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Intra-Guild Predation and Cannibalism of Harmonia Axyridis and Adalia Bipunctata in Choice Conditions
Bulletin of Insectology 56 (2): 207-210, 2003 ISSN 1721-8861 Intra-guild predation and cannibalism of Harmonia axyridis and Adalia bipunctata in choice conditions Fabrizio SANTI, Giovanni BURGIO, Stefano MAINI Dipartimento di Scienze e Tecnologie Agroambientali - Entomologia, Università di Bologna, Italy Abstract A laboratory experiment was carried out to examine intra-guild predation and cannibalism of exotic Harmonia axyridis (Pallas) and the native species Adalia bipunctata L. (Coleoptera Coccinellidae) in choice condition. Experiments were carried out in glass petri dishes at 25°C, 70% RH, using a 5x4 grid with 10 eggs of exotic and 10 of natives arranged alternatively. One larva or adult of coccinellid was put in the arena and was observed for one hour. Each experiment was replicated 15 times. H. axyridis larvae and adults, and A. bipunctata adults, showed a preference to prey and eat their own eggs rather than interspecific eggs; these dif- ferences were detected for both naive and experienced females and larvae. For A. bipunctata larvae no differences were observed between IGP and CANN in choice conditions. The results indicate a tendency for both species to attack and eat their own eggs rather than interspecific eggs. The risk of introduction of exotic generalist predators is discussed, with particular attention to coc- cinellids. Laboratory experiments on intra-guild predation could give a preliminary indication of the potential for competition between an exotic ladybird and a native one. Key words: Adalia bipunctata, cannibalism, choice test, Harmonia axyridis, intra-guild predation, biological control. Introduction cinellidae) were examined in laboratory experiments in no choice condition on eggs and on larvae (Burgio et The Asiatic polyphagous ladybird Harmonia axyridis al., 2002; Burgio et al., submitted for publication). -
Effects of Human Disturbance on Terrestrial Apex Predators
diversity Review Effects of Human Disturbance on Terrestrial Apex Predators Andrés Ordiz 1,2,* , Malin Aronsson 1,3, Jens Persson 1 , Ole-Gunnar Støen 4, Jon E. Swenson 2 and Jonas Kindberg 4,5 1 Grimsö Wildlife Research Station, Department of Ecology, Swedish University of Agricultural Sciences, SE-730 91 Riddarhyttan, Sweden; [email protected] (M.A.); [email protected] (J.P.) 2 Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Postbox 5003, NO-1432 Ås, Norway; [email protected] 3 Department of Zoology, Stockholm University, SE-10691 Stockholm, Sweden 4 Norwegian Institute for Nature Research, NO-7485 Trondheim, Norway; [email protected] (O.-G.S.); [email protected] (J.K.) 5 Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden * Correspondence: [email protected] Abstract: The effects of human disturbance spread over virtually all ecosystems and ecological communities on Earth. In this review, we focus on the effects of human disturbance on terrestrial apex predators. We summarize their ecological role in nature and how they respond to different sources of human disturbance. Apex predators control their prey and smaller predators numerically and via behavioral changes to avoid predation risk, which in turn can affect lower trophic levels. Crucially, reducing population numbers and triggering behavioral responses are also the effects that human disturbance causes to apex predators, which may in turn influence their ecological role. Some populations continue to be at the brink of extinction, but others are partially recovering former ranges, via natural recolonization and through reintroductions. -
Debris the Science and Changing Perceptions of Dead Trees by Alexander Evans and Robert Perschel
