiation more efficiently than clouds with fewer and larger droplets, known as the Twomey effect.[78] This effect also causes droplets to be of more uniform size, which reduces growth of raindrops and makes the cloud more reflective to incoming sunlight, known as the Albrecht effect.[79] Indirect effects are most noticeable in marine stratiform clouds, and have very little radiative effect on convective clouds. Indirect effects of particulates represent the largest uncertainty in radiative forcing.[80]
Soot may cool or warm the surface, depending on whether it is airborne or deposited. Atmospheric soot directly absorb solar radiation, which heats the atmosphere and cools the surface. In isolated areas with high soot production, such as rural India, as much as 50% of surface warming due to greenhouse gases may be masked by atmospheric brown clouds.[81] When deposited, especially on glaciers or on ice in arctic regions, the lower surface albedo can also directly heat the surface.[82] The influences of particulates, including black carbon, are most pronounced in the tropics and sub-tropics, particularly in Asia, while the effects of greenhouse gases are dominant in the extratropics and southern hemisphere.[83] Global warming 50
Solar activity
Solar variations causing changes in solar radiation energy reaching the Earth have been the cause of past climate changes.[84] The effect of changes in solar forcing in recent decades is uncertain, but small, with some studies showing a slight cooling effect,[85] while others studies suggest a slight warming effect.[47][86][87][88] Greenhouse gases and solar forcing affect temperatures in different ways. While both increased solar activity and increased greenhouse Satellite observations of Total Solar Irradiance gases are expected to warm the troposphere, an increase in solar from 1979–2006. activity should warm the stratosphere while an increase in greenhouse gases should cool the stratosphere.[47] Radiosonde (weather balloon) data show the stratosphere has cooled over the period since observations began (1958), though there is greater uncertainty in the early radiosonde record. Satellite observations, which have been available since 1979, also show cooling.[89]
A related hypothesis, proposed by Henrik Svensmark, is that magnetic activity of the sun deflects cosmic rays that may influence the generation of cloud condensation nuclei and thereby affect the climate.[90] Other research has found no relation between warming in recent decades and cosmic rays.[91][92] The influence of cosmic rays on cloud cover is about a factor of 100 lower than needed to explain the observed changes in clouds or to be a significant contributor to present-day climate change.[93] Studies in 2011 have indicated that solar activity may be slowing, and that the next solar cycle could be delayed. To what extent is not yet clear; Solar Cycle 25 is due to start in 2020, but may be delayed to 2022 or even longer. It is even possible that Sol could be heading towards another Maunder Minimum. While there is not yet a definitive link between solar sunspot activity and global temperatures, the scientists conducting the solar activity study believe that global greenhouse gas emissions would prevent any possible cold snap.[94] “The fact we still see a positive imbalance despite the prolonged solar minimum isn't a surprise given what we've learned about the climate system...But it's worth noting, because this provides unequivocal evidence that the sun is not the dominant driver of global [95] warming. ” In line with other details mentioned above, director of NASA's Goddard Institute for Space Studies James Hansen says that the sun is not nearly the biggest factor in global warming. Discussing the fact that low amounts of solar activity between 2005 and 2010 had hardly any effect on global warming, Hansen says it is more evidence that greenhouse gases are the largest culprit; that is, he supports the theory advanced by "nearly all climate scientists" including the IPCC.[95]
Feedback Feedback is a process in which changing one quantity changes a second quantity, and the change in the second quantity in turn changes the first. Positive feedback increases the change in the first quantity while negative feedback reduces it. Feedback is important in the study of global warming because it may amplify or diminish the effect of a particular process. The main positive feedback in the climate system is the water vapor feedback. The main negative feedback is radiative cooling through the Stefan–Boltzmann law, which increases as the fourth power of temperature. Positive and negative feedbacks are not imposed as assumptions in the models, but are instead emergent properties that result from the interactions of basic dynamical and thermodynamic processes. A wide range of potential feedback processes exist, such as Arctic methane release and ice-albedo feedback. Consequentially, potential tipping points may exist, which may have the potential to cause abrupt climate change.[96] Global warming 51
For example, the "emission scenarios" used by IPCC in its 2007 report primarily examined greenhouse gas emissions from human sources. In 2011, a joint study by the US National Snow and Ice Data Center and National Oceanic and Atmospheric Administration calculated the additional greenhouse gas emissions that would emanate from melted and decomposing permafrost, even if policymakers attempt to reduce human emissions from the A1FI scenario to the A1B scenario.[97] The team found that even at the much lower level of human emissions, permafrost thawing and decomposition would still result in 190 Gt C of permafrost carbon being added to the atmosphere on top of the human sources. Importantly, the team made three extremely conservative assumptions: (1) that policymakers will embrace the A1B scenario instead of the A1FI scenario, (2) that all of the carbon would be released as carbon dioxide instead of methane, which is more likely and over a 20 year lifetime has 72x the greenhouse warming power of CO , and (3) their model did not project additional temperature rise caused by the release of these additional 2 gases.[97][98] These very conservative permafrost carbon dioxide emissions are equivalent to about 1/2 of all carbon released from fossil fuel burning since the dawn of the Industrial Age,[99] and is enough to raise atmospheric concentrations by an additional 87 ± 29 ppm, beyond human emissions. Once initiated, permafrost carbon forcing (PCF) is irreversible, is strong compared to other global sources and sinks of atmospheric CO , and due to thermal 2 inertia will continue for many years even if atmospheric warming stops.[97] A great deal of this permafrost carbon is actually being released as highly flammable methane instead of carbon dioxide.[100] IPCC 2007's temperature projections did not take any of the permafrost carbon emissions into account and therefore underestimate the degree of expected climate change.[97][98] Other research published in 2011 found that increased emissions of methane could instigate significant feedbacks that amplify the warming attributable to the methane alone. The researchers found that a 2.5-fold increase in methane emissions would cause indirect effects that increase the warming 250% above that of the methane alone. For a 5.2-fold increase, the indirect effects would be 400% of the warming from the methane alone.[101]
Climate models
Calculations of global warming prepared in or before 2001 from a range of climate models under the SRES A2 emissions scenario, which assumes no action is taken to reduce emissions and regionally divided economic development.
The geographic distribution of surface warming during the 21st century calculated by the HadCM3 climate model if a business as usual scenario is assumed for economic growth and greenhouse gas emissions. In this figure, the globally averaged warming corresponds to 3.0 °C (5.4 °F).
A climate model is a computerized representation of the five components of the climate system: Atmosphere, hydrosphere, cryosphere, land surface, and biosphere.[102] Such models are based on physical principles including fluid dynamics, thermodynamics and radiative transfer. There can be components which represent air movement, temperature, clouds, and other atmospheric properties; ocean temperature, salt content, and circulation; ice cover on land and sea; the transfer of heat and moisture from soil and vegetation to the atmosphere; chemical and biological processes; and others. Although researchers attempt to include as many processes as possible, simplifications of the actual climate system are inevitable because of the constraints of available computer power and limitations in knowledge of the climate system. Results from models can also vary due to different greenhouse gas inputs and the model's climate sensitivity. For example, the uncertainty in IPCC's 2007 projections is caused by (1) the use of multiple models with differing Global warming 52
sensitivity to greenhouse gas concentrations, (2) the use of differing estimates of humanities' future greenhouse gas emissions, (3) any additional emissions from climate feedbacks that were not included in the models IPCC used to prepare its report, i.e., greenhouse gas releases from permafrost.[97] The models do not assume the climate will warm due to increasing levels of greenhouse gases. Instead the models predict how greenhouse gases will interact with radiative transfer and other physical processes. One of the mathematical results of these complex equations is a prediction whether warming or cooling will occur.[103] Recent research has called special attention to the need to refine models with respect to the effect of clouds[104] and the carbon cycle.[105][106][107] Models are also used to help investigate the causes of recent climate change by comparing the observed changes to those that the models project from various natural and human-derived causes. Although these models do not unambiguously attribute the warming that occurred from approximately 1910 to 1945 to either natural variation or human effects, they do indicate that the warming since 1970 is dominated by man-made greenhouse gas emissions.[47] The physical realism of models is tested by examining their ability to simulate contemporary or past climates.[108] Climate models produce a good match to observations of global temperature changes over the last century, but do not simulate all aspects of climate.[109] Not all effects of global warming are accurately predicted by the climate models used by the IPCC. Observed Arctic shrinkage has been faster than that predicted.[110] Precipitation increased proportional to atmospheric humidity, and hence significantly faster than global climate models predict.[111][112]
Expected environmental effects "Detection" is the process of demonstrating that climate has changed in some defined statistical sense, without providing a reason for that change. Detection does not imply attribution of the detected change to a particular cause. "Attribution" of causes of climate change is the process of establishing the most likely causes for the detected change with some defined level of confidence.[113] Detection and attribution may also be applied to observed changes in physical, ecological and social systems.[114]
Natural systems
Global warming has been detected in a number of systems. Some of these changes, e.g., based on the instrumental temperature record, have been described in the section on temperature changes. Rising sea levels and observed decreases in snow and ice extent are consistent with warming.[115] Most of the increase in global average temperature since the mid-20th century is, with high probability,[D] attributable to human-induced changes in greenhouse gas concentrations.[116]
Sparse records indicate that glaciers have been retreating since the early 1800s. In Even with policies to reduce emissions, the 1950s measurements began that allow the monitoring of glacial mass balance, global emissions are still expected to reported to the World Glacier Monitoring Service (WGMS) and the National Snow continue to grow over time.[117] and Ice Data Center (NSIDC) Global warming 53
In the IPCC Fourth Assessment Report, across a range of future emission scenarios, model-based estimates of sea level rise for the end of the 21st century (the year 2090–2099, relative to 1980–1999) range from 0.18 to 0.59 m. These estimates, however, were not given a likelihood due to a lack of scientific understanding, nor was an upper bound given for sea level rise. On the timescale of centuries to millennia, the melting of ice sheets could result in even higher sea level rise. Partial deglaciation of the Greenland ice sheet, and possibly the West Antarctic Ice Sheet, could contribute 4–6 metres (13 to 20 ft) or more to sea level rise.[118] Changes in regional climate are expected to include greater warming over land, with most warming at high northern latitudes, and least warming over the Southern Ocean and parts of the North Atlantic Ocean.[117] Snow cover area and sea ice extent are expected to decrease, with the Arctic expected to be largely ice-free in September by 2037.[119] The frequency of hot extremes, heat waves, and heavy precipitation will very likely increase.
Ecological systems In terrestrial ecosystems, the earlier timing of spring events, and poleward and upward shifts in plant and animal ranges, have been linked with high confidence to recent warming.[115] Future climate change is expected to particularly affect certain ecosystems, including tundra, mangroves, and coral reefs.[117] It is expected that most ecosystems will be affected by higher atmospheric CO levels, combined with higher global temperatures.[120] 2 Overall, it is expected that climate change will result in the extinction of many species and reduced diversity of ecosystems.[121] Dissolved CO2 increases ocean acidity. This decreases the amount of carbonate ions, which organisms at the base of the marine food chain, such as foraminifera, use to make structures they need to survive. The current rate of acidification is many times faster than at least the past 300 million years, which included four mass extinctions that involved rising ocean acidity. By the end of the century, acidity changes since the industrial revolution would match the Palaeocene-Eocene Thermal Maximum, which occurred over 5000 years and killed 35-50% of benthic foraminifera.[122]
Expected social system effects Vulnerability of human societies to climate change mainly lies in the effects of extreme-weather events rather than gradual climate change.[123] Impacts of climate change so far include adverse effects on small islands,[124] adverse effects on indigenous populations in high-latitude areas,[125] and small but discernable effects on human health.[126] Over the 21st century, climate change is likely to adversely affect hundreds of millions of people through increased coastal flooding, reductions in water supplies, increased malnutrition and increased health impacts.[127] Most economic studies suggest losses of world gross domestic product (GDP) for this magnitude of warming.[128][129]
Food security Under present trends, by 2030, rice, millet and maize in South Asia could decrease by up to 10% while maize production in Southern Africa.[130] By 2100, rice and maize yields in the tropics are expected to decrease by 20-40% because of higher temperatures while the population of three billion is expected to double. This does not account for the decrease in yields as a result of soil moisture and water supplies stressed by rising temperatures. [131] Future warming of around 3 °C (by 2100, relative to 1990–2000) could result in increased crop yields in mid- and high-latitude areas, but in low-latitude areas, yields could decline, increasing the risk of malnutrition.[124] A similar regional pattern of net benefits and costs could occur for economic (market-sector) effects.[126] Warming above 3 °C could result in crop yields falling in temperate regions, leading to a reduction in global food production.[132] Global warming 54
Habitat inundation In small islands and megadeltas, inundation as a result of sea level rise is expected to threaten vital infrastructure and human settlements. [133] [134] This could lead to issues of statelessness for population from countries including the Maldives and Tuvalu[135] and homelessness in countries with low lying areas such as Bangladesh.
Responses to global warming
Mitigation Reducing the amount of future climate change is called mitigation of climate change. The IPCC defines mitigation as activities that reduce greenhouse gas (GHG) emissions, or enhance the capacity of carbon sinks to absorb GHGs from the atmosphere.[136] Many countries, both developing and developed, are aiming to use cleaner, less polluting, technologies.[63]:192 Use of these technologies aids mitigation and could result in substantial reductions in CO 2 emissions. Policies include targets for emissions reductions, increased use of renewable energy, and increased energy efficiency. Studies indicate substantial potential for future reductions in emissions.[137] In order to limit warming to within the lower range described in the IPCC's "Summary Report for Policymakers"[138] it will be necessary to adopt policies that will limit greenhouse gas emissions to one of several significantly different scenarios described in the full report.[139] This will become more and more difficult with each year of increasing volumes of emissions and even more drastic measures will be required in later years to stabilize a desired atmospheric concentration of greenhouse gases. Energy-related carbon-dioxide (CO2) emissions in 2010 were the highest in history, breaking the prior record set in 2008.[140] Since even in the most optimistic scenario, fossil fuels are going to be used for years to come, mitigation may also involve carbon capture and storage, a process that traps CO produced by factories and gas or coal power stations 2 and then stores it, usually underground.[141]
Adaptation Other policy responses include adaptation to climate change. Adaptation to climate change may be planned, either in reaction to or anticipation of climate change, or spontaneous, i.e., without government intervention.[142] The ability to adapt is closely linked to social and economic development.[137] Even societies with high capacities to adapt are still vulnerable to climate change. Planned adaptation is already occurring on a limited basis. The barriers, limits, and costs of future adaptation are not fully understood.
