Accounting for Economic Activities in Large Marine Ecosystems and Regional Seas
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
The Mean Flow Field of the Tropical Atlantic Ocean
Deep-Sea Research II 46 (1999) 279—303 The mean flow field of the tropical Atlantic Ocean Lothar Stramma*, Friedrich Schott Institut fu( r Meereskunde, an der Universita( t Kiel, Du( sternbrooker Weg 20, 24105 Kiel, Germany Received 26 August 1997; received in revised form 31 July 1998 Abstract The mean horizontal flow field of the tropical Atlantic Ocean is described between 20°N and 20°S from observations and literature results for three layers of the upper ocean, Tropical Surface Water, Central Water, and Antarctic Intermediate Water. Compared to the subtropical gyres the tropical circulation shows several zonal current and countercurrent bands of smaller meridional and vertical extent. The wind-driven Ekman layer in the upper tens of meters of the ocean masks at some places the flow structure of the Tropical Surface Water layer as is the case for the Angola Gyre in the eastern tropical South Atlantic. Although there are regions with a strong seasonal cycle of the Tropical Surface Water circulation, such as the North Equatorial Countercurrent, large regions of the tropics do not show a significant seasonal cycle. In the Central Water layer below, the eastward North and South Equatorial undercurrents appear imbedded in the westward-flowing South Equatorial Current. The Antarcic Intermediate Water layer contains several zonal current bands south of 3°N, but only weak flow exists north of 3°N. The sparse available data suggest that the Equatorial Intermediate Current as well as the Southern and Northern Intermediate Countercurrents extend zonally across the entire equatorial basin. Due to the convergence of northern and southern water masses, the western tropical Atlantic north of the equator is an important site for the mixture of water masses, but more work is needed to better understand the role of the various zonal under- and countercur- rents in cross-equatorial water mass transfer. -
Body Size and Biomass Distributions of Carrion Visiting Beetles: Do Cities Host Smaller Species?
Ecol Res (2008) 23: 241–248 DOI 10.1007/s11284-007-0369-9 ORIGINAL ARTICLE Werner Ulrich Æ Karol Komosin´ski Æ Marcin Zalewski Body size and biomass distributions of carrion visiting beetles: do cities host smaller species? Received: 15 November 2006 / Accepted: 14 February 2007 / Published online: 28 March 2007 Ó The Ecological Society of Japan 2007 Abstract The question how animal body size changes Introduction along urban–rural gradients has received much attention from carabidologists, who noticed that cities harbour Animal and plant body size is correlated with many smaller species than natural sites. For Carabidae this aspects of life history traits and species interactions pattern is frequently connected with increasing distur- (dispersal, reproduction, energy intake, competition; bance regimes towards cities, which favour smaller Brown et al. 2004; Brose et al. 2006). Therefore, species winged species of higher dispersal ability. However, body size distributions (here understood as the fre- whether changes in body size distributions can be gen- quency distribution of log body size classes, SSDs) are eralised and whether common patterns exist are largely often used to infer patterns of species assembly and unknown. Here we report on body size distributions of energy use (Peters 1983; Calder 1984; Holling 1992; carcass-visiting beetles along an urban–rural gradient in Gotelli and Graves 1996; Etienne and Olff 2004; Ulrich northern Poland. Based on samplings of 58 necrophages 2005a, 2006). and 43 predatory beetle species, mainly of the families Many of the studies on local SSDs focused on the Catopidae, Silphidae, and Staphylinidae, we found number of modes and the shape. -
Fronts in the World Ocean's Large Marine Ecosystems. ICES CM 2007