An Appreciation of Debris The Science and Changing Perceptions of Dead Trees By Alexander Evans and Robert Perschel oarse woody debris. To most people, two Coarse woody debris (CWD) is wood in the forest that’s no of the three words in that phrase have longer part of a living tree. Rather than being dead, this wood negative connotations. Debris is the worst is an important source of life in the forest. Foresters who value offender, suggesting random junk strewn it for its ecological functions have been searching for new terms about. When the debris is coarse, it’s even for CWD, and you’ll hear it referred to as biomass, dead wood, worse – it’s unrefined, it’s big. coarse woody material, and even retained organic matter. VIRGINIA BARLOW 44 Northern Woodlands / Winter 2008 Harry Dwyer, a forester in Fayette, Maine, likens the lan- as a seed bed for trees and plants, a mulch layer, and a slow- guage predicament to that of another formerly maligned mate- release fertilizer. Decomposing fungi depend on dead wood for rial: garden waste. He said, “You could look at a pile of rotting nutrients and moisture, and in turn many trees rely on mutu- vegetables as garbage, or you could note its value and call it alistic relationships with mycorrhizal fungi. Nitrogen fixation compost.” Digging into a rotten log in his woodlot, Dwyer in CWM by microbes (both anaerobic and microaerophyllic displays some of the dark, wet material in his hand. “It doesn’t bacteria) provides this important element in both terrestrial matter what you call this – coarse woody debris, coarse woody and aquatic ecosystems. -
AN ABSTRACT of the THESIS of Douglas William Havlina for The
AN ABSTRACT OF THE THESIS OF Douglas William Havlina for the degree of Master of Science in Rangeland Resources presented on January 27, 1995 Title: Fire Effects on Vegetation Diversity, Structure, and Successional Dynamics in Shrub-Steppe and Mixed Conifer Environments of the Hells Canyon, Idaho. Abstract approved: The effects of fire severity on post-fire succession and shrub demography were quantified in shrub-steppe grasslands and subalpine forests in the Hells Canyon of the Payette National Forest, Idaho. Following the 1988 Eagle Bar Fire, species frequency, community diversity, fire adaptations, and stand ages were quantified at 12 plots in burned and unburned forests. Pre-fire composition was dominated by Pseudotsuga menziesii, Pinus contorta, Abies grandis, and Abies lasiocarpa in the overstory. Pre- fire basal area ranged from 41 to 80 m 2 ha-1 . Pre-fire stand ages ranged from 71 years in Abies lasiocarpa forests to > 200 years in Pseudotsuga menziesii stands. Fire scenarios which were sampled consisted of: (1) complete stand-replacement fires; (2) partial stand- replacement fires; and (3) unburned forests (control). Partial stand-replacement forests were characterized by significantly higher mean species diversity and richness (H'=3.16, S=36) than complete stand-replacement (H'=2.78, S=27) or unburned forests (H=2.26, S=15). Vegetation preferentially established in burned areas along a gradient of fire severity according to adapted fire guilds. Single-storied forests dominated by Pinus contorta and Abies lasiocarpa typified stand-replacement fire scenarios, with mean ages ranging from 99 to 159 years corresponding to fire return intervals common in this type. -
Influence of Coarse Woody Debris on Seedlings and Saplings in A
INFLUENCE OF COARSE WOODY DEBRIS ON SEEDLINGS AND SAPLINGS IN A PINUS PALUSTRIS WOODLAND by ALEXANDRA LOGAN JUSTIN L. HART, COMMITTEE CHAIR MATTHEW C. LAFEVOR ARVIND A.R. BHUTA A THESIS Submitted in partial fulfillment of the requirements for the degree of Master of Science in the Department of Geography in the Graduate School of The University of Alabama TUSCALOOSA, ALABAMA 2020 Copyright Alexandra Logan 2020 ALL RIGHTS RESERVED 2 ABSTRACT Coarse woody debris (CWD) has beneficial effects on plant growth and establishment. Longleaf pine (Pinus palustris Mill.) stands support relatively low amounts of CWD — 2 to 30 m3 ha-1. In April 2011, an EF3 tornado passed through the Oakmulgee Ranger District of the Talladega National Forest in the Fall Line Hills of Alabama. This disturbance resulted in the large addition of CWD to a longleaf pine woodland, and a rare opportunity to analyze how CWD can influence a managed, pine woodland. The goal of this study was to examine the effect of CWD on woody plant richness, density, and growth rate (quantified by height) in a longleaf pine woodland that experienced a catastrophic wind disturbance. A total of three 1 m2 quadrats were established against either side of a piece of CWD (> 3 m in length and ≥ 10 cm in diameter). Another quadrat was established at least 3 m away from the focal CWD piece. For each plot, the presence and height of every woody plant (< 5 cm dbh) were recorded. Sapling density, oak and hickory density, and organic matter were all found to be significantly higher in quadrats adjacent to CWD than away (all p < 0.05). -