Views on global warming There are different views over what the appropriate policy response to climate change should be.[143] These competing views weigh the benefits of limiting emissions of greenhouse gases against the costs. In general, it seems likely that climate change will impose greater damages and risks in poorer regions.[144]
Global warming controversy The global warming controversy refers to a variety of disputes, significantly more pronounced in the popular media than in the scientific literature,[145][146] regarding the nature, causes, and consequences of global warming. The disputed issues include the causes of increased global average air temperature, especially since the mid-20th century, whether this warming trend is unprecedented or within normal climatic variations, whether humankind has contributed significantly to it, and whether the increase is wholly or partially an artifact of poor measurements. Additional disputes concern estimates of climate sensitivity, predictions of additional warming, and what the consequences of global warming will be. Global warming 55
In the scientific literature, there is a strong consensus that global surface temperatures have increased in recent decades and that the trend is caused mainly by human-induced emissions of greenhouse gases. No scientific body of national or international standing disagrees with this view,[147][148] though a few organisations hold non-committal positions. From 1990–1997 in the United States, conservative think tanks mobilized to undermine the legitimacy of global warming as a social problem. They challenged the scientific evidence; argued that global warming will have benefits; and asserted that proposed solutions would do more harm than good.[149]
Politics
Most countries are Parties to the United Nations Framework Convention on Climate Change (UNFCCC).[152] The ultimate objective of the Convention is to prevent dangerous human interference of the climate system.[153] As is stated in the Convention, this requires that GHG concentrations are stabilized in the atmosphere at a level where ecosystems can adapt naturally to climate change, food production is not threatened, and economic development can proceed in a sustainable fashion.[154] The Framework Convention was agreed in 1992, but since then, global emissions have risen.[155] During negotiations, the G77 (a lobbying group in the United Nations representing 133 developing nations)[156]:4 pushed for a mandate requiring developed countries to "[take] the lead" in reducing their emissions.[157] This was justified on the basis that: the developed world's emissions had contributed most to the stock of GHGs in the atmosphere; per-capita emissions (i.e., emissions per head of population) were still relatively low in developing countries; and the Article 2 of the UN Framework Convention refers explicitly to "stabilization of greenhouse emissions of developing countries would grow to meet their [150] [65]:290 gas concentrations." In order to stabilize the development needs. This mandate was sustained in the Kyoto atmospheric concentration of CO , emissions [65]:290 2 Protocol to the Framework Convention, which entered into legal worldwide would need to be dramatically reduced [151] effect in 2005.[158] from their present level.
In ratifying the Kyoto Protocol, most developed countries accepted legally binding commitments to limit their emissions. These first-round commitments expire in 2012.[158] US President George W. Bush rejected the treaty on the basis that "it exempts 80% of the world, including major population centers such as China and India, from compliance, and would cause serious harm to the US economy."[156]:5 At the 15th UNFCCC Conference of the Parties, held in 2009 at Copenhagen, several UNFCCC Parties produced the Copenhagen Accord.[159] Parties associated with the Accord (140 countries, as of November 2010)[160]:9 aim to limit the future increase in global mean temperature to below 2 °C.[161] A preliminary assessment published in November 2010 by the United Nations Environment Programme (UNEP) suggests a possible "emissions gap" between the voluntary pledges made in the Accord and the emissions cuts necessary to have a "likely" (greater than 66% probability) chance of meeting the 2 °C objective.[160]:10–14 The UNEP assessment takes the 2 °C objective as being measured against the pre-industrial global mean temperature level. To having a likely chance of meeting the 2 °C objective, assessed studies generally indicated the need for global emissions to peak before 2020, with substantial declines in emissions thereafter. The 16th Conference of the Parties (COP16) was held at Cancún in 2010. It produced an agreement, not a binding treaty, that the Parties should take urgent action to reduce greenhouse gas emissions to meet a goal of limiting global warming to 2 °C above pre-industrial temperatures. It also recognized the need to consider strengthening the goal to Global warming 56
a global average rise of 1.5 °C.[162]
Public opinion
In 2007–2008 Gallup Polls surveyed 127 countries. Over a third of the world's population was unaware of global warming, with people in developing countries less aware than those in developed, and those in Africa the least aware. Of those aware, Latin America leads in belief that temperature changes are a result of human activities while Africa, parts of Asia and the Middle East, and a few countries from the Former Soviet Union lead in the opposite belief.[164] In the Western world, opinions over the concept and the appropriate responses are divided.
Nick Pidgeon of Cardiff University said that "results show the different Based on Rasmussen polling of 1,000 adults in [163] stages of engagement about global warming on each side of the the USA conducted 29–30 July 2011. Atlantic", adding, "The debate in Europe is about what action needs to be taken, while many in the US still debate whether climate change is happening."[165][166] A 2010 poll by the Office of National Statistics found that 75% of UK respondents were at least "fairly convinced" that the world's climate is changing, compared to 87% in a similar survey in 2006.[167] A January 2011 ICM poll in the UK found 83% of respondents viewed climate change as a current or imminent threat, while 14% said it was no threat. Opinion was unchanged from an August 2009 poll asking the same question, though there had been a slight polarisation of opposing views.[168]
A survey in October, 2009 by the Pew Research Center for the People & the Press showed decreasing public perception in the US that global warming was a serious problem. All political persuasions showed reduced concern with lowest concern among Republicans, only 35% of whom considered there to be solid evidence of global warming.[169] The cause of this marked difference in public opinion between the US and the global public is uncertain but the hypothesis has been advanced that clearer communication by scientists both directly and through the media would be helpful in adequately informing the American public of the scientific consensus and the basis for it.[170] The US public appears to be unaware of the extent of scientific consensus regarding the issue, with 59% believing that scientists disagree "significantly" on global warming.[171] By 2010, with 111 countries surveyed, Gallup determined that there was a substantial decrease in the number of Americans and Europeans who viewed Global Warming as a serious threat. In the US, a little over half the population (53%) now viewed it as a serious concern for either themselves or their families; this was 10% below the 2008 poll (63%). Latin America had the biggest rise in concern, with 73% saying global warming was a serious threat to their families.[172] That global poll also found that people are more likely to attribute global warming to human activities than to natural causes, except in the USA where nearly half (47%) of the population attributed global warming to natural causes.[173] On the other hand, in May 2011 a joint poll by Yale and George Mason Universities found that nearly half the people in the USA (47%) attribute global warming to human activities, compared to 36% blaming it on natural causes. Only 5% of the 35% who were "disengaged", "doubtful", or "dismissive" of global warming were aware that 97% of publishing US climate scientists agree global warming is happening and is primarily caused by humans.[174] Researchers at the University of Michigan have found that the public's belief as to the causes of global warming depends on the wording choice used in the polls.[175] In the United States, according to the Public Policy Institute of California's (PPIC) eleventh annual survey on environmental policy issues, 75% said they believe global warming is a very serious or somewhat serious threat to the economy and quality of life in California.[176] Global warming 57
A July 2011 Rasmussen Reports poll found that 69% of adults in the USA believe it is at least somewhat likely that some scientists have falsified global warming research.[163] A September 2011 Angus Reid Public Opinion poll found that Britons (43%) are less likely than Americans (49%) or Canadians (52%) to say that "global warming is a fact and is mostly caused by emissions from vehicles and industrial facilities." The same poll found that 20% of Americans, 20% of Britons and 14% of Canadians think "global warming is a theory that has not yet been proven."[177]
Other views Most scientists agree that humans are contributing to observed climate change.[62][178] National science academies have called on world leaders for policies to cut global emissions.[179] However, some scientists and non-scientists question aspects of climate-change science.[178][180][181] Organizations such as the libertarian Competitive Enterprise Institute, conservative commentators, and some companies such as ExxonMobil have challenged IPCC climate change scenarios, funded scientists who disagree with the scientific consensus, and provided their own projections of the economic cost of stricter controls.[182][183][184][185] In the finance industry, Deutsche Bank has set up an institutional climate change investment division (DBCCA),[186] which has commissioned and published research[187] on the issues and debate surrounding global warming.[188] Environmental organizations and public figures have emphasized changes in the climate and the risks they entail, while promoting adaptation to changes in infrastructural needs and emissions reductions.[189] Some fossil fuel companies have scaled back their efforts in recent years,[190] or called for policies to reduce global warming.[191]
Etymology The term global warming was probably first used in its modern sense on 8 August 1975 in a science paper by Wally Broecker in the journal Science called "Are we on the brink of a pronounced global warming?".[192][193][194] Broecker's choice of words was new and represented a significant recognition that the climate was warming; previously the phrasing used by scientists was "inadvertent climate modification," because while it was recognized humans could change the climate, no one was sure which direction it was going.[195] The National Academy of Sciences first used global warming in a 1979 paper called the Charney Report, which said: "if carbon dioxide continues to increase, [we find] no reason to doubt that climate changes will result and no reason to believe that these changes will be negligible."[196] The report made a distinction between referring to surface temperature changes as global warming, while referring to other changes caused by increased CO as climate change.[195] 2 Global warming became more widely popular after 1988 when NASA climate scientist James Hansen used the term in a testimony to Congress.[195] He said: "global warming has reached a level such that we can ascribe with a high degree of confidence a cause and effect relationship between the greenhouse effect and the observed warming."[197] His testimony was widely reported and afterward global warming was commonly used by the press and in public discourse.[195]
Notes A. ^ The 2001 joint statement was signed by the national academies of science of Australia, Belgium, Brazil, Canada, the Caribbean, the People's Republic of China, France, Germany, India, Indonesia, Ireland, Italy, Malaysia, New Zealand, Sweden, and the UK.[198] The 2005 statement added Japan, Russia, and the U.S. The 2007 statement added Mexico and South Africa. The Network of African Science Academies, and the Polish Academy of Sciences have issued separate statements. Professional scientific societies include American Astronomical Society, American Chemical Society, American Geophysical Union, American Institute of Physics, American Meteorological Society, American Physical Society, American Quaternary Association, Australian Global warming 58
Meteorological and Oceanographic Society, Canadian Foundation for Climate and Atmospheric Sciences, Canadian Meteorological and Oceanographic Society, European Academy of Sciences and Arts, European Geosciences Union, European Science Foundation, Geological Society of America, Geological Society of Australia, Geological Society of London-Stratigraphy Commission, InterAcademy Council, International Union of Geodesy and Geophysics, International Union for Quaternary Research, National Association of Geoscience Teachers [199], National Research Council (US), Royal Meteorological Society, and World Meteorological Organization. B. ^ Earth has already experienced almost 1/2 of the 2.0 °C (unknown operator: u'strong' °F) described in the Cancun Agreement. In the last 100 years, Earth's average surface temperature increased by about 0.8 °C (unknown operator: u'strong' °F) with about two thirds of the increase occurring over just the last three decades.[6] C. ^ Note that the greenhouse effect produces an average worldwide temperature increase of about 33 °C (unknown operator: u'strong' °F) compared to black body predictions without the greenhouse effect, not an average surface temperature of 33 °C (unknown operator: u'strong' °F). The average worldwide surface temperature is about 14 °C (unknown operator: u'strong' °F). D. [50] E. ^ In the IPCC Fourth Assessment Report, published in 2007, this attribution is given a probability of greater than 90%, based on expert judgement.[200] According to the US National Research Council Report – Understanding and Responding to Climate Change – published in 2008, "[most] scientists agree that the warming in recent decades has been caused primarily by human activities that have increased the amount of greenhouse gases in the atmosphere."[62]
Citations
[1] http:/ / data. giss. nasa. gov/ gistemp/
[2] 2009 Ends Warmest Decade on Record (http:/ / earthobservatory. nasa. gov/ IOTD/ view. php?id=42392). NASA Earth Observatory Image of the Day, 22 January 2010.
[3] http:/ / www. ipcc. ch/ ipccreports/ sres/ emission/ data/ allscen. xls
[4] http:/ / www. iea. org/ co2highlights/ co2Highlights. XLS
[5] http:/ / www. guardian. co. uk/ environment/ 2011/ may/ 29/ carbon-emissions-nuclearpower
[6] America's Climate Choices (http:/ / www. nap. edu/ openbook. php?record_id=12781& page=1). Washington, D.C.: The National Academies Press. 2011. p. 15. ISBN 978-0-309-14585-5. . "The average temperature of the Earth’s surface increased by about 1.4 °F (0.8 °C) over the past 100 years, with about 1.0 °F (0.6 °C) of this warming occurring over just the past three decades" [7] "Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean
temperatures, widespread melting of snow and ice and rising global average sea level." IPCC, Synthesis Report (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ syr/ en/ main. html), Section 1.1: Observations of climate change (http:/ / www. ipcc. ch/ publications_and_data/
ar4/ syr/ en/ mains1. html), in IPCC AR4 SYR 2007. [8] "Three different approaches are used to describe uncertainties each with a distinct form of language. * * * Where uncertainty in specific outcomes is assessed using expert judgment and statistical analysis of a body of evidence (e.g. observations or model results), then the following likelihood ranges are used to express the assessed probability of occurrence: virtually certain >99%; extremely likely >95%; very
likely >90%...... " IPCC, Synthesis Report (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ main. html), Treatment of Uncertainty
(http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ mainssyr-introduction. html), in IPCC AR4 SYR 2007.
[9] IPCC, Synthesis Report (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ main. html), Section 2.4: Attribution of climate change
(http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ mains2-4. html), in IPCC AR4 SYR 2007. [10] America's Climate Choices: Panel on Advancing the Science of Climate Change; National Research Council (2010). Advancing the Science
of Climate Change (http:/ / www. nap. edu/ catalog. php?record_id=12782). Washington, D.C.: The National Academies Press. ISBN 0-309-14588-0. . "(p1) ... there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations. * * * (p21-22) Some scientific conclusions or theories have been so thoroughly examined and tested, and supported by so many independent observations and results, that their likelihood of subsequently being found to be wrong is vanishingly small. Such conclusions and theories are then regarded as settled facts. This is the case for the conclusions that the Earth system is warming and that much of this warming is very likely due to human activities."
[11] "Joint Science Academies' Statement" (http:/ / nationalacademies. org/ onpi/ 06072005. pdf) (PDF). . Retrieved 9 August 2010. Global warming 59
[12] Meehl et al., Chap. 10: Global Climate Projections (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch10. html), Sec. 10.ES:
Mean Temperature (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch10s10-es-1-mean-temperature. html), in IPCC AR4 WG1 2007. [13] Schneider Von Deimling, Thomas; Held, Ganopolski, Rahmstorf (2006). "Climate sensitivity estimated from ensemble simulations of
glacial climate" (http:/ / citeseerx. ist. psu. edu/ viewdoc/ download?doi=10. 1. 1. 172. 3264& rep=rep1& type=pdf). Climate Dynamics. . Retrieved 20 July 2011.
[14] Meehl et al., Chap. 10: Global Climate Projections (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch10. html), Section 10.5:
Quantifying the Range of Climate Change (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch10s10-5. html), in IPCC AR4 WG1 2007.