- 1 - This paper can be freely cited without prior reference to the authors International Council ICES CM 2007/D:21 for the Exploration Theme Session D: Comparative Marine Ecosystem of the Sea (ICES) Structure and Function: Descriptors and Characteristics Fronts in the World Ocean’s Large Marine Ecosystems Igor M. Belkin and Peter C. Cornillon Abstract. Oceanic fronts shape marine ecosystems; therefore front mapping and characterization is one of the most important aspects of physical oceanography. Here we report on the first effort to map and describe all major fronts in the World Ocean’s Large Marine Ecosystems (LMEs). Apart from a geographical review, these fronts are classified according to their origin and physical mechanisms that maintain them. This first-ever zero-order pattern of the LME fronts is based on a unique global frontal data base assembled at the University of Rhode Island. Thermal fronts were automatically derived from 12 years (1985-1996) of twice-daily satellite 9-km resolution global AVHRR SST fields with the Cayula-Cornillon front detection algorithm. These frontal maps serve as guidance in using hydrographic data to explore subsurface thermohaline fronts, whose surface thermal signatures have been mapped from space. Our most recent study of chlorophyll fronts in the Northwest Atlantic from high-resolution 1-km data (Belkin and O’Reilly, 2007) revealed a close spatial association between chlorophyll fronts and SST fronts, suggesting causative links between these two types of fronts. Keywords: Fronts; Large Marine Ecosystems; World Ocean; sea surface temperature. Igor M. Belkin: Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, Rhode Island 02882, USA [tel.: +1 401 874 6533, fax: +1 874 6728, email: [email protected]]. -
Red Sea Large Marine Ecosystem (Lme
III-6 Red Sea: LME #33 S. Heileman and N. Mistafa The Red Sea LME is bordered by Djibouti, Egypt, Eritrea, Israel, Jordan, Saudi Arabia, Sudan and Yemen. It has a surface area of 458,620 km2, of which 2.33% is protected and includes 3.8% of the world’s coral reefs (Sea Around Us 2007). It is characterised by dense, salty water formed by net evaporation with rates up to 1.4 - 2.0 m yr-1 (Hastenrath & Lamb 1979) and deep convection in the northern sector resulting in the formation of a deep water mass flowing out into the Gulf of Aden underneath a layer of less saline inflowing water (Morcos 1970). A dominant phenomenon affecting the oceanography and meteorology of the region is the Arabian monsoon. In winter, northeast monsoon winds extend well into the Gulf of Aden and the southern Red Sea, causing a seasonal reversal in the winds over this entire region (Patzert 1974). The seasonal monsoon reversal and the local coastal configuration combine in summer to force a radically different circulation pattern composed of a thin surface outflow, an intermediate inflowing layer of Gulf of Aden thermocline water and a vastly reduced (often extinguished) outflowing deep layer (Patzert 1974). Within the basin itself, the general surface circulation is cyclonic (Longhurst 1998). High evaporation and low precipitation maintain the Red Sea LME as one of the most saline water masses of the world oceans, with a mean surface salinity of 42.5 ppt and a mean temperature of 30° C during the summer (Sofianos et al. -
Fisheries in Large Marine Ecosystems: Descriptions and Diagnoses
Fisheries in Large Marine Ecosystems: Descriptions and Diagnoses D. Pauly, J. Alder, S. Booth, W.W.L. Cheung, V. Christensen, C. Close, U.R. Sumaila, W. Swartz, A. Tavakolie, R. Watson, L. Wood and D. Zeller Abstract We present a rationale for the description and diagnosis of fisheries at the level of Large Marine Ecosystems (LMEs), which is relatively new, and encompasses a series of concepts and indicators different from those typically used to describe fisheries at the stock level. We then document how catch data, which are usually available on a smaller scale, are mapped by the Sea Around Us Project (see www.seaaroundus.org) on a worldwide grid of half-degree lat.