Structure of Tropical River Food Webs Revealed by Stable Isotope Ratios
OIKOS 96: 46–55, 2002 Structure of tropical river food webs revealed by stable isotope ratios David B. Jepsen and Kirk O. Winemiller Jepsen, D. B. and Winemiller, K. O. 2002. Structure of tropical river food webs revealed by stable isotope ratios. – Oikos 96: 46–55. Fish assemblages in tropical river food webs are characterized by high taxonomic diversity, diverse foraging modes, omnivory, and an abundance of detritivores. Feeding links are complex and modified by hydrologic seasonality and system productivity. These properties make it difficult to generalize about feeding relation- ships and to identify dominant linkages of energy flow. We analyzed the stable carbon and nitrogen isotope ratios of 276 fishes and other food web components living in four Venezuelan rivers that differed in basal food resources to determine 1) whether fish trophic guilds integrated food resources in a predictable fashion, thereby providing similar trophic resolution as individual species, 2) whether food chain length differed with system productivity, and 3) how omnivory and detritivory influenced trophic structure within these food webs. Fishes were grouped into four trophic guilds (herbivores, detritivores/algivores, omnivores, piscivores) based on literature reports and external morphological characteristics. Results of discriminant function analyses showed that isotope data were effective at reclassifying individual fish into their pre-identified trophic category. Nutrient-poor, black-water rivers showed greater compartmentalization in isotope values than more productive rivers, leading to greater reclassification success. In three out of four food webs, omnivores were more often misclassified than other trophic groups, reflecting the diverse food sources they assimilated. When fish d15N values were used to estimate species position in the trophic hierarchy, top piscivores in nutrient-poor rivers had higher trophic positions than those in more productive rivers. -
Species Trophic Guild – Nutritional Mode Reference(S) Annelida Polychaeta Siboglinidae Ridgeia Piscesae Symbiotic Jones (1985)*; Southward Et Al
Species Trophic guild – nutritional mode Reference(s) Annelida Polychaeta Siboglinidae Ridgeia piscesae Symbiotic Jones (1985)*; Southward et al. (1995); Bergquist et al. (2007); this study Maldanidae Nicomache venticola Bacterivore – surface deposit feeder or grazer Blake and Hilbig (1990)*; Bergquist et al. (2007); this study Dorvilleidae Ophryotrocha globopalpata Predator Blake and Hilbig (1990)*; Bergquist et al. (2007); this study Orbiniidae Berkeleyia sp. nov. Scavenger/detritivore – suspension feeder Jumars et al. (2015); this study Hesionidae Hesiospina sp. nov.a Predator Bonifácio et al. (2018)*; this study Phyllodocidae Protomystides verenae Predator Blake and Hilbig (1990)*; Bergquist et al. (2007); this study Polynoidae Branchinotogluma tunnicliffeae Predator Pettibone (1988)*; Bergquist et al. (2007); this study Branchinotogluma sp. Predator – Lepidonotopodium piscesae Predator Pettibone (1988)*; Levesque et al. (2006); Bergquist et al. (2007); this study Levensteiniella kincaidi Predator Pettibone (1985)*; Bergquist et al. (2007); this study Sigalionidae Pholoe courtneyae Predator Blake (1995)*; Sweetman et al. (2013) Syllidae Sphaerosyllis ridgensis Predator Blake and Hilbig (1990)*; Bergquist et al. (2007); this study Alvinellidae Paralvinella dela Bacterivore – surface deposit feeder or grazer; suspension feeder Detinova (1988)*; this study Paralvinella palmiformis Bacterivore – surface deposit feeder or grazer; suspension feeder Desbruyères and Laubier (1986*, 1991); Levesque et al. (2003); this study Paralvinella pandorae Bacterivore – surface deposit feeder or grazer; suspension feeder Desbruyères and Laubier (1986*, 1991); Levesque et al. (2003); this study Paralvinella sulfincola Bacterivore – surface deposit feeder or grazer; suspension feeder Tunnicliffe et al. (1993)*; Levesque et al. (2003); this study Ampharetidae Amphisamytha carldarei Scavenger/detritivore – surface deposit feeder or grazer Stiller et al. (2013)*; McHugh and Tunnicliffe (1994); Bergquist et al. -
Ecological Thresholds: the Key to Successful Environmental Management Or an Important Concept with No Practical Application?