[15] Lu, Jian; Vechhi, Gabriel A.; Reichler, Thomas (2007). "Expansion of the Hadley cell under global warming" (http:/ / www. atmos.
berkeley. edu/ ~jchiang/ Class/ Spr07/ Geog257/ Week10/ Lu_Hadley06. pdf) (PDF). Geophysical Research Letters 34 (6): L06805. Bibcode 2007GeoRL..3406805L. doi:10.1029/2006GL028443. .
[16] Solomon et al., Technical Summary (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ts. html), Section TS.5.3: Regional-Scale
Projections (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ tssts-5-3. html), in IPCC AR4 WG1 2007.
[17] Warren, Rachel (Jan 2011). "The role of interactions in a world implementing change adaptation and mitigation solutions to climate" (http:/ /
rsta. royalsocietypublishing. org/ content/ 369/ 1934/ 217. full. pdf+ html). Phil. Trans. R. Soc. A 369 (1934): 217–241. Bibcode 2011RSPTA.369..217W. doi:10.1098/rsta.2010.0271. PMID 21115521. .
[18] United Nations Framework Convention on Climate Change (UNFCCC) (2011), Status of Ratification of the Convention (http:/ / unfccc. int/
essential_background/ convention/ status_of_ratification/ items/ 2631. php), UNFCCC Secretariat: Bonn, Germany: UNFCCC, . Most countries in the world are Parties to the United Nations Framework Convention on Climate Change (UNFCCC), which has adopted the 2 °C target. As of 25 November 2011, there are 195 parties (194 states and 1 regional economic integration organization (the European Union)) to the UNFCCC.
[19] "Article 2" (http:/ / unfccc. int/ essential_background/ convention/ background/ items/ 1353. php). The United Nations Framework Convention on Climate Change.. . "The ultimate objective of this Convention and any related legal instruments that the Conference of the Parties may adopt is to achieve, in accordance with the relevant provisions of the Convention, stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system. Such a level should be achieved within a time-frame sufficient to allow ecosystems to adapt naturally to climate change, to ensure that food production is not threatened and to enable economic development to proceed in a sustainable manner. Such a level should be achieved within a time-frame sufficient to allow ecosystems to adapt naturally to climate change, to ensure that food production is not threatened and to enable economic development to proceed in a sustainable manner", excerpt from the founding international treaty which entered into force on 21 March 1994. [20] United Nations Framework Convention on Climate Change (UNFCCC) (2005) (PDF), Sixth compilation and synthesis of initial national
communications from Parties not included in Annex I to the Convention. Note by the secretariat. Executive summary. (http:/ / unfccc. int/
resource/ docs/ 2005/ sbi/ eng/ 18. pdf), Geneva (Switzerland): United Nations Office at Geneva,
[21] Gupta, S. et al. 13.2 Climate change and other related policies (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ ch13s13-2-1. html), in IPCC AR4 WG3 2007.
[22] International Energy Agency (IEA) (2009) (PDF), World Energy Outlook 2009 (http:/ / www. iea. org/ textbase/ nppdf/ free/ 2009/
weo2009. pdf), Paris, France: IEA, pp. 173–184, ISBN 978-92-64-06130-9, [23] United Nations Framework Convention on Climate Change (UNFCCC) (2011) (PDF), Compilation and synthesis of fifth national
communications. Executive summary. Note by the secretariat. (http:/ / unfccc. int/ resource/ docs/ 2011/ sbi/ eng/ inf01. pdf), Geneva (Switzerland): United Nations Office at Geneva,
[24] Adger, et al., Chapter 17: Assessment of adaptation practices, options, constraints and capacity, (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch17. html) Executive summary (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/
ch17s17-es. html), in IPCC AR4 WG2 2007.
[25] 6. Generating the funding needed for mitigation and adaptation (PDF) (http:/ / siteresources. worldbank. org/ INTWDR2010/ Resources/
5287678-1226014527953/ Chapter-6. pdf), in World Bank (2010), World Development Report 2010: Development and Climate Change (http:/
/ econ. worldbank. org/ WBSITE/ EXTERNAL/ EXTDEC/ EXTRESEARCH/ EXTWDRS/ EXTWDR2010/
0,,contentMDK:21969137~menuPK:5287816~pagePK:64167689~piPK:64167673~theSitePK:5287741,00. html), Washington DC, USA: The International Bank for Reconstruction and Development / The World Bank, pp. 262–263, [26] United Nations Framework Convention on Climate Change (UNFCCC) (2011) (PDF), Conference of the Parties – Sixteenth Session: Decision 1/CP.16: The Cancun Agreements: Outcome of the work of the Ad Hoc Working Group on Long-term Cooperative Action under the
Convention (English): Paragraph 4 (http:/ / unfccc. int/ resource/ docs/ 2010/ cop16/ eng/ 07a01. pdf#page=2), UNFCCC Secretariat: Bonn, Germany: UNFCCC, p. 3, "(...) deep cuts in global greenhouse gas emissions are required according to science, and as documented in the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, with a view to reducing global greenhouse gas emissions so as to hold the increase in global average temperature below 2 °C above preindustrial levels"
[27] United Nations Environment Programme (UNEP) (November 2011), "Executive Summary" (http:/ / www. unep. org/ pdf/
UNEP_bridging_gap. pdf) (PDF), Bridging the Emissions Gap: A UNEP Synthesis Report, Nairobi, Kenya: UNEP, p. 8, ISBN 978-92-807-3229-0, UNEP Stock Number: DEW/1470/NA
[28] International Energy Agency (IEA) (2011), "Executive Summary (English)" (http:/ / www. worldenergyoutlook. org/ docs/ weo2011/
executive_summary. pdf) (PDF), World Energy Outlook 2011, Paris, France: IEA, p. 2, Global warming 60
[29] "Climate Change: A Summary of the Science (Sept 2010)" (http:/ / royalsociety. org/ WorkArea/ DownloadAsset. aspx?id=4294972963) (PDF). Royal Society (UK). .
[30] USGRCP (n.d.). "Key Findings. On (website): Global Climate Change Impacts in the United States" (http:/ / www. globalchange. gov/
publications/ reports/ scientific-assessments/ us-impacts/ key-findings). U.S. Global Change Research Program website. . Retrieved 17 April 2010.
[31] IPCC, Summary for Policymakers, Chapter 1: Observed changes in climate and their effects (http:/ / www. ipcc. ch/ publications_and_data/
ar4/ syr/ en/ spms1. html), in IPCC AR4 SYR 2007.
[32] Trenberth et al., Ch. 3, Observations: Atmospheric Surface and Climate Change (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/
en/ ch3. html), Section 3.2.2.2: Urban Heat Islands and Land Use Effects (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/
ch3s3-2-2-2. html), p. 244 (http:/ / www. ipcc. ch/ pdf/ assessment-report/ ar4/ wg1/ ar4-wg1-chapter3. pdf), in IPCC AR4 WG1 2007.
[33] Jansen et al., Ch. 6, Palaeoclimate (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch6. html), Section 6.6.1.1: What Do
Reconstructions Based on Palaeoclimatic Proxies Show? (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch6s6-6. html#6-6-1),
pp. 466–478 (http:/ / www. ipcc-wg1. unibe. ch/ publications/ wg1-ar4/ ar4-wg1-chapter6. pdf), in IPCC AR4 WG1 2007.
[34] Cole, Steve; Leslie McCarthy. "NASA – NASA Research Finds 2010 Tied for Warmest Year on Record" (http:/ / www. nasa. gov/ topics/
earth/ features/ 2010-warmest-year. html) (Feature). NASA. . Retrieved 3 March 2011.
[35] Hansen, James E.; et al. (12 January 2006). "Goddard Institute for Space Studies, GISS Surface Temperature Analysis" (http:/ / data. giss.
nasa. gov/ gistemp/ 2005/ ). NASA Goddard Institute for Space Studies. . Retrieved 17 January 2007.
[36] "State of the Climate: Global Analysis for Annual 2009" (http:/ / www. ncdc. noaa. gov/ sotc/ global/ 2009/ 13). 15 January 2010. . Retrieved 3 May 2011.
[37] Jones, Phil. "CRU Information Sheet no. 1: Global Temperature Record" (http:/ / www. cru. uea. ac. uk/ cru/ info/ warming/ ). Climatic Research Unit, School of Environmental Sciences, University of East Anglia. . Retrieved 3 May 2011.
[38] World Meteorological Organization (2011), WMO statement on the status of the global climate in 2010 (http:/ / www. wmo. int/ pages/
prog/ wcp/ wcdmp/ statement/ documents/ 1074_en. pdf), World Meteorological Organization (WMO), [39] Changnon, Stanley A.; Bell, Gerald D. (2000). El Niño, 1997–1998: The Climate Event of the Century. London: Oxford University Press. ISBN 0-19-513552-0. [40] Knight, J.; Kenney, J.J.; Folland, C.; Harris, G.; Jones, G.S.; Palmer, M.; Parker, D.; Scaife, A. et al (August 2009). "Do Global Temperature
Trends Over the Last Decade Falsify Climate Predictions? [in "State of the Climate in 2008" (http:/ / www. metoffice. gov. uk/ media/ pdf/ j/ j/
global_temperatures_09. pdf)"] (PDF). Bull.Amer.Meteor.Soc. 90 (8): S75–S79. . Retrieved 13 August 2011.
[41] Global temperature slowdown – not an end to climate change (http:/ / webarchive. nationalarchives. gov. uk/ + / http:/ www. metoffice. gov.
uk/ climatechange/ policymakers/ policy/ slowdown. html). UK Met Office. . Retrieved 20 March 2011.
[42] "NOAA National Climatic Data Center, State of the Climate: Global Analysis for Annual 2011" (http:/ / www. ncdc. noaa. gov/ sotc/ global/
2011/ 13). NOAA. 19 January 2012. . Retrieved 31 January 2012.
[43] Trenberth et al., Chap 3, Observations: Atmospheric Surface and Climate Change (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/
en/ ch3. html), Executive Summary (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch3s3-es. html), p. 237 (http:/ / www. ipcc.
ch/ pdf/ assessment-report/ ar4/ wg1/ ar4-wg1-chapter3. pdf), in IPCC AR4 WG1 2007. [44] Rowan T. Sutton, Buwen Dong, Jonathan M. Gregory (2007). "Land/sea warming ratio in response to climate change: IPCC AR4 model
results and comparison with observations" (http:/ / www. agu. org/ pubs/ crossref/ 2007/ 2006GL028164. shtml). Geophysical Research Letters 34 (2): L02701. doi:10.1029/2006GL028164. . Retrieved 19 September 2007.
[45] Ehhalt et al., Chapter 4: Atmospheric Chemistry and Greenhouse Gases (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 127. htm), Section
4.2.3.1: Carbon monoxide (CO) and hydrogen (H ) (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 139. htm#4231), p. 256 (http:/ / www. 2
grida. no/ climate/ ipcc_tar/ wg1/ pdf/ TAR-04. pdf), in IPCC TAR WG1 2001.
[46] Meehl, Gerald A.; et al. (18 March 2005). "How Much More Global Warming and Sea Level Rise" (http:/ / www. sciencemag. org/ cgi/
reprint/ 307/ 5716/ 1769. pdf) (PDF). Science 307 (5716): 1769–1772. Bibcode 2005Sci...307.1769M. doi:10.1126/science.1106663. PMID 15774757. . Retrieved 11 February 2007.
[47] [Notes-Hegerl-2001] Hegerl et al., Chapter 9: Understanding and Attributing Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg1/ en/ ch9. html), Section 9.4.1.5: The Influence of Other Anthropogenic and Natural Forcings (http:/ / www.
ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch9s9-4-1-5. html), in IPCC AR4 WG1 2007. "Recent estimates indicate a relatively small combined effect of natural forcings on the global mean temperature evolution of the second half of the 20th century, with a small net cooling
from the combined effects of solar and volcanic forcings." p. 690 (http:/ / www. ipcc. ch/ pdf/ assessment-report/ ar4/ wg1/ ar4-wg1-chapter9. pdf). [48] Kaufman, D.; Schneider, D.; McKay, N.; Ammann, C.; Bradley, R.; Briffa, K.; Miller, G.; Otto-Bliesner, B. et al (2009). "Recent warming reverses long-term arctic cooling". Science 325 (5945): 1236–1239. Bibcode 2009Sci...325.1236K. doi:10.1126/science.1173983. PMID 19729653.
"Arctic Warming Overtakes 2,000 Years of Natural Cooling" (http:/ / www2. ucar. edu/ news/ 846/ arctic-warming-overtakes-2000-years-natural-cooling). UCAR. 3 September 2009. . Retrieved 8 June 2011.
Bello, David (4 September 2009). "Global Warming Reverses Long-Term Arctic Cooling" (http:/ / www. scientificamerican. com/ article. cfm?id=global-warming-reverses-arctic-cooling). Scientific American. . Retrieved 8 June 2011. Mann, M.; Zhang, Z.; Hughes, M.; Bradley, R.; Miller, S.; Rutherford, S.; Ni, F. (2008). "Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia". Proceedings of the National Academy of Sciences of the United States of Global warming 61
America 105 (36): 13252–13257. Bibcode 2008PNAS..10513252M. doi:10.1073/pnas.0805721105. PMC 2527990. PMID 18765811.
[49] Weart, Spencer (2008). "The Carbon Dioxide Greenhouse Effect" (http:/ / www. aip. org/ history/ climate/ co2. htm). The Discovery of Global Warming. American Institute of Physics. . Retrieved 21 April 2009.
[50] Le Treut et al., "Chapter 1: Historical Overview of Climate Change Science" (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/
ch1. html), FAQ 1.1 (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ faq-1-2. html), , p. 97 (http:/ / www. ipcc. ch/ pdf/
assessment-report/ ar4/ wg1/ ar4-wg1-chapter1. pdf), in IPCC AR4 WG1 2007: "To emit 240 W m–2, a surface would have to have a temperature of around −19 °C. This is much colder than the conditions that actually exist at the Earth’s surface (the global mean surface temperature is about 14 °C). Instead, the necessary −19 °C is found at an altitude about 5 km above the surface."
[51] Kiehl, J.T.; Trenberth, K.E. (1997). "Earth's Annual Global Mean Energy Budget" (http:/ / web. archive. org/ web/ 20080624223905/ http:/ /
www. atmo. arizona. edu/ students/ courselinks/ spring04/ atmo451b/ pdf/ RadiationBudget. pdf) (PDF). Bulletin of the American Meteorological Society 78 (2): 197–208. Bibcode 1997BAMS...78..197K. doi:10.1175/1520-0477(1997)078<0197:EAGMEB>2.0.CO;2.
ISSN 1520-0477. Archived from the original (http:/ / www. atmo. arizona. edu/ students/ courselinks/ spring04/ atmo451b/ pdf/
RadiationBudget. pdf) on 24 June 2008. . Retrieved 21 April 2009.
[52] Schmidt, Gavin (6 April 2005). "Water vapour: feedback or forcing?" (http:/ / www. realclimate. org/ index. php?p=142). RealClimate. . Retrieved 21 April 2009.