-long. cells. The time series of catches thus obtained for over 180,000 half-degree cells can be regrouped on any larger scale, here that of LMEs. This yields catch time series by species (groups) and LME, which began in 1950 when the FAO started collecting global fisheries statistics, and ends in 2004 with the last update of these datasets. The catch data by species, multiplied by ex-vessel price data and then summed, yield the value of the fishery for each LME, here presented as time series by higher (i.e., commercial) groups. Also, these catch data can be used to evaluate the primary production required (PPR) to sustain fisheries catches. PPR, when related to observed primary production, provides another index for assessing the impact of the countries fishing in LMEs. The mean trophic level of species caught by fisheries (or ‘Marine Trophic Index’) is also used, in conjunction with a related indicator, the Fishing-in-Balance Index (FiB), to assess changes in the species composition of the fisheries in LMEs. -
Plants Are Producers! Draw the Different Producers Below
Name: ______________________________ The Unique Producer Every food chain begins with a producer. Plants are producers. They make their own food, which creates energy for them to grow, reproduce and survive. Being able to make their own food makes them unique; they are the only living things on Earth that can make their own source of food energy. Of course, they require sun, water and air to thrive. Given these three essential ingredients, you will have a healthy plant to begin the food chain. All plants are producers! Draw the different producers below. Apple Tree Rose Bushes Watermelon Grasses Plant Blueberry Flower Fern Daisy Bush List the three essential needs that every producer must have in order to live. © 2009 by Heather Motley Name: ______________________________ Producers can make their own food and energy, but consumers are different. Living things that have to hunt, gather and eat their food are called consumers. Consumers have to eat to gain energy or they will die. There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need. Animals like whales, elephants, cows, pigs, rabbits, and horses are herbivores. Carnivores are living things that only eat meat. Animals like owls, tigers, sharks and cougars are carnivores. You would not catch a plant in these animals’ mouths. Then, we have the omnivores. Omnivores will eat both plants and animals to get energy. Whichever food source is abundant or available is what they will eat. Animals like the brown bear, dogs, turtles, raccoons and even some people are omnivores. -
Resolving Geographic Expansion in the Marine Trophic Index
Vol. 512: 185–199, 2014 MARINE ECOLOGY PROGRESS SERIES Published October 9 doi: 10.3354/meps10949 Mar Ecol Prog Ser Contribution to the Theme Section ‘Trophodynamics in marine ecology’ FREEREE ACCESSCCESS Region-based MTI: resolving geographic expansion in the Marine Trophic Index K. Kleisner1,3,*, H. Mansour2,3, D. Pauly1 1Sea Around Us Project, Fisheries Centre, University of British Columbia, 2202 Main Mall, Vancouver, BC V6T 1Z4, Canada 2Earth and Ocean Sciences, University of British Columbia, 2207 Main Mall, Vancouver, BC V6T 1Z4, Canada 3Present address: NOAA, Northeast Fisheries Science Center, 166 Water St., Woods Hole, MA 02543, USA ABSTRACT: The Marine Trophic Index (MTI), which tracks the mean trophic level of fishery catches from an ecosystem, generally, but not always, tracks changes in mean trophic level of an ensemble of exploited species in response to fishing pressure. However, one of the disadvantages of this indicator is that declines in trophic level can be masked by geographic expansion and/or the development of offshore fisheries, where higher trophic levels of newly accessed resources can overwhelm fishing-down effects closer inshore. Here, we show that the MTI should not be used without accounting for changes in the spatial and bathymetric reach of the fishing fleet, and we develop a new index that accounts for the potential geographic expansion of fisheries, called the region-based MTI (RMTI). To calculate the RMTI, the potential catch that can be obtained given the observed trophic structure of the actual catch is used to assess the fisheries in an initial (usu- ally coastal) region. When the actual catch exceeds the potential catch, this is indicative of a new fishing region being exploited. -