Ecosystems (2006) 9: 1–13 DOI: 10.1007/s10021-003-0142-z MINI REVIEW Ecological Thresholds: The Key to Successful Environmental Management or an Important Concept with No Practical Application? Peter M. Groffman,1* Jill S. Baron,2 Tamara Blett,3 Arthur J. Gold,4 Iris Goodman,5 Lance H. Gunderson,6 Barbara M. Levinson,5 Margaret A. Palmer,7 Hans W. Paerl,8 Garry D. Peterson,9 N. LeRoy Poff,10 David W. Rejeski,11 James F. Reynolds,12 Monica G. Turner,13 Kathleen C. Weathers,1 and John Wiens14 1Institute of Ecosystem Studies, Box AB, Millbrook, New York 12545, USA; 2Natural Resource Ecology Laboratory, US Geological Survey, Colorado State University, Fort Collins, Colorado 80523-1499, USA; 3Air Resources Division, USDI-National Park Service, Academy Place, Room 450, P.O. Box 25287 Denver, Colorado 80225-0287, USA; 4Department of Natural Resources Science, 105 Coastal Institute in Kingston, University of Rhode Island, One Greenhouse Road, Kingston, Rhode Island 02881, USA 5US Environmental Protection Agency Headquarters, Ariel Rios Building, 1200 Pennsylvania Avenue, NW, Washington, DC 20460, USA; 6Department of Environmental Studies, Emory University, 400 Dowman Drive, Atlanta, Georgia 30322, USA; 7University of Maryland, Plant Sciences Building 4112, College Park, Maryland 20742-4415, USA; 8Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, North Carolina 28557, USA; 9Center for Limnology, University of Wisconsin, 680 N. Park St., Madison, Wisconsin 53706, USA; 10Department of -
Life-History Strategies Predict Fish Invasions and Extirpations in the Colorado River Basin
Ecological Monographs, 76(1), 2006, pp. 25±40 q 2006 by the Ecological Society of America LIFE-HISTORY STRATEGIES PREDICT FISH INVASIONS AND EXTIRPATIONS IN THE COLORADO RIVER BASIN JULIAN D. OLDEN,1,3 N. LEROY POFF,1 AND KEVIN R. BESTGEN2 1Graduate Degree Program in Ecology, Department of Biology, Colorado State University, Fort Collins, Colorado 80523 USA 2Larval Fish Laboratory, Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80523 USA Abstract. Understanding the mechanisms by which nonnative species successfully in- vade new regions and the consequences for native fauna is a pressing ecological issue, and one for which niche theory can play an important role. In this paper, we quantify a com- prehensive suite of morphological, behavioral, physiological, trophic, and life-history traits for the entire ®sh species pool in the Colorado River Basin to explore a number of hypotheses regarding linkages between human-induced environmental change, the creation and mod- i®cation of ecological niche opportunities, and subsequent invasion and extirpation of species over the past 150 years. Speci®cally, we use the ®sh life-history model of K. O. Winemiller and K. A. Rose to quantitatively evaluate how the rates of nonnative species spread and native species range contraction re¯ect the interplay between overlapping life- history strategies and an anthropogenically altered adaptive landscape. Our results reveal a number of intriguing ®ndings. First, nonnative species are located throughout the adaptive surface de®ned by the life-history attributes, and they surround the ecological niche volume represented by the native ®sh species pool. Second, native species that show the greatest distributional declines are separated into those exhibiting strong life-history overlap with nonnative species (evidence for biotic interactions) and those having a periodic strategy that is not well adapted to present-day modi®ed environmental conditions. -
Human Involvement in Food Webs*
EG35CH01-Strong ARI 13 September 2010 10:20 Human Involvement in Food Webs∗ Donald R. Strong1 and Kenneth T. Frank2 1Department of Evolution and Ecology, University of California, Davis, California 95616; email: [email protected] 2Bedford Institute of Oceanography, Ocean Sciences Division, Dartmouth, Nova Scotia B2Y 4A2, Canada; email: [email protected] Annu. Rev. Environ. Resour. 2010. 