[53] Russell, Randy (16 May 2007). "The Greenhouse Effect & Greenhouse Gases" (http:/ / www. windows. ucar. edu/ tour/ link=/ earth/
climate/ greenhouse_effect_gases. html& edu=high). University Corporation for Atmospheric Research Windows to the Universe. . Retrieved 27 December 2009.
[54] EPA (2007). "Recent Climate Change: Atmosphere Changes" (http:/ / www. epa. gov/ climatechange/ science/ recentac. html). Climate Change Science Program. United States Environmental Protection Agency. . Retrieved 21 April 2009. [55] Spahni, Renato; et al. (November 2005). "Atmospheric Methane and Nitrous Oxide of the Late Pleistocene from Antarctic Ice Cores". Science 310 (5752): 1317–1321. Bibcode 2005Sci...310.1317S. doi:10.1126/science.1120132. PMID 16311333.
[56] Siegenthaler, Urs; et al. (November 2005). "Stable Carbon Cycle–Climate Relationship During the Late Pleistocene" (http:/ / www.
sciencemag. org/ cgi/ content/ abstract/ 310/ 5752/ 1313) (PDF). Science 310 (5752): 1313–1317. Bibcode 2005Sci...310.1313S. doi:10.1126/science.1120130. PMID 16311332. . Retrieved 25 August 2010.
[57] Petit, J. R.; et al. (3 June 1999). "Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica" (http:/ /
www. daycreek. com/ dc/ images/ 1999. pdf) (PDF). Nature 399 (6735): 429–436. Bibcode 1999Natur.399..429P. doi:10.1038/20859. . Retrieved 27 December 2009. [58] Lüthi, D.; Le Floch, M.; Bereiter, B.; Blunier, T.; Barnola, J. M.; Siegenthaler, U.; Raynaud, D.; Jouzel, J. et al (2008). "High-resolution carbon dioxide concentration record 650,000–800,000 years before present". Nature 453 (7193): 379–382. Bibcode 2008Natur.453..379L. doi:10.1038/nature06949. PMID 18480821. [59] Pearson, PN; Palmer, MR (2000). "Atmospheric carbon dioxide concentrations over the past 60 million years". Nature 406 (6797): 695–699. doi:10.1038/35021000. PMID 10963587.
[60] IPCC, Summary for Policymakers (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 005. htm), Concentrations of atmospheric greenhouse
gases ... (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 006. htm), p. 7 (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ pdf/
WG1_TAR-FRONT. pdf), in IPCC TAR WG1 2001.
[61] Le Treut et al., Chap. 1, Historical Overview of Climate Change Science (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch1.
html), Section 1.3.1.2: Intensities (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ ch1s1-3-1-2. html), in IPCC AR4 WG3 2007.
[62] NRC (2008). "Understanding and Responding to Climate Change" (http:/ / dels. nas. edu/ resources/ static-assets/
materials-based-on-reports/ booklets/ climate_change_2008_final. pdf). Board on Atmospheric Sciences and Climate, US National Academy of Sciences. p. 2. . Retrieved 9 November 2010.
[63] World Bank (2010). World Development Report 2010: Development and Climate Change (http:/ / web. archive. org/ web/ 20100305081236/
http:/ / econ. worldbank. org/ WBSITE/ EXTERNAL/ EXTDEC/ EXTRESEARCH/ EXTWDRS/ EXTWDR2010/
0,,contentMDK:21969137~menuPK:5287816~pagePK:64167689~piPK:64167673~theSitePK:5287741,00. html). The International Bank for Reconstruction and Development / The World Bank, 1818 H Street NW, Washington DC 20433. doi:10.1596/978-0-8213-7987-5.
ISBN 978-0-8213-7987-5. Archived from the original (http:/ / econ. worldbank. org/ WBSITE/ EXTERNAL/ EXTDEC/ EXTRESEARCH/
EXTWDRS/ EXTWDR2010/ 0,,contentMDK:21969137~menuPK:5287816~pagePK:64167689~piPK:64167673~theSitePK:5287741,00. html) on 5 March 2010. . Retrieved 6 April 2010. [64] Banuri et al., Chapter 3: Equity and Social Considerations, Section 3.3.3: Patterns of greenhouse gas emissions, and Box 3.1, pp. 92–93
(http:/ / www. ipcc. ch/ ipccreports/ sar/ wg_III/ ipcc_sar_wg_III_full_report. pdf) in IPCC SAR WG3 1996.
[65] Liverman, D.M. (2008). "Conventions of climate change: constructions of danger and the dispossession of the atmosphere" (http:/ / www.
environment. arizona. edu/ files/ env/ profiles/ liverman/ liverman-2009-jhg. pdf) (PDF). Journal of Historical Geography 35 (2): 279–296. doi:10.1016/j.jhg.2008.08.008. . Retrieved 10 May 2011.
[66] Fisher et al., Chapter 3: Issues related to mitigation in the long-term context (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/
ch3. html), Section 3.1: Emissions scenarios: Issues related to mitigation in the long term context (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg3/ en/ ch3s3-1. html) in IPCC AR4 WG3 2007.
[67] Morita, Chapter 2: Greenhouse Gas Emission Mitigation Scenarios and Implications (http:/ / www. grida. no/ climate/ ipcc_tar/ wg3/ 068.
htm), Section 2.5.1.4: Emissions and Other Results of the SRES Scenarios (http:/ / www. grida. no/ climate/ ipcc_tar/ wg3/ 081. htm#2514), in IPCC TAR WG3 2001. Global warming 62
[68] Rogner et al., Ch. 1: Introduction (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ ch1. html), Figure 1.7 (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg3/ en/ ch1s1-3-2-2. html), in IPCC AR4 WG3 2007.
[69] IPCC, Summary for Policymakers (http:/ / www. grida. no/ climate/ ipcc_tar/ wg3/ 003. htm), Introduction, paragraph 6 (http:/ / www. grida.
no/ climate/ ipcc_tar/ wg3/ 004. htm), in IPCC TAR WG3 2001.
[70] Prentence et al., Chapter 3: The Carbon Cycle and Atmospheric Carbon Dioxide (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 095. htm)
Executive Summary (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 096. htm), in IPCC TAR WG1 2001. [71] Newell, P.J., 2000: Climate for change: non-state actors and the global politics of greenhouse. Cambridge University Press, ISBN 0-521-63250-1.
[72] Talk of the Nation. "Americans Fail the Climate Quiz" (http:/ / www. npr. org/ 2010/ 12/ 03/ 131785444/ Americans-Fail-The-Climate-Quiz). Npr.org. . Retrieved 27 December 2011. [73] Shindell, Drew; Faluvegi, Greg; Lacis, Andrew; Hansen, James; Ruedy, Reto; Aguilar, Elliot (2006). "Role of tropospheric ozone increases in 20th-century climate change". Journal of Geophysical Research 111 (D8): D08302. Bibcode 2006JGRD..11108302S. doi:10.1029/2005JD006348.
[74] Solomon, S, ed. (2007). "3.4.4.2 Surface Radiation" (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch3s3-4-4-2. html). Climate Change 2007: Working Group I: The Physical Science Basis. ISBN 978-0-521-88009-1. . [75] Hansen, J; Sato, M; Ruedy, R; Lacis, A; Oinas, V (2000). "Global warming in the twenty-first century: an alternative scenario". Proc. Natl. Acad. Sci. U.S.A. 97 (18): 9875–80. Bibcode 2000PNAS...97.9875H. doi:10.1073/pnas.170278997. PMC 27611. PMID 10944197. [76] Ramanathan, V.; Carmichael, G. (2008). "Global and regional climate changes due to black carbon". Nature Geosciences 1 (4): 221–227. Bibcode 2008NatGe...1..221R. doi:10.1038/ngeo156.
[77] Lohmann, U. & J. Feichter (2005). "Global indirect aerosol effects: a review" (http:/ / www. atmos-chem-phys. net/ 5/ 715/ 2005/
acp-5-715-2005. html). Atmos. Chem. Phys. 5 (3): 715–737. doi:10.5194/acp-5-715-2005. . [78] Twomey, S. (1977). "Influence of pollution on shortwave albedo of clouds". J. Atmos. Sci. 34 (7): 1149–1152. Bibcode 1977JAtS...34.1149T. doi:10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2. ISSN 1520-0469. PMC 552786. PMID 15749818. [79] Albrecht, B. (1989). "Aerosols, cloud microphysics, and fractional cloudiness". Science 245 (4923): 1227–1239. Bibcode 1989Sci...245.1227A. doi:10.1126/science.245.4923.1227. PMID 17747885.
[80] IPCC, " Aerosols, their Direct and Indirect Effects (http:/ / www. ipcc. ch/ ipccreports/ tar/ wg1/ pdf/ TAR-05. PDF)", pp. 291–292 in IPCC TAR WG1 2001. [81] Ramanathan, V.; Chung, C.; Kim, D.; Bettge, T.; Buja, L.; Kiehl, J.T.; Washington, W.M.; Fu, Q. et al; et al. (2005). "Atmospheric brown
clouds: Impacts on South Asian climate and hydrological cycle" (http:/ / www. pnas. org/ content/ 102/ 15/ 5326. abstract). Proc. Natl. Acad. Sci. 102 (15): 5326–5333. Bibcode 2005PNAS..102.5326R. doi:10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2. PMC 552786. PMID 15749818. .
[82] Ramanathan, V., et al. (2008). "Report Summary" (http:/ / www. rrcap. unep. org/ abc/ impact/ files/ ABC_Report_Summary_Final. pdf) (PDF). Atmospheric Brown Clouds: Regional Assessment Report with Focus on Asia. United Nations Environment Programme. .
[83] Ramanathan, V., et al. (2008). "Part III: Global and Future Implications" (http:/ / www. rrcap. unep. org/ abc/ publication/ Part III. pdf) (PDF). Atmospheric Brown Clouds: Regional Assessment Report with Focus on Asia. United Nations Environment Programme. .
[84] National Research Council (1994). Solar Influences On Global Change (http:/ / books. nap. edu/ openbook. php?record_id=4778& page=R1). Washington, D.C.: National Academy Press. p. 36. ISBN 0-309-05148-7. . [85] Lockwood, Mike; Fröhlich, Claus (8 June 2008). "Recent oppositely directed trends in solar climate forcings and the global mean surface air
temperature. II. Different reconstructions of the total solar irradiance variation and dependence on response time scale" (http:/ / rspa.
royalsocietypublishing. org/ content/ 464/ 2094/ 1367. abstract). Proc. R. Soc. A 464 (2094): 1367–85. Bibcode 2008RSPSA.464.1367L. doi:10.1098/rspa.2007.0347. .
[86] Duffy, Santer and Wigley, " Solar variability does not explain late-20th-century warming (http:/ / www. clas. ufl. edu/ users/ prwaylen/
GEO2200ARTICLES/ Part1/ Solar variability in late 20th century. pdf)" Physics Today, January, 2009, pp 48–49. The authors respond to recent assertions by Nicola Scafetta and Bruce West that solar forcing "might account" for up to about half of 20th-century warming. [87] Hansen, J. (2002). "Climate forcings in Goddard Institute for Space Studies SI2000 simulations". Journal of Geophysical Research 107 (D18): 4347. Bibcode 2002JGRD..107.4347H. doi:10.1029/2001JD001143. [88] Hansen, J. (2005). "Efficacy of climate forcings". Journal of Geophysical Research 110 (D18): D18104. Bibcode 2005JGRD..11018104H. doi:10.1029/2005JD005776. [89] Randel, William J.; Shine, Keith P.; Austin, John; Barnett, John; Claud, Chantal; Gillett, Nathan P.; Keckhut, Philippe; Langematz, Ulrike et al (2009). "An update of observed stratospheric temperature trends". Journal of Geophysical Research 114 (D2): D02107. Bibcode 2009JGRD..11402107R. doi:10.1029/2008JD010421.
[90] Marsh, Nigel; Henrik, Svensmark (November 2000). "Cosmic Rays, Clouds, and Climate" (http:/ / www. dsri. dk/ ~hsv/ SSR_Paper. pdf) (PDF). Space Science Reviews 94 (1–2): 215–230. doi:10.1023/A:1026723423896. . Retrieved 17 April 2007. [91] Lockwood, Mike; Claus Fröhlich (2007). "Recent oppositely directed trends in solar climate forcings and the global mean surface air
temperature" (http:/ / web. archive. org/ web/ 20070926023811/ http:/ / www. pubs. royalsoc. ac. uk/ media/ proceedings_a/ rspa20071880. pdf) (PDF). Proceedings of the Royal Society A 463 (2086): 2447. Bibcode 2007RSPSA.463.2447L. doi:10.1098/rspa.2007.1880. Archived
from the original (http:/ / www. pubs. royalsoc. ac. uk/ media/ proceedings_a/ rspa20071880. pdf) on 26 September 2007. . Retrieved 21 July 2007. "Our results show that the observed rapid rise in global mean temperatures seen after 1985 cannot be ascribed to solar variability, Global warming 63
whichever of the mechanisms is invoked and no matter how much the solar variation is amplified"
[92] T Sloan and A W Wolfendale (2008). "Testing the proposed causal link between cosmic rays and cloud cover" (http:/ / www. iop. org/ EJ/
abstract/ 1748-9326/ 3/ 2/ 024001/ ). Environ. Res. Lett. 3 (2): 024001. Bibcode 2008ERL.....3d4001S. doi:10.1088/1748-9326/3/2/024001. . [93] Pierce, J.R. and P.J. Adams (2009). "Can cosmic rays affect cloud condensation nuclei by altering new particle formation rates?". Geophysical Research Letters 36 (9): L09820. Bibcode 2009GeoRL..3609820P. doi:10.1029/2009GL037946.
[94] Jaggard, Victoria. "Sun Headed Into Hibernation, Solar Studies Predict." (http:/ / news. nationalgeographic. com/ news/ 2011/ 06/
110614-sun-hibernation-solar-cycle-sunspots-space-science/ ) National Geographic News, 14 June 2011.
[95] Live Science.com, "NASA Report: Greenhouse Gases, Not Sun, Driving Warming", Wynne Parry, 01 February 2012 (http:/ / www.
livescience. com/ 18255-solar-cycle-climate-change-warming. html) [96] Lenton, T. M.; Held, H.; Kriegler, E.; Hall, J. W.; Lucht, W.; Rahmstorf, S.; Schellnhuber, H. J. (Feb 2008). "Tipping elements in the Earth's
climate system" (http:/ / www. pnas. org/ cgi/ pmidlookup?view=long& pmid=18258748) (Free full text). Proceedings of the National Academy of Sciences 105 (6): 1786–1793. Bibcode 2008PNAS..105.1786L. doi:10.1073/pnas.0705414105. PMC 2538841. PMID 18258748. . [97] KEVIN SCHAEFER, TINGJUN ZHANG, LORI BRUHWILER, ANDREW P. BARRETT (2011). "Amount and timing of permafrost carbon release in response to climate warming". Tellus Series B 63 (2): 165–180. Bibcode 2011TellB..63..165S. doi:10.1111/j.1600-0889.2011.00527.x. [98] Romm, Joe (17 February 2011). "NSIDC bombshell: Thawing permafrost feedback will turn Arctic from carbon sink to source in the 2020s,
releasing 100 billion tons of carbon by 2100" (http:/ / thinkprogress. org/ romm/ 2011/ 02/ 17/ 207552/
nsidc-thawing-permafrost-will-turn-from-carbon-sink-to-source-in-mid-2020s-releasing-100-billion-tons-of-carbon-by-2100/ ). ThinkProgress. . Retrieved 27 July 2011.