The Yellow Sea Ecoregion: a Global Biodiversity Treasure
THE YELLOW SEA ECOREGION: Yellow Sea Ecoregion A GLOBAL BIODIVERSITY TREASURE A global biodiversity treasure under pressure A regional strategy and action plan A global treasure, a global responsibility The Yellow Sea LME is an important global resource. This The global importance of the Yellow Sea Ecoregion has been international waterbody supports substantial populations of recognised by governments and the international community in fish, invertebrates, marine mammals, and seabirds. Among the recent years. Starting in 1992, the Chinese and South Korean world's 64 large marine ecosystems (LMEs), the Yellow Sea governments together developed a transboundary approach to LME has been one of the most significantly affected by human the management of the Yellow Sea area with the assistance of development. Large human populations live in the basins that UNDP, UNEP, the World Bank, and NOAA. In 2005, a UNDP/GEF drain into the Yellow Sea. Seaside cities with tens of millions project, the Yellow Sea Large Marine Ecosystem project, was of inhabitants include Qingdao, Tianjin, Dalian, Shanghai, officially launched with participation of the Chinese and South Seoul/Inchon, and Pyongyang-Nampo. People in these urban Korean governments. areas are dependent on the Yellow Sea as a source of food, Meanwhile, in 2002, WWF and other conservation NGOs and economic development, recreation, and tourism. research institutes in China, South Korea and Japan began an Yet the Yellow Sea is under serious threat from industrial and assessment of Yellow Sea Ecoregion biodiversity. The objective agricultural waste, extensive economic development in the of this regional partnership was to prioritise conservation actions coastal zone, the unsustainable exploitation of natural resources, based on scientific data. -
Ecosystem Modelling in the Eastern Mediterranean Sea: the Cumulative Impact of Alien Species, Fishing and Climate Change on the Israeli Marine Ecosystem
Ecosystem modelling in the Eastern Mediterranean Sea: the cumulative impact of alien species, fishing and climate change on the Israeli marine ecosystem PhD Thesis 2019 Xavier Corrales Ribas Ecosystem modelling in the Eastern Mediterranean Sea: the cumulative impact of alien species, fishing and climate change on the Israeli marine ecosystem Modelización ecológica en el Mediterráneo oriental: el impacto acumulado de las especies invasoras, la pesca y el cambio climáti co en el ecosistema marino de Israel Memoria presentada por Xavier Corrales Ribas para optar al título de Doctor por la Universidad Politécnica de Cataluña (UPC) dentro del Programa de Doctorado de Ciencias del Mar Supervisores de tesis: Dr. Marta Coll Montón. Instituto de Ciencias del Mar (ICM-CSIC), Barcelona, España Dr. Gideon Gal. Centro de Investigación Oceanográfica y Limnológica de Israel (IOLR), Migdal, Israel Tutor: Dr. Manuel Espino Infantes. Universidad Politécnica de Cataluña (UPC), Barcelona, España Enero 2019 This PhD thesis has been framed within the project DESSIM ( A Decision Support system for the management of Israel’s Mediterranean Exclusive Economic Zone ) through a grant from the Israel Oceanographic and Limnological Research Institute (IORL). The PhD has been carried out at the Kinneret Limnological Laboratory (IOLR) (Migdal, Israel) and the Institute of Marine Science (ICM-CSIC) (Barcelona, Spain). The project team included Gideon Gal (Kinneret Limnological Laboratory, IORL, Israel) who was the project coordinator and co-director of this thesis, Marta Coll (ICM- CSIC, Spain), who was co-director of this thesis, Sheila Heymans (Scottish Association for Marine Science, UK), Jeroen Steenbeek (Ecopath International Initiative research association, Spain), Eyal Ofir (Kinneret Limnological Laboratory, IORL, Israel) and Menachem Goren and Daphna DiSegni (Tel Aviv University, Israel). -
Can More K-Selected Species Be Better Invaders?