35:1–23 Key Words First published online as a Review in Advance on bottom-up, fisheries, intraguild predation, mesopredator, top-down, July 1, 2010 trophic cascade The Annual Review of Environment and Resources is online at environ.annualreviews.org Abstract This article’s doi: Human involvement in food webs has been profound, bringing about 10.1146/annurev-environ-031809-133103 enormous and disproportionate losses of large apex predators on land Copyright c 2010 by Annual Reviews. and in water. The losses have modified or even eliminated concatena- All rights reserved tions of indirect interactions propagating from predators to herbivores 1543-5938/10/1121-0001$20.00 to plants, inter alia. Food webs are a synthesis of bottom-up energy and ∗This article was co-authored by an employee of nutrient flow from plant producers to consumers and top-down regula- a British Commonwealth government as part of tion of producers by consumers. The trophic cascade is the simplest top- his official duties and is therefore subject to down interaction and accounts for a great deal of what is known about Crown Copyright. food webs. In three-link cascades, predators suppress herbivores, re- leasing plants. In longer cascades, predators can suppress smaller meso- by UNIVERSITY OF IDAHO LIBRARY on 03/21/11. -
Bibliography
Bibliography Abella, S. R. 2010. Disturbance and plant succession in the Mojave and Sonoran Deserts of the American Southwest. International Journal of Environmental Research and Public Health 7:1248—1284. Abella, S. R., D. J. Craig, L. P. Chiquoine, K. A. Prengaman, S. M. Schmid, and T. M. Embrey. 2011. Relationships of native desert plants with red brome (Bromus rubens): Toward identifying invasion-reducing species. Invasive Plant Science and Management 4:115—124. Abella, S. R., N. A. Fisichelli, S. M. Schmid, T. M. Embrey, D. L. Hughson, and J. Cipra. 2015. Status and management of non-native plant invasion in three of the largest national parks in the United States. Nature Conservation 10:71—94. Available: https://doi.org/10.3897/natureconservation.10.4407 Abella, S. R., A. A. Suazo, C. M. Norman, and A. C. Newton. 2013. Treatment alternatives and timing affect seeds of African mustard (Brassica tournefortii), an invasive forb in American Southwest arid lands. Invasive Plant Science and Management 6:559—567. Available: https://doi.org/10.1614/IPSM-D-13-00022.1 Abrahamson, I. 2014. Arctostaphylos manzanita. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory, Fire Effects Information System (Online). plants/shrub/arcman/all.html Ackerman, T. L. 1979. Germination and survival of perennial plant species in the Mojave Desert. The Southwestern Naturalist 24:399—408. Adams, A. W. 1975. A brief history of juniper and shrub populations in southern Oregon. Report No. 6. Oregon State Wildlife Commission, Corvallis, OR. Adams, L. 1962. Planting depths for seeds of three species of Ceanothus. -
Physico-Chemical Thresholds in the Distribution of Fish Species Among
Knowl. Manag. Aquat. Ecosyst. 2017, 418, 41 Knowledge & © V. Roubeix et al., Published by EDP Sciences 2017 Management of Aquatic DOI: 10.1051/kmae/2017032 Ecosystems www.kmae-journal.org Journal fully supported by Onema RESEARCH PAPER Physico-chemical thresholds in the distribution of fish species among French lakes Vincent Roubeix1,*, Martin Daufresne1, Christine Argillier1, Julien Dublon1, Anthony Maire1,a, Delphine Nicolas1,b, Jean-Claude Raymond2,3 and Pierre-Alain Danis2 1 Irstea, UR RECOVER, Pôle AFB-Irstea hydroécologie plans d’eau, Centre d’Aix-en-Provence, 3275 route Cézanne, 13182 Aix-en-Provence, France 2 Agence française pour la biodiversité, Pôle AFB-Irstea hydroécologie plans d’eau, 13182 Aix-en-Provence, France 3 Agence française pour la biodiversité, Délégation Régionale Rhône-Alpes, Unité Spécialisée Milieux Lacustres, 74200 Thonon-les-Bains, France Abstract – The management of lakes requires the definition of physico-chemical thresholds to be used for ecosystem preservation or restoration. According to the European Water Framework Directive, the limits between physico-chemicalquality classes must be set consistently with biological quality elements. Onewayto do this consists in analyzing the response of aquatic communities to environmental gradients across monitoring sites and in identifying ecological community thresholds, i.e. zones in the gradients where the species turnover is the highest. In this study, fish data from 196 lakes in France were considered to derive ecological thresholds using the multivariate method of gradient forest. The analysis was performed on 25 species and 36 environmental parameters. The results revealed the highest importance of maximal water temperature in the distributionoffishspecies.Otherimportantparametersincludedgeographicalfactors,dissolvedorganiccarbon concentrationandwater transparency,whilenutrients appearedto have lowinfluence.