[99] "Thawing permafrost likely will accelerate global warming, study finds" (http:/ / www. sciencedaily. com/ releases/ 2011/ 02/
110216132100. htm). Sciencedaily.com. 17 February 2011. doi:10.1111/j.1600-0889.2011.00527.x. . Retrieved 27 July 2011.
[100] Hunting for methane with Katey Walter Anthony (http:/ / www. youtube. com/ watch?v=YegdEOSQotE). Univ Alaska Fairbanks, Marketing and Communications. . Retrieved 31 May 2011. [101] Isaksen, Ivar S. A.; Michael Gauss, Gunnar Myhre, Katey M. Walter, and Anthony and Carolyn Ruppel (20 April 2011). "Strong
atmospheric chemistry feedback to climate warming from Arctic methane emissions" (http:/ / www. atmos. washington. edu/ academics/
classes/ 2011Q2/ 558/ IsaksenGB2011. pdf). Global Biogeochemical Cycles 25 (2). Bibcode 2011GBioC..25B2002I. doi:10.1029/2010GB003845. .
[102] IPCC, Glossary A-D (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ annexessglossary-a-d. html): "Climate Model", in IPCC AR4 SYR 2007.
[103] Hansen, James (2000). "Climatic Change: Understanding Global Warming" (http:/ / books. google. com/ ?id=sx6DFr8rbpIC& dq=robert+
lanza& printsec=frontcover). In Robert Lanza. One World: The Health & Survival of the Human Species in the 21st century. Health Press (New Mexico). pp. 173–190. ISBN 0-929173-33-3. . Retrieved 18 August 2007.
[104] Stocker et al., Chapter 7: Physical Climate Processes and Feedbacks (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 260. htm), Section
7.2.2: Cloud Processes and Feedbacks (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ 271. htm), in IPCC TAR WG1 2001.
[105] Torn, Margaret; Harte, John (2006). "Missing feedbacks, asymmetric uncertainties, and the underestimation of future warming" (http:/ /
www. agu. org/ pubs/ crossref/ 2006/ 2005GL025540. shtml). Geophysical Research Letters 33 (10): L10703. Bibcode 2006GeoRL..3310703T. doi:10.1029/2005GL025540. . Retrieved 4 March 2007. [106] Harte, John; et al. (2006). "Shifts in plant dominance control carbon-cycle responses to experimental warming and widespread drought"
(http:/ / www. iop. org/ EJ/ article/ 1748-9326/ 1/ 1/ 014001/ erl6_1_014001. html). Environmental Research Letters 1 (1): 014001. Bibcode 2006ERL.....1a4001H. doi:10.1088/1748-9326/1/1/014001. . Retrieved 2 May 2007. [107] Scheffer, Marten; et al. (2006). "Positive feedback between global warming and atmospheric CO2 concentration inferred from past climate
change" (http:/ / www. pik-potsdam. de/ ~victor/ recent/ scheffer_etal_T_CO2_GRL_in_press. pdf). Geophysical Research Letters 33 (10): L10702. Bibcode 2006GeoRL..3310702S. doi:10.1029/2005gl025044. . Retrieved 4 May 2007.
[108] Randall et al., Chapter 8, Climate Models and Their Evaluation (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ ch8. html), Sec. FAQ 8.1 in IPCC AR4 WG1 2007.
[109] IPCC, Technical Summary (http:/ / www. grida. no/ climate/ ipcc_tar/ wg1/ pdf/ WG1_TAR-FRONT. pdf), p. 54, in IPCC TAR WG1 2001. [110] Stroeve, J., et al. (2007). "Arctic sea ice decline: Faster than forecast". Geophysical Research Letters 34 (9): L09501. Bibcode 2007GeoRL..3409501S. doi:10.1029/2007GL029703.
[111] Wentz,FJ, et al. (2007). "How Much More Rain Will Global Warming Bring?" (http:/ / www. sciencemag. org/ cgi/ content/ abstract/ 317/
5835/ 233). Science 317 (5835): 233–5. Bibcode 2007Sci...317..233W. doi:10.1126/science.1140746. PMID 17540863. .
[112] Liepert, Beate G.; Previdi (2009). "Do Models and Observations Disagree on the Rainfall Response to Global Warming?" (http:/ / journals.
ametsoc. org/ doi/ abs/ 10. 1175/ 2008JCLI2472. 1). Journal of Climate 22 (11): 3156. Bibcode 2009JCli...22.3156L. doi:10.1175/2008JCLI2472.1. . "Recently analyzed satellite-derived global precipitation datasets from 1987 to 2006 indicate an increase in global-mean precipitation of 1.1%–1.4% decade−1. This trend corresponds to a hydrological sensitivity (HS) of 7% K−1 of global warming, which is close to the Clausius–Clapeyron (CC) rate expected from the increase in saturation water vapor pressure with temperature. Analysis of two available global ocean evaporation datasets confirms this observed intensification of the atmospheric water cycle. The observed hydrological sensitivity over the past 20-yr period is higher by a factor of 5 than the average HS of 1.4% K−1 simulated in state-of-the-art coupled atmosphere–ocean climate models for the twentieth and twenty-first centuries." Global warming 64
[113] IPCC, Glossary A-D (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ annexessglossary-a-d. html): "Detection and attribution",
in IPCC AR4 WG1 2007. See also Hegerl et al., Section 9.1.2: What are Climate Change Detection and Attribution? (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg1/ en/ ch9s9-1-2. html), in IPCC AR4 WG1 2007.
[114] Rosenzweig et al., Chapter 1: Assessment of Observed Changes and Responses in Natural and Managed Systems (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch1. html) Section 1.2 Methods of detection and attribution of observed changes (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch1s1-2. html), in IPCC AR4 WG2 2007 .
[115] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Section 1:
Observed changes in climate and their effects (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spms1. html), in IPCC AR4 SYR 2007.
[116] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Section 2:
Causes of change (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spms2. html), in IPCC AR4 SYR 2007.
[117] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Section 3:
Projected climate change and its impacts (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spms3. html), in IPCC AR4 SYR 2007.
[118] IPCC, WG2 Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ spm. html), Magnitudes of impact
(http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ spmsspm-c-15-magnitudes-of. html), in IPCC AR4 WG2 2007.
[119] Wang, M; J.E. Overland (2009). "A sea ice free summer Arctic within 30 years?" (http:/ / www. pmel. noaa. gov/ publications/
search_abstract. php?fmContributionNum=3261). Geophys. Res. Lett 36 (7). Bibcode 2009GeoRL..3607502W. doi:10.1029/2009GL037820. . Retrieved 2 May 2011.
[120] Fischlin, et al., Chapter 4: Ecosystems, their Properties, Goods and Services (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/
contents. html), Executive Summary, p. 213 (http:/ / www. ipcc. ch/ pdf/ assessment-report/ ar4/ wg2/ ar4-wg2-chapter4. pdf), in IPCC AR4 WG2 2007. Executive summary not present in on-line text; see pdf.
[121] Schneider et al., Chapter 19: Assessing Key Vulnerabilities and the Risk from Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19. html), Section 19.3.4: Ecosystems and biodiversity (http:/ / www. ipcc. ch/ publications_and_data/
ar4/ wg2/ en/ ch19s19-3-4. html), in IPCC AR4 WG2 2007. [122] Hönisch, Bärbel; Ridgwell, Schmidt, Thomas, Gibbs, Slujis, Zeebe, Kump, Martindale, Greene, Kiessling, Ries, Zachos, Royer, Barker,
Marchitto Jr, Moyer, Pelejero, Ziveri, Foster, Williams (2012). "The Geological record of ocean acidification" (http:/ / www. sciencemag. org/
content/ 335/ 6072/ 1058. abstract). Science. . Retrieved 1 May 2012.
[123] Wilbanks et al., Chapter 7: Industry, Settlement and Society (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ ch7. html),
Executive Summary (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ ch7s7-es. html), in IPCC AR4 WG2 2007.
[124] x Schneider et al., Chapter 19: Assessing Key Vulnerabilities and the Risk from Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19. html), Section 19.3.3: Regional vulnerabilities (http:/ / www. ipcc. ch/ publications_and_data/ ar4/
wg2/ en/ ch19s19-3-3. html), in IPCC AR4 WG2 2007.
[125] Schneider et al., Chapter 19: Assessing Key Vulnerabilities and the Risk from Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19. html), Section 19.3.7: Update on ‘Reasons for Concern’ (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19s19-3-7. html), in IPCC AR4 WG2 2007.
[126] x Schneider et al., Chapter 19: Assessing Key Vulnerabilities and the Risk from Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19. html), Table 19.1 (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ ch19s19-3-1. html), in IPCC AR4 WG2 2007.
[127] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Section 5.2:
Key vulnerabilities, impacts and risks – long-term perspectives (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ mains5-2. html), in IPCC AR4 SYR 2007.
[128] Yohe, et al., Chapter 20: Perspectives on Climate Change and Sustainability (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/
ch20. html), Figure 20.3 (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ ch20s20-6-1. html), in IPCC AR4 WG2 2007.
[129] Stern, N. (2006). "6.2 What existing models calculate and include" (http:/ / www. hm-treasury. gov. uk/ d/
Chapter_6_Economic_modelling_of_climate-change_impacts. pdf) (PDF). 6 Economic modelling of climate-change impacts. Stern Review Report on the Economics of Climate Change (pre-publication edition). HM Treasury website. pp. 147–148. . Retrieved 28 April 2011. [130] Lobell, David; Burke, Tebaldi, Mastrandrea, Falcon, Naylor (2008). "Prioritizing climate change adaptation needs for food security in
2030" (http:/ / www. sciencemag. org/ content/ 319/ 5863/ 607). Science. . Retrieved 13 April 2012.
[131] Battisti, David; Naylor (2009). "Historical warnings of future food insecurity with unprecedented seasonal heat" (http:/ / www. sciencemag.
org/ content/ 323/ 5911/ 240. short). Science. . Retrieved 13 April 2012.
[132] Schneider et al., Chapter 19: Assessing Key Vulnerabilities and the Risk from Climate Change (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg2/ en/ ch19. html), Section 19.3.2.1: Agriculture (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/
ch19s19-3-2-1. html), in IPCC AR4 WG2 2007.
[133] IPCC AR4 SYR 2007. "3.3.3 Especially affected systems, sectors and regions" (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/
mains3-3-3. html). Synthesis report. .
[134] Mimura, N., et al. (2007). "Executive summary" (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg2/ en/ ch16s16-es. html). In Parry, M.L., et al. (eds.). Chapter 16: Small Islands. Climate change 2007: impacts, adaptation and vulnerability: contribution of Working Group II to the fourth assessment report of the Intergovernmental Panel on Climate Change (IPCC). Cambridge University Press (CUP): Cambridge, UK: Print version: CUP. This version: IPCC website. ISBN 0521880106. . Retrieved 2011-09-15. Global warming 65
[135] "Climate change and the risk of statelessness" (http:/ / www. unhcr. org/ 4df9cb0c9. pdf) (PDF). May 2011. . Retrieved 13 April 2012.
[136] IPCC, Glossary J-P (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ annex1sglossary-j-p. html): "Mitigation", in IPCC AR4 WG3 2007.
[137] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Section 4:
Adaptation and mitigation options (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spms4. html), in IPCC AR4 SYR 2007.
[138] IPCC (2007) IPCC AR4 WG1 2007 ed. Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg1/ en/ spm. html) ISBN 978-0-521-88009-1
[139] Rom, Joe (12 May 2011). "National Academy calls on nation to 'substantially reduce greenhouse gas emissions' starting ASAP" (http:/ /
thinkprogress. org/ romm/ 2011/ 05/ 12/ 208086/ national-academy-americaâs-climate-choices/ ). ThinkProgress. . Retrieved 7 February 2012.
[140] IEA (30 May 2011). "Prospect of limiting the global increase in temperature to 2ºC is getting bleaker" (http:/ / www. iea. org/ index_info. asp?id=1959). International Energy Agency. . Retrieved 7 February 2012.
[141] Robinson, Simon (22 January 2010). "How to reduce Carbon emmissions: Capture and Store It?" (http:/ / www. time. com/ time/ specials/
packages/ article/ 0,28804,1954176_1954175,00. html). Time. . Retrieved 9 August 2010.
[142] Smit et al., Chapter 18: Adaptation to Climate Change in the Context of Sustainable Development and Equity (http:/ / www. grida. no/
climate/ ipcc_tar/ wg2/ 641. htm), Section 18.2.3: Adaptation Types and Forms (http:/ / www. grida. no/ climate/ ipcc_tar/ wg2/ 644. htm#1823), in IPCC TAR WG2 2001.
[143] Banuri, et al., Chapter 3: Equity and Social Considerations, Section 3.1.2: Concepts of equity, p. 85 et seq. (http:/ / www. ipcc. ch/
ipccreports/ sar/ wg_III/ ipcc_sar_wg_III_full_report. pdf) in IPCC SAR WG3 1996.
[144] Banuri, et al., Chapter 3: Equity and Social Considerations, Section ??, p. 83 (http:/ / www. ipcc. ch/ ipccreports/ sar/ wg_III/
ipcc_sar_wg_III_full_report. pdf), in IPCC SAR WG3 1996. [145]
This citation will be automatically completed in the next few minutes. You can jump the queue or expand by hand (http:/ / en. wikipedia. org/
wiki/ Template:cite_doi/ _10. 1016. 2fj. gloenvcha. 2003. 10. 001?preload=Template:Cite_doi/ preload& editintro=Template:Cite_doi/
editintro& action=edit) [146] Oreskes, Naomi; Conway, Erik. Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming (first ed.). Bloomsbury Press. ISBN 978-1-59691-610-4.