Diversity and Distributions, (Diversity Distrib.) (2007) 13, 535–543 Blackwell Publishing Ltd BIODIVERSITY Can more K-selected species be better RESEARCH invaders? A case study of fruit flies in La Réunion Pierre-François Duyck1*, Patrice David2 and Serge Quilici1 1UMR 53 Ӷ Peuplements Végétaux et ABSTRACT Bio-agresseurs en Milieu Tropical ӷ CIRAD Invasive species are often said to be r-selected. However, invaders must sometimes Pôle de Protection des Plantes (3P), 7 chemin de l’IRAT, 97410 St Pierre, La Réunion, France, compete with related resident species. In this case invaders should present combina- 2UMR 5175, CNRS Centre d’Ecologie tions of life-history traits that give them higher competitive ability than residents, Fonctionnelle et Evolutive (CEFE), 1919 route de even at the expense of lower colonization ability. We test this prediction by compar- Mende, 34293 Montpellier Cedex, France ing life-history traits among four fruit fly species, one endemic and three successive invaders, in La Réunion Island. Recent invaders tend to produce fewer, but larger, juveniles, delay the onset but increase the duration of reproduction, survive longer, and senesce more slowly than earlier ones. These traits are associated with higher ranks in a competitive hierarchy established in a previous study. However, the endemic species, now nearly extinct in the island, is inferior to the other three with respect to both competition and colonization traits, violating the trade-off assumption. Our results overall suggest that the key traits for invasion in this system were those that *Correspondence: Pierre-François Duyck, favoured competition rather than colonization. CIRAD 3P, 7, chemin de l’IRAT, 97410, Keywords St Pierre, La Réunion Island, France. -
Northwest African Upwelling Scenario
OCEANOLOGICA ACTA ⋅ VOL. 24 – Supplement Northwest African upwelling scenario Eberhard HAGEN* Baltic Sea Research Institute, Seestrasse 15, 18119 Warnemuende, Germany Received 24 December 1999; revised 15 May 2000; accepted 16 May 2000 Abstract − Observations, hypotheses and derived scenarios are discussed for the Northwest-African coastal upwelling area. The process of coastal upwelling is considered to be composed of a climatic steady-state part and fluctuations acting on different spatial and temporal scales. Attention is focused on disturbances acting globally on the inter-annual time-scale. El Niño-like changes occur in the system of trade winds and modify the equatorial regime of currents as well as the coastal upwelling regimes on both flanks of the Inter-tropical Convergence Zone. There is an opposite thermal response in near-surface layers along the zonal coast in the Gulf of Guinea and along the meridional coast off NW-Africa. Off the continental slope of Senegal and Mauritania, the poleward undercurrent is linked with the system of eastward flowing equatorial undercurrents via the transport of South Atlantic Central Water (SACW) around the eastern flank of the Guinea Dome. The upwelling undercurrent partly feeds its SACW properties into the belt of coastal upwelling and contributes significantly to the biological productivity during ‘normal’ and ‘abnormal’ upwelling years. Future investigations should focus on changes in the time-scale of decades. © 2001 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS Résumé − Upwelling au nord-ouest de l‘Afrique. La zone d’upwelling située au nord-ouest des côtes africaines est étudiée dans le cadre d‘une discussion portant sur les observations, les hypothèses et les scénarios qui en dérivent. -
Mapping Climatological Seasonal Variations of Surface Currents in the Tropical Atlantic Using Ship Drifts
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 91, NO. C9, PAGES 10,537-10,550, SEPTEMBER 15, 1986 Mapping Climatological Seasonal Variations of Surface Currents in the Tropical Atlantic Using Ship Drifts PHILIP L. RICHARDSON AND DAVID WALSH Woods Hole Oceanographic Institution, Woods Hole, Massachusetts The seasonal variability of current velocities in the tropical Atlantic was studied by grouping ship drift velocity observations into 2ø x 5ø boxes and calculating monthly mean velocity values. These values were used to calculate and map the annual mean velocity, the seasonal variation about the mean, the annual and semiannual harmonics, and the first two empirical orthogonal functions (EOFs). The seasonal variation is primarily zonal in the equatorial band and in the North Equatorial Countercurrent (NECC) and primarily alongshore near the coast of South America. Maxima of seasonal variation of 23 cm/s are centered in the NECC near 6øN, 42.5øW and in the Gulf of Guinea near 2øN, 7.5øW. Most (-80%) of the variance in the NECC and along the western boundary of the area studied has an annual period; most of the variance along the equator in the mid-Atlantic has a semiannual period. Over the whole region, 49% of the seasonalvariance is explained by the annual harmonic, and 69% is explained by a combination of the annual and semiannual harmonics. The second EOF contains 29% of the variance of the data set and shows a simultaneousspeeding (slowing) of the major equatorial currents (the South Equatorial Current (SEC), the North Brazil Current, the NECC, and the Guinea Current) along their principal axes of variation with a concurrent slowing (speeding) of the Guyana Current and the Brazil Current.