[147] Julie Brigham-Grette et al. (September 2006). "Petroleum Geologists' Award to Novelist Crichton Is Inappropriate" (http:/ / www. agu. org/
fora/ eos/ pdfs/ 2006EO360008. pdf) (PDF). Eos 87 (36). . Retrieved 23 January 2007. "The AAPG stands alone among scientific societies in its denial of human-induced effects on global warming." [148] DiMento, Joseph F. C.; Doughman, Pamela M. (2007). Climate Change: What It Means for Us, Our Children, and Our Grandchildren. The MIT Press. p. 68. ISBN 978-0-262-54193-0. [149] Aaron M. McCright and Riley E. Dunlap, "Challenging Global Warming as a Social Problem: An Analysis of the Conservative
Movement's Counter-Claims," Social Problems, November 2000, Vol. 47 Issue 4, pp 499-522 in JSTOR (http:/ / www. jstor. org/ pss/ 3097132) [150] Quoted in IPCC SAR SYR 1996, "Synthesis of Scientific-Technical Information Relevant to Interpreting Article 2 of the UN Framework
Convention on Climate Change", paragraph 4.1, p. 8 ( pdf p. 18 (http:/ / www. ipcc. ch/ pdf/ climate-changes-1995/ ipcc-2nd-assessment/
2nd-assessment-en. pdf).) [151] Granger Morgan, M. (Lead Author), H. Dowlatabadi, M. Henrion, D. Keith, R. Lempert, S. McBride, M. Small and T. Wilbanks
(Contributing Authors) (2009). "BOX NT.1 Summary of Climate Change Basics" (http:/ / www. globalchange. gov/ publications/ reports/
scientific-assessments/ saps/ 311). Non-Technical Summary. Synthesis and Assessment Product 5.2: Best practice approaches for characterizing, communicating, and incorporating scientific uncertainty in decisionmaking. A Report by the U.S. Climate Change Science Program and the Subcommittee on Global Change Research. Washington D.C., USA.: National Oceanic and Atmospheric Administration. p. 11. . Retrieved 1 June 2011.
[152] UNFCCC (n.d.). "Essential Background" (http:/ / unfccc. int/ essential_background/ items/ 2877. php). UNFCCC website. . Retrieved 18 May 2010.
[153] UNFCCC (n.d.). "Full text of the Convention, Article 2" (http:/ / unfccc. int/ essential_background/ convention/ background/ items/ 1353. php). UNFCCC website. . Retrieved 18 May 2010.
[154] Rogner et al., Chapter 1: Introduction (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ ch1. html), Executive summary (http:/ /
www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ ch1s1-es. html), in IPCC AR4 WG3 2007. [155]
This citation will be automatically completed in the next few minutes. You can jump the queue or expand by hand (http:/ / en. wikipedia. org/
wiki/ Template:cite_doi/ _10. 1073. 2fpnas. 0700609104. 0a?preload=Template:Cite_doi/ preload& editintro=Template:Cite_doi/ editintro& action=edit)
[156] Dessai, S. (2001). "The climate regime from The Hague to Marrakech: Saving or sinking the Kyoto Protocol?" (http:/ / www. tyndall. ac.
uk/ sites/ default/ files/ wp12. pdf) (PDF). Tyndall Centre Working Paper 12. Tyndall Centre website. . Retrieved 5 May 2010.
[157] Grubb, M. (July–September 2003). "The Economics of the Kyoto Protocol" (http:/ / www. econ. cam. ac. uk/ rstaff/ grubb/ publications/
J36. pdf) (PDF). World Economics 4 (3): 144–145. . Retrieved 25 March 2010.
[158] UNFCCC (n.d.). "Kyoto Protocol" (http:/ / unfccc. int/ kyoto_protocol/ items/ 2830. php). UNFCCC website. . Retrieved 21 May 2011. Global warming 66
[159] Müller, Benito (February 2010) (PDF). Copenhagen 2009: Failure or final wake-up call for our leaders? EV 49 (http:/ / www.
oxfordenergy. org/ wpcms/ wp-content/ uploads/ 2011/ 03/
EV49-Copenhagen2009Failureorfinalwake-upcallforourleaders-BenitoMuller-2010. pdf). Oxford Institute for Energy Studies. p. i. ISBN 978190755046. . Retrieved 18 May 2010.
[160] United Nations Environment Programme (November 2010). "Technical summary" (http:/ / www. unep. org/ publications/ ebooks/
emissionsgapreport/ pdfs/ The_EMISSIONS_GAP_REPORT. pdf) (PDF). The Emissions Gap Report: Are the Copenhagen Accord pledges sufficient to limit global warming to 2 °C or 1.5 °C? A preliminary assessment (advance copy). UNEP website. . Retrieved 11 May 2011. This
publication is also available in e-book format (http:/ / www. unep. org/ publications/ ebooks/ emissionsgapreport/ ) [161] UNFCCC (30 March 2010). "Decision 2/CP. 15 Copenhagen Accord. In: Report of the Conference of the Parties on its fifteenth session, held in Copenhagen from 7 to 19 December 2009. Addendum. Part Two: Action taken by the Conference of the Parties at its fifteenth session"
(http:/ / unfccc. int/ documentation/ documents/ advanced_search/ items/ 3594. php?rec=j& priref=600005735#beg) (PDF). United Nations Office at Geneva, Switzerland. p. 5. . Retrieved 17 May 2010.
[162] "Outcome of the work of the Ad Hoc Working Group on long-term Cooperative Action under the Convention" (http:/ / unfccc. int/ files/
meetings/ cop_16/ application/ pdf/ cop16_lca. pdf). PRESIDENCIA DE LA REPÚBLICA, MÉXICO. 11 December 2010. p. 2. . Retrieved 12 January 2011.
[163] "69% Say It’s Likely Scientists Have Falsified Global Warming Research – Rasmussen Reports™" (http:/ / www. rasmussenreports. com/
public_content/ politics/ current_events/ environment_energy/ 69_say_it_s_likely_scientists_have_falsified_global_warming_research). Rasmussenreports.com. 3 August 2011. . Retrieved 27 December 2011.
[164] Pelham, Brett (22 April 2009). "Awareness, Opinions About Global Warming Vary Worldwide" (http:/ / www. gallup. com/ poll/ 117772/
Awareness-Opinions-Global-Warming-Vary-Worldwide. aspx). Gallup. . Retrieved 14 July 2009.
[165] "Summary of Findings" (http:/ / people-press. org/ reports/ display. php3?ReportID=280). Little Consensus on Global Warming. Partisanship Drives Opinion. Pew Research Center. 12 July 2006. . Retrieved 14 April 2007.
[166] Crampton, Thomas (4 January 2007). "More in Europe worry about climate than in U.S., poll shows" (http:/ / www. nytimes. com/ 2007/
01/ 04/ health/ 04iht-poll. 4102536. html?_r=1). The New York Times. . Retrieved 9 June 2010.
[167] "Public attitudes towards climate change and the impact on transport (January 2011 report)" (http:/ / www. dft. gov. uk/ pgr/ statistics/
datatablespublications/ trsnstatsatt/ climatejan2011report). Department for Transport. 2011. p. 8. . Retrieved 3 February 2011.
[168] Damian Carrington (31 January 2011). "Public belief in climate change weathers storm, poll shows | Environment | guardian.co.uk" (http:/ /
www. guardian. co. uk/ environment/ 2011/ jan/ 31/ public-belief-climate-change). The Guardian. UK. . Retrieved 4 February 2011.
[169] "Fewer Americans See Solid Evidence of Global Warming" (http:/ / people-press. org/ report/ 556/ global-warming). Pew Research Center for the People & the Press. 22 October 2009. . Retrieved 26 February 2011. [170] Robin Lloyd (23 February 2011). "Why Are Americans So Ill-Informed about Climate Change?: Scientists and journalists debate why
Americans still resist the consensus among research organizations that humans are warming the globe" (http:/ / www. scientificamerican. com/
article. cfm?id=why-are-americans-so-ill). Scientific American. Nature America, Inc.. . Retrieved 26 February 2011.
[171] "59% Say Scientists Disagree 'Significantly' Over Global Warming – Rasmussen Reports™" (http:/ / www. rasmussenreports. com/
public_content/ politics/ current_events/ environment_energy/ 59_say_scientists_disagree_significantly_over_global_warming). Rasmussenreports.com. 20 April 2010. . Retrieved 27 December 2011.
[172] Pugliese, Anita (20 April 2011). "Fewer Americans, Europeans View Global Warming as a Threat" (http:/ / www. gallup. com/ poll/
147203/ Fewer-Americans-Europeans-View-Global-Warming-Threat. aspx). Gallup. . Retrieved 22 April 2011.
[173] Ray, Julie; Anita Pugliese (22 April 2011). "Worldwide, Blame for Climate Change Falls on Humans" (http:/ / www. gallup. com/ poll/
147242/ Worldwide-Blame-Climate-Change-Falls-Humans. aspx). Gallup.Com. . Retrieved 3 May 2011. "People nearly everywhere, including majorities in developed Asia and Latin America, are more likely to attribute global warming to human activities rather than natural causes. The U.S. is the exception, with nearly half (47%) – and the largest percentage in the world – attributing global warming to natural causes."
[174] Leiserowitz, A.; E. Maibach, C. Roser-Renouf, & N. Smith (2011). Global Warming's Six Americas, May 2011 (http:/ / environment. yale.
edu/ climate/ news/ SixAmericasMay2011/ ). New Haven CT: Yale Project on Climate Change Communication: Yale University and George Mason University. .
[175] "It's All in a Name: 'Global Warming' Vs. 'Climate Change'" (http:/ / www. sciencedaily. com/ releases/ 2011/ 03/ 110308173242. htm). .
[176] IVN. " PPIC survey puts spotlight on environmental issues (http:/ / caivn. org/ article/ 2011/ 08/ 01/ ppic-survey-puts-spotlight-environmental-issues)." 1 August 2011
[177] "Angus Reid Public Opinion poll conducted 25 August through 2 September 2011" (http:/ / www. angus-reid. com/ wp-content/ uploads/
2011/ 09/ 2011. 09. 12_Climate. pdf) (PDF). . Retrieved 27 December 2011. [178] Royal Society (13 April 2005). "Letter from The Royal Society: A GUIDE TO FACTS AND FICTIONS ABOUT CLIMATE CHANGE: Misleading arguments: Many scientists do not think that climate change is a problem. Some scientists have signed petitions stating that
climate change is not a problem." (http:/ / www. publications. parliament. uk/ pa/ ld200506/ ldselect/ ldeconaf/ 12/ 12we24. htm). Economic Affairs – Written Evidence. The Economics of Climate Change, the Second Report of the 2005–2006 session, produced by the UK Parliament House of Lords Economics Affairs Select Committee. UK Parliament website. . Retrieved 9 July 2011. This document is also available in
PDF format (http:/ / royalsociety. org/ Facts-and-fictions-about-climate-change/ ) [179] Academia Brasileira de Ciéncias (Brazil), Royal Society of Canada, Chinese Academy of Sciences, Académie des Sciences (France), Deutsche Akademie der Naturforscher Leopoldina (Germany), Indian National Science Academy, Accademia Nazionale dei Lincei (Italy), Global warming 67
Science Council of Japan, Academia Mexicana de Ciencias, Russian Academy of Sciences, Academy of Science of South Africa, Royal Society (United Kingdom), National Academy of Sciences (United States of America) (May 2009). "G8+5 Academies’ joint statement:
Climate change and the transformation of energy technologies for a low carbon future" (http:/ / www. nationalacademies. org/ includes/ G8+
5energy-climate09. pdf). US National Academies website. . Retrieved 5 May 2010.
[180] Weart, S. (July 2009). "The Public and Climate Change (cont. – since 1980). Section: After 1988" (http:/ / www. aip. org/ history/ climate/
public2. htm). American Institute of Physics website. . Retrieved 5 May 2010.
[181] SEPP (n.d.). "Frequently Asked Questions About Climate Change" (http:/ / web. archive. org/ web/ 20080511011611/ http:/ / www. sepp.
org/ FAQ/ faq. html). Science & Environmental Policy Project (SEPP) website. Archived from the original (http:/ / www. sepp. org/ FAQ/ faq. html) on 11 May 2008. . Retrieved 5 May 2010.
[182] Begley, Sharon (13 August 2007). "The Truth About Denial" (http:/ / www. newsweek. com/ id/ 32482). Newsweek. . Retrieved 13 August 2007.
[183] Adams, David (20 September 2006). "Royal Society tells Exxon: stop funding climate change denial" (http:/ / www. guardian. co. uk/
environment/ 2006/ sep/ 20/ oilandpetrol. business). The Guardian. London. . Retrieved 9 August 2007.
[184] "Exxon cuts ties to global warming skeptics" (http:/ / www. msnbc. msn. com/ id/ 16593606). MSNBC. 12 January 2007. . Retrieved 2 May 2007.
[185] Sandell, Clayton (3 January 2007). "Report: Big Money Confusing Public on Global Warming" (http:/ / abcnews. go. com/ Technology/
Business/ story?id=2767979& page=1). ABC. . Retrieved 27 April 2007.
[186] "About DBCCA" (http:/ / www. dbcca. com/ dbcca/ EN/ about-us. jsp). Deutsche Bank: DB Climate Change Advisors. Frankfurt am Main: Deutsche Bank AG. 12 May 2010. . Retrieved 5 November 2010. "DB Climate Change Advisors is the brand name for the institutional climate change investment division of Deutsche Asset Management, the asset management arm of Deutsche Bank AG."
[187] "Investment Research" (http:/ / www. dbcca. com/ dbcca/ EN/ investment_research. jsp). Deutsche Bank: DB Climate Change Advisors. Frankfurt am Main: Deutsche Bank AG. 2 November 2010. . Retrieved 5 November 2010. [188] Carr, Mary-Elena; Kate Brash, Robert F. Anderson (September 2010). "Climate Change: Addressing the Major Skeptic Arguments" (http:/
/ www. dbcca. com/ dbcca/ EN/ _media/ DBCCAColumbiaSkepticPaper090710. pdf) (PDF). DB Climate Change Advisors: Deutsche Bank Group. p. 55. . Retrieved 5 November 2010. "The planet is warming and it is likely to continue to warm as a consequence of increased greenhouse gas emissions."
[189] "New Report Provides Authoritative Assessment of National, Regional Impacts of Global Climate Change" (http:/ / www. globalchange.
gov/ images/ cir/ pdf/ Climate-Impacts-PR_june-6-2009. pdf) (PDF) (Press release). U.S. Global Change Research Program. 6 June 2009. . Retrieved 27 June 2009.
[190] Reuters (18 May 2007). "Greenpeace: Exxon still funding climate skeptics" (http:/ / www. usatoday. com/ weather/ climate/
globalwarming/ 2007-05-18-greenpeace-exxon_N. htm). USA Today. . Retrieved 21 January 2010. [191] "Global Warming Resolutions at U.S. Oil Companies Bring Policy Commitments from Leaders, and Record High Votes at Laggards"
(http:/ / www. csrwire. com/ press/ press_release/ 23395-Global-Warming-Resolutions-at-U-S-Oil-Companies-Bring-Policy-Commitments-from-Leaders-and-Record-High-Votes-at-Laggards) (Press release). Ceres. 13 May 2004. . Retrieved 4 March 2010.
[192] Stefan (28 July 2010). "Happy 35th birthday, global warming!" (http:/ / www. realclimate. org/ index. php/ archives/ 2010/ 07/
happy-35th-birthday-global-warming/ ). RealClimate. . Retrieved 10 August 2010. "[Broecker's article is] the first of over 10,000 papers for this search term according to the ISI database of journal articles"
[193] Johnson, Brad (3 August 2010). "Wally's World" (http:/ / www. foreignpolicy. com/ articles/ 2010/ 08/ 03/ wallys_world). Foreign Policy. . Retrieved 10 August 2010. [194] Wallace Broecker, "Climatic Change: Are We on the Brink of a Pronounced Global Warming?" Science, vol. 189 (8 August 1975), 460–463.
[195] Erik Conway. "What's in a Name? Global Warming vs. Climate Change" (http:/ / www. nasa. gov/ topics/ earth/ features/
climate_by_any_other_name. html), NASA, 5 December 2008 [196] National Academy of Science, Carbon Dioxide and Climate, Washington, D.C., 1979, p. vii. [197] U.S. Senate, Committee on Energy and Natural Resources, "Greenhouse Effect and Global Climate Change, part 2" 100th Cong., 1st sess., 23 June 1988, p. 44.
[198] Kirby, Alex (17 May 2001). "Science academies back Kyoto" (http:/ / news. bbc. co. uk/ 1/ hi/ sci/ tech/ 1335872. stm). BBC News. . Retrieved 27 July 2011.
[199] http:/ / www. nagt. org/ index. html
[200] IPCC, Synthesis Report Summary for Policymakers (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ spm. html), Introduction
(http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ mainssyr-introduction. html), in IPCC AR4 SYR 2007. Global warming 68
References • IPCC AR4 SYR (2007), Core Writing Team; Pachauri, R.K; and Reisinger, A., ed., Climate Change 2007:
Synthesis Report (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ syr/ en/ contents. html), Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, IPCC, ISBN 92-9169-122-4 • IPCC AR4 WG1 (2007), Solomon, S.; Qin, D.; Manning, M.; Chen, Z.; Marquis, M.; Averyt, K.B.; Tignor, M.;
and Miller, H.L., ed., Climate Change 2007: The Physical Science Basis (http:/ / www. ipcc. ch/
publications_and_data/ ar4/ wg1/ en/ contents. html), Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 978-0-521-88009-1 (pb: 978-0-521-70596-7) • IPCC AR4 WG2 (2007), Parry, M.L.; Canziani, O.F.; Palutikof, J.P.; van der Linden, P.J.; and Hanson, C.E., ed.,
Climate Change 2007: Impacts, Adaptation and Vulnerability (http:/ / www. ipcc. ch/ publications_and_data/ ar4/
wg2/ en/ contents. html), Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 978-0-521-88010-7 (pb: 978-0-521-70597-4) • IPCC AR4 WG3 (2007), Metz, B.; Davidson, O.R.; Bosch, P.R.; Dave, R.; and Meyer, L.A., ed., Climate Change
2007: Mitigation of Climate Change (http:/ / www. ipcc. ch/ publications_and_data/ ar4/ wg3/ en/ contents. html), Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 978-0-521-88011-4 (pb: 978-0-521-70598-1) • IPCC SAR SYR (1996), Climate Change 1995: A report of the Intergovernmental Panel on Climate Change,
Second Assessment Report of the Intergovernmental Panel on Climate Change, IPCC pdf (http:/ / www. ipcc. ch/
pdf/ climate-changes-1995/ ipcc-2nd-assessment/ 2nd-assessment-en. pdf). The "Full Report", consisting of "The IPCC Second Assessment Synthesis of Scientific-Technical Information Relevant to Interpreting Article 2 of the UN Framework Convention on Climate Change" and the Summaries for Policymakers of the three Working Groups. • IPCC SAR WG3 (1996), Bruce, J.P.; Lee, H.; and Haites, E.F., ed., Climate Change 1995: Economic and Social Dimensions of Climate Change, Contribution of Working Group III to the Second Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 0-521-56051-9 (pb:
0-521-56854-4) pdf (http:/ / www. ipcc. ch/ ipccreports/ sar/ wg_III/ ipcc_sar_wg_III_full_report. pdf). • IPCC TAR WG1 (2001), Houghton, J.T.; Ding, Y.; Griggs, D.J.; Noguer, M.; van der Linden, P.J.; Dai, X.;
Maskell, K.; and Johnson, C.A., ed., Climate Change 2001: The Scientific Basis (http:/ / www. grida. no/
publications/ other/ ipcc_tar/ ?src=/ climate/ ipcc_tar/ wg1/ index. htm), Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 0-521-80767-0 (pb: 0-521-01495-6) • IPCC TAR WG2 (2001), McCarthy, J. J.; Canziani, O. F.; Leary, N. A.; Dokken, D. J.; and White, K. S., ed.,
Climate Change 2001: Impacts, Adaptation and Vulnerability (http:/ / www. grida. no/ publications/ other/
ipcc_tar/ ?src=/ climate/ ipcc_tar/ wg2/ index. htm), Contribution of Working Group II to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 0-521-80768-9 (pb: 0-521-01500-6) • IPCC TAR WG3 (2001), Metz, B.; Davidson, O.; Swart, R.; and Pan, J., ed., Climate Change 2001: Mitigation
(http:/ / www. grida. no/ publications/ other/ ipcc_tar/ ?src=/ climate/ ipcc_tar/ wg3/ index. htm), Contribution of Working Group III to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 0-521-80769-7 (pb: 0-521-01502-2) • IPCC TAR SYR (2001), Watson, R. T.; and the Core Writing Team, ed., Climate Change 2001: Synthesis Report
(http:/ / www. ipcc. ch/ ipccreports/ tar/ vol4/ english/ index. htm), Contribution of Working Groups I, II, and III to the Third Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, ISBN 0-521-80770-0 (pb: 0-521-01507-3) Global warming 69
• National Research Council (2010), America's Climate Choices: Panel on Advancing the Science of Climate
Change; (http:/ / www. nap. edu/ catalog. php?record_id=12782), Washington, D.C.: The National Academies Press, ISBN 0-309-14588-0
Further reading
• Association of British Insurers (2005–06) (PDF). Financial Risks of Climate Change (http:/ / www. climatewise.
org. uk/ storage/ 610/ financial_risks_of_climate_change. pdf). • Ammann, Caspar; et al. (2007). "Solar influence on climate during the past millennium: Results from transient
simulations with the NCAR Climate Simulation Model" (http:/ / www. pnas. org/ cgi/ reprint/ 104/ 10/ 3713. pdf) (PDF). Proceedings of the National Academy of Sciences of the United States of America 104 (10): 3713–3718. Bibcode 2007PNAS..104.3713A. doi:10.1073/pnas.0605064103. PMC 1810336. PMID 17360418. "Simulations with only natural forcing components included yield an early 20th century peak warming of 0.2 °C (≈1950 AD), which is reduced to about half by the end of the century because of increased volcanism" • Barnett, TP; Adam, JC; Lettenmaier, DP; Adam, J. C.; Lettenmaier, D. P. (17 November 2005). "Potential
impacts of a warming climate on water availability in snow-dominated regions" (http:/ / www. nature. com/
nature/ journal/ v438/ n7066/ abs/ nature04141. html) (abstract). Nature 438 (7066): 303–309. Bibcode 2005Natur.438..303B. doi:10.1038/nature04141. PMID 16292301. • Behrenfeld, MJ; O'malley, RT; Siegel, DA; Mcclain, CR; Sarmiento, JL; Feldman, GC; Milligan, AJ; Falkowski,
PG et al; et al. (7 December 2006). "Climate-driven trends in contemporary ocean productivity" (http:/ / www.
icess. ucsb. edu/ ~davey/ MyPapers/ Behrenfeld_etal_2006_Nature. pdf) (PDF). Nature 444 (7120): 752–755. Bibcode 2006Natur.444..752B. doi:10.1038/nature05317. PMID 17151666. • Choi, Onelack; Fisher, Ann (May 2005). "The Impacts of Socioeconomic Development and Climate Change on
Severe Weather Catastrophe Losses: Mid-Atlantic Region (MAR) and the U.S" (http:/ / www. springerlink. com/
content/ m6308777613702q0/ ). Climate Change 58 (1–2): 149–170. doi:10.1023/A:1023459216609. • Dyurgerov, Mark B.; Meier, Mark F. (2005) (PDF). Glaciers and the Changing Earth System: a 2004 Snapshot
(http:/ / instaar. colorado. edu/ other/ download/ OP58_dyurgerov_meier. pdf). Institute of Arctic and Alpine Research Occasional Paper #58. ISSN 0069-6145.
• Emanuel, K (4 August 2005). "Increasing destructiveness of tropical cyclones over the past 30 years" (ftp:/ /
texmex. mit. edu/ pub/ emanuel/ PAPERS/ NATURE03906. pdf) (PDF). Nature 436 (7051): 686–688. Bibcode 2005Natur.436..686E. doi:10.1038/nature03906. PMID 16056221.
• Hansen, James; et al. (3 June 2005). "Earth's Energy Imbalance: Confirmation and Implications" (http:/ / pangea.
stanford. edu/ research/ Oceans/ GES205/ Hansen_Science_Earth's Energy Balance. pdf) (PDF). Science 308 (5727): 1431–1435. Bibcode 2005Sci...308.1431H. doi:10.1126/science.1110252. PMID 15860591. • Hinrichs, Kai-Uwe; Hmelo, Laura R.; Sylva, Sean P. (21 February 2003). "Molecular Fossil Record of Elevated Methane Levels in Late Pleistocene Coastal Waters". Science 299 (5610): 1214–1217. Bibcode 2003Sci...299.1214H. doi:10.1126/science.1079601. PMID 12595688.
• Hirsch, Tim (11 January 2006). "Plants revealed as methane source" (http:/ / news. bbc. co. uk/ 2/ hi/ science/
nature/ 4604332. stm). BBC. • Hoyt, Douglas V.; Schatten, Kenneth H. (1993–11). "A discussion of plausible solar irradiance variations, 1700–1992". Journal of Geophysical Research 98 (A11): 18,895–18,906. Bibcode 1993JGR....9818895H. doi:10.1029/93JA01944. • Karnaukhov, A. V. (2001). "Role of the Biosphere in the Formation of the Earth's Climate: The Greenhouse
Catastrophe" (http:/ / avturchin. narod. ru/ Green. pdf) (PDF). Biophysics 46 (6). • Kenneth, James P.; et al. (14 February 2003). Methane Hydrates in Quaternary Climate Change: The Clathrate
Gun Hypothesis (https:/ / www. agu. org/ cgi-bin/ agubooks?book=ASSP0542960). American Geophysical Union. Global warming 70
• Keppler, Frank; et al. (18 January 2006). "Global Warming – The Blame Is not with the Plants" (http:/ / www.
mpg. de/ english/ illustrationsDocumentation/ documentation/ pressReleases/ 2006/ pressRelease200601131/
index. html). Max Planck Society. • Lean, Judith L.; Wang, Y.M.; Sheeley, N.R. (2002–12). "The effect of increasing solar activity on the Sun's total and open magnetic flux during multiple cycles: Implications for solar forcing of climate" (abstract). Geophysical Research Letters 29 (24): 2224. Bibcode 2002GeoRL..29x..77L. doi:10.1029/2002GL015880. • Lerner, K. Lee; Lerner, K. Lee; Wilmoth, Brenda (26 July 2006). Environmental issues: essential primary sources. Thomson Gale. ISBN 1-4144-0625-8.
• McKibben, Bill (2011). The Global Warming Reader (http:/ / www. orbooks. com/ our-books/ gwr/ ). OR Books. ISBN 978-1-935928-36-2. • Muscheler, Raimund, R; Joos, F; Müller, SA; Snowball, I; et al. (28 July 2005). "Climate: How unusual is today's
solar activity?" (http:/ / www. cgd. ucar. edu/ ccr/ raimund/ publications/ Muscheler_et_al_Nature2005. pdf) (PDF). Nature 436 (7012): 1084–1087. Bibcode 2005Natur.436E...3M. doi:10.1038/nature04045. PMID 16049429.
• Oerlemans, J. (29 April 2005). "Extracting a Climate Signal from 169 Glacier Records" (http:/ / www. cosis. net/
abstracts/ EGU05/ 04572/ EGU05-J-04572. pdf) (PDF). Science 308 (5722): 675–677. Bibcode 2005Sci...308..675O. doi:10.1126/science.1107046. PMID 15746388. • Purse, BV; Mellor, PS; Rogers, DJ; Samuel, AR; Mertens, PP; Baylis, M; et al. (February 2005). "Climate change
and the recent emergence of bluetongue in Europe" (http:/ / www. nature. com/ nrmicro/ journal/ v3/ n2/ abs/
nrmicro1090_fs. html) (abstract). Nature Reviews Microbiology 3 (2): 171–181. doi:10.1038/nrmicro1090. PMID 15685226.
• Revkin, Andrew C (5 November 2005). "Rise in Gases Unmatched by a History in Ancient Ice" (http:/ / www.
nytimes. com/ 2005/ 11/ 25/ science/ earth/ 25core. html?ei=5090& en=d5078e33050b2b0c& ex=1290574800&
adxnnl=1& partner=rssuserland& emc=rss). The New York Times.
• Royal Society (2005). "Joint science academies' statement: Global response to climate change" (http:/ /
royalsociety. org/ Joint-science-academies-statement-Global-response-to-climate-change/ ). Retrieved 19 April 2009.
• Ruddiman, William F. (15 December 2005). Earth's Climate Past and Future (http:/ / www. whfreeman. com/
ruddiman/ ). New York: Princeton University Press. ISBN 0-7167-3741-8. • Ruddiman, William F. (1 August 2005). Plows, Plagues, and Petroleum: How Humans Took Control of Climate. New Jersey: Princeton University Press. ISBN 0-691-12164-8. • Solanki, SK; Usoskin, IG; Kromer, B; Schüssler, M; Beer, J; et al. (23 October 2004). "Unusual activity of the
Sun during recent decades compared to the previous 11,000 years" (http:/ / cc. oulu. fi/ ~usoskin/ personal/
nature02995. pdf) (PDF). Nature 431 (7012): 1084–1087. Bibcode 2004Natur.431.1084S. doi:10.1038/nature02995. PMID 15510145.
• Solanki, Sami K.; et al. (28 July 2005). "Climate: How unusual is today's solar activity? (Reply)" (http:/ / cc.
oulu. fi/ ~usoskin/ personal/ sola_nature05. pdf) (PDF). Nature 436 (7050): E4–E5. Bibcode 2005Natur.436E...4S. doi:10.1038/nature04046. • Sowers, Todd (10 February 2006). "Late Quaternary Atmospheric CH Isotope Record Suggests Marine 4 Clathrates Are Stable". Science 311 (5762): 838–840. Bibcode 2006Sci...311..838S. doi:10.1126/science.1121235. PMID 16469923. • Svensmark, Henrik; et al. (8 February 2007). "Experimental evidence for the role of ions in particle nucleation under atmospheric conditions". Proceedings of the Royal Society A (FirstCite Early Online Publishing) 463 (2078): 385–396. Bibcode 2007RSPSA.463..385S. doi:10.1098/rspa.2006.1773.(online version requires registration) • Walter, KM; Zimov, SA; Chanton, JP; Verbyla, D; Chapin Fs, 3rd; et al. (7 September 2006). "Methane bubbling from Siberian thaw lakes as a positive feedback to climate warming". Nature 443 (7107): 71–75. Global warming 71
Bibcode 2006Natur.443...71W. doi:10.1038/nature05040. PMID 16957728. • Wang, Y.-M.; Lean, J.L.; Sheeley, N.R. (20 May 2005). "Modeling the sun's magnetic field and irradiance since
1713" (http:/ / climatesci. colorado. edu/ publications/ pdf/ Wang_2005. pdf) (PDF). Astrophysical Journal 625 (1): 522–538. Bibcode 2005ApJ...625..522W. doi:10.1086/429689.
External links Research
• NASA Goddard Institute for Space Studies (http:/ / www. giss. nasa. gov/ ) – Global change research
• NOAA State of the Climate Report (http:/ / www. ncdc. noaa. gov/ sotc/ global/ 2011/ 2) – U.S. and global monthly state of the climate reports
• Climate Change at the National Academies (http:/ / dels. nas. edu/ Climate/ Climate-Change/ Reports-Academies-Findings) – repository for reports
• Nature Reports Climate Change (http:/ / www. nature. com/ climate/ index. html) – free-access web resource
• Met Office: Climate change (http:/ / www. metoffice. gov. uk/ climatechange/ ) – UK National Weather Service
• Global Science and Technology Sources on the Internet (http:/ / www. istl. org/ 01-fall/ internet. html) – commented list
• Educational Global Climate Modelling (http:/ / edgcm. columbia. edu/ ) (EdGCM) – research-quality climate change simulator
• DISCOVER (http:/ / discover. itsc. uah. edu/ ) – satellite-based ocean and climate data since 1979 from NASA
• Global Warming Art (http:/ / www. globalwarmingart. com/ ) – collection of figures and images Educational
• What Is Global Warming? (http:/ / green. nationalgeographic. com/ environment/ global-warming/ gw-overview. html) – by National Geographic
• Global Climate Change Indicators (http:/ / www. ncdc. noaa. gov/ indicators/ ) – from NOAA
• NOAA Climate Services (http:/ / www. climate. gov/ #understandingClimate) – from NOAA
• Global Warming Frequently Asked Questions (http:/ / www. ncdc. noaa. gov/ oa/ climate/ globalwarming. html) – from NOAA
• Understanding Climate Change – Frequently Asked Questions (http:/ / www. ucar. edu/ news/ features/
climatechange/ faqs. jsp) – from UCAR
• Global Warming: Center for Global Studies at the University of Illinois (http:/ / cgs. illinois. edu/ content/ global-warming-resources)
• Global Climate Change: NASA's Eyes on the Earth (http:/ / climate. jpl. nasa. gov/ ) – from NASA's JPL and Caltech
• OurWorld 2.0 (http:/ / ourworld. unu. edu/ en/ series/ climate/ ) – from the United Nations University
• Center for Climate and Energy Solutions (http:/ / www. c2es. org/ ) – business and politics
• Best Effort Global Warming Trajectories – Wolfram Demonstrations Project (http:/ / demonstrations. wolfram.
com/ BestEffortGlobalWarmingTrajectories/ ) – by Harvey Lam
• Koshland Science Museum – Global Warming Facts and Our Future (http:/ / www. koshland-science-museum.
org/ exhibitgcc/ ) – graphical introduction from National Academy of Sciences
• Climate Change: Coral Reefs on the Edge (http:/ / site. videoproject. com/ coralreefs/ ) – A video presentation by Prof. Ove Hoegh-Guldberg, University of Auckland
• Climate Change Indicators in the United States (http:/ / www. epa. gov/ climatechange/ indicators. html) Report by United States Environmental Protection Agency, 80 pp.
• Global Warming (http:/ / chemistry. beloit. edu/ Warming/ index. html)
• Video on the effects of global warming on St. Lawrence Island in the Bering Sea (http:/ / www. pbs. org/ wgbh/
nova/ extremeice/ thin_01_q_300. html) Article Sources and Contributors 72 Article Sources and Contributors
Biome Source: http://en.wikipedia.org/w/index.php?oldid=489569587 Contributors: 0x6D667061, 12 Noon, 129.42.208.xxx, 149AFK, 172.156.6.xxx, 172.173.101.xxx, 18taniry, 1exec1, 28421u2232nfenfcenc, 2D, 66.153.24.xxx, A D Monroe III, A.Ou, A8UDI, Abd, Academic Challenger, Acalamari, Aerosolben, Agent Smith (The Matrix), Ahoerstemeier, Airbag190, Aitias, Alan Liefting, Alansohn, Ale jrb, Alexf, AlexiusHoratius, Allens, AnOnYmOuSxUnKnOwN, AnY FOUR!, Anclation, Andre Engels, AndrewN, Andy M. 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Image:Earth Western Hemisphere.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Earth_Western_Hemisphere.jpg License: unknown Contributors: EVula, Juiced lemon, Tom, WikipediaMaster, 2 anonymous edits Image:Vegetation-no-legend.PNG Source: http://en.wikipedia.org/w/index.php?title=File:Vegetation-no-legend.PNG License: Creative Commons Attribution-ShareAlike 3.0 Unported Contributors: Sten Porse Image:Ocean drainage.png Source: http://en.wikipedia.org/w/index.php?title=File:Ocean_drainage.png License: Public Domain Contributors: Original uploader was Citynoise at en.wikipedia Later version(s) were uploaded by Bolonium at en.wikipedia. Image:African Elephant distribution map.svg Source: http://en.wikipedia.org/w/index.php?title=File:African_Elephant_distribution_map.svg License: Creative Commons Attribution-ShareAlike 3.0 Unported Contributors: Bamse Image:RangeMap Lmarinus.jpg Source: http://en.wikipedia.org/w/index.php?title=File:RangeMap_Lmarinus.jpg License: Creative Commons Attribution-ShareAlike 3.0 Unported Contributors: AHA2, Misigon, Tony Wills File:The Earth seen from Apollo 17.jpg Source: http://en.wikipedia.org/w/index.php?title=File:The_Earth_seen_from_Apollo_17.jpg License: Public Domain Contributors: NASA. Photo taken by either Harrison Schmitt or Ron Evans (of the Apollo 17 crew). File:Hawk eating prey.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Hawk_eating_prey.jpg License: Creative Commons Attribution 2.0 Contributors: Steve Jurvetson File:European honey bee extracts nectar.jpg Source: http://en.wikipedia.org/w/index.php?title=File:European_honey_bee_extracts_nectar.jpg License: Public domain Contributors: John Severns = Severnjc File:Bufo boreas.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Bufo_boreas.jpg License: Creative Commons Attribution 3.0 Contributors: Thompsma File:Blue Linckia Starfish.JPG Source: http://en.wikipedia.org/w/index.php?title=File:Blue_Linckia_Starfish.JPG License: Creative Commons Attribution-Sharealike 2.5 Contributors: Richard Ling File:Seral stages 4.JPG Source: http://en.wikipedia.org/w/index.php?title=File:Seral_stages_4.JPG License: Public Domain Contributors: M gerzon File:Termite mound-Tanzania.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Termite_mound-Tanzania.jpg License: Public domain Contributors: Vierka Maráková, Slovakia (Krokodild at en.wikipedia) Image:Carabus auratus with prey.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Carabus_auratus_with_prey.jpg License: GNU Free Documentation License Contributors: Daniel 1992, Erfil, Grzegorz Wysocki, Havang(nl), Lamiot, Liné1, Mattes, Moros, Richard001, Sandstein, Soebe, 2 anonymous edits Image:Ecoecolfigure1.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Ecoecolfigure1.jpg License: Public Domain Contributors: Ncycling File:Chesapeake Waterbird Food Web.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Chesapeake_Waterbird_Food_Web.jpg License: Public Domain Contributors: Matthew C. Perry File:TrophicWeb.jpg Source: http://en.wikipedia.org/w/index.php?title=File:TrophicWeb.jpg License: Creative Commons Attribution 3.0 Contributors: Thompsma File:Chameleon spectra.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Chameleon_spectra.jpg License: Creative Commons Attribution 2.5 Contributors: Stuart-Fox D, Moussalli A, File:Common jassid nymphs and ants02.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Common_jassid_nymphs_and_ants02.jpg License: unknown Contributors: Fir0002, Ranveig, 1 anonymous edits File:Parasitismus.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Parasitismus.jpg License: GNU Free Documentation License Contributors: NeverDoING, Pudding4brains, Saperaud, Sarefo, Soebe, Tickle me, Wlodzimierz, 1 anonymous edits File:Leaf 1 web.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Leaf_1_web.jpg License: Public Domain Contributors: Ies, Ranveig, Red devil 666, Rocket000, WeFt, Überraschungsbilder File:Grassflowers.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Grassflowers.jpg License: Public Domain Contributors: Hardyplants File:Mosaic fire burn.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Mosaic_fire_burn.jpg License: Public Domain Contributors: Ies, MONGO, Ma-Lik, 1 anonymous edits File:Lodgepole pine cone after fire.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Lodgepole_pine_cone_after_fire.jpg License: Public Domain Contributors: MONGO, MPF, Sct72 File:Nicola Perscheid - Ernst Haeckel.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Nicola_Perscheid_-_Ernst_Haeckel.jpg License: Public Domain Contributors: Paulae File:Warming,Eugen-c1900.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Warming,Eugen-c1900.jpg License: anonymous-EU Contributors: Nillerdk File:Darwin EcoExperiment.JPG Source: http://en.wikipedia.org/w/index.php?title=File:Darwin_EcoExperiment.JPG License: Public Domain Contributors: G. Sinclair Image:Global Temperature Anomaly 1880-2010 (Fig.A).gif Source: http://en.wikipedia.org/w/index.php?title=File:Global_Temperature_Anomaly_1880-2010_(Fig.A).gif License: unknown Contributors: NASA Goddard Institute for Space Studies Image:GISS temperature 2000-09 lrg.png Source: http://en.wikipedia.org/w/index.php?title=File:GISS_temperature_2000-09_lrg.png License: Public Domain Contributors: NASA images by Robert Simmon, based on data from the Goddard Institute for Space Studies. Image:GISS temperature palette.png Source: http://en.wikipedia.org/w/index.php?title=File:GISS_temperature_palette.png License: Public Domain Contributors: NASA images by Robert Simmon, based on data from the Goddard Institute for Space Studies. Image:Global Warming Observed CO2 Emissions from fossil fuel burning vs IPCC scenarios.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Global_Warming_Observed_CO2_Emissions_from_fossil_fuel_burning_vs_IPCC_scenarios.jpg License: Creative Commons Attribution-Sharealike 3.0 Contributors: Alan Liefting, Infrogmation, NewsAndEventsGuy File:2000 Year Temperature Comparison.png Source: http://en.wikipedia.org/w/index.php?title=File:2000_Year_Temperature_Comparison.png License: unknown Contributors: Chipmonkey, Cwbm (commons), Dipaolom, Dragons flight, Fences and windows, Glenn, Herbythyme, Hgrobe, Infrogmation, Kallerna, Liftarn, Mach, Myself488, Nagy, Pflatau, Qgaliana, Rosarinagazo, Saperaud, Stephan Schulz, Túrelio, Zedshort, 31 anonymous edits File:Enso-global-temp-anomalies.png Source: http://en.wikipedia.org/w/index.php?title=File:Enso-global-temp-anomalies.png License: Public Domain Contributors: Dave souza Image:Greenhouse Effect.svg Source: http://en.wikipedia.org/w/index.php?title=File:Greenhouse_Effect.svg License: GNU Free Documentation License Contributors: User:Rugby471 Image:Mauna Loa Carbon Dioxide-en.svg Source: http://en.wikipedia.org/w/index.php?title=File:Mauna_Loa_Carbon_Dioxide-en.svg License: Creative Commons Attribution-Sharealike 3.0,2.5,2.0,1.0 Contributors: Sémhur Image:GHG per capita 2005.png Source: http://en.wikipedia.org/w/index.php?title=File:GHG_per_capita_2005.png License: Creative Commons Attribution-Sharealike 3.0 Contributors: Sailsbystars Image:GHG by country 2005.png Source: http://en.wikipedia.org/w/index.php?title=File:GHG_by_country_2005.png License: Creative Commons Attribution-Sharealike 3.0 Contributors: Sailsbystars File:ShipTracks MODIS 2005may11.jpg Source: http://en.wikipedia.org/w/index.php?title=File:ShipTracks_MODIS_2005may11.jpg License: Public Domain Contributors: Liam Gumley, Space Science and Engineering Center, University of Wisconsin-Madison File:Solar-cycle-data.png Source: http://en.wikipedia.org/w/index.php?title=File:Solar-cycle-data.png License: unknown Contributors: Beland, Dragons flight, Lampman, Lissajous, Mgc8, Nils Simon, WikipediaMaster, Xenoforme, Xiong Chiamiov, 4 anonymous edits Image:Global Warming Predictions Map.jpg Source: http://en.wikipedia.org/w/index.php?title=File:Global_Warming_Predictions_Map.jpg License: unknown Contributors: 555, Adi, AstroImager001, Dilaudid, Dragons flight, Infrogmation, Jrtayloriv, LX, Pflatau, Toony, 10 anonymous edits File:Glacier Mass Balance.png Source: http://en.wikipedia.org/w/index.php?title=File:Glacier_Mass_Balance.png License: unknown Contributors: Autopilot, Bender235, Dgroseth, Dragons flight, Gaf.arq, Glenn, Nils Simon, W!B:, 1 anonymous edits File:Stabilizing the atmospheric concentration of carbon dioxide at a constant level would require emissions to be effectively eliminated (vertical).png Source: http://en.wikipedia.org/w/index.php?title=File:Stabilizing_the_atmospheric_concentration_of_carbon_dioxide_at_a_constant_level_would_require_emissions_to_be_effectively_eliminated_(vertical).png License: Public Domain Contributors: U.S. Climate Change Science Program and the Subcommittee on Global Change Research (Granger Morgan, H. Dowlatabadi, M. Henrion, D. Keith, R. Lempert, S. McBride, M. Small, T. Wilbanks (eds.)). National Oceanic and Atmospheric Administration, Washington D.C., USA. Image Sources, Licenses and Contributors 77
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