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  • 1
    Publication Date: 2019
    Description: 〈p〉Human activities are fundamentally altering biodiversity. Projections of declines at the global scale are contrasted by highly variable trends at local scales, suggesting that biodiversity change may be spatially structured. Here, we examined spatial variation in species richness and composition change using more than 50,000 biodiversity time series from 239 studies and found clear geographic variation in biodiversity change. Rapid compositional change is prevalent, with marine biomes exceeding and terrestrial biomes trailing the overall trend. Assemblage richness is not changing on average, although locations exhibiting increasing and decreasing trends of up to about 20% per year were found in some marine studies. At local scales, widespread compositional reorganization is most often decoupled from richness change, and biodiversity change is strongest and most variable in the oceans.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2012-06-09
    Description: Evidence is mounting that extinctions are altering key processes important to the productivity and sustainability of Earth's ecosystems. Further species loss will accelerate change in ecosystem processes, but it is unclear how these effects compare to the direct effects of other forms of environmental change that are both driving diversity loss and altering ecosystem function. Here we use a suite of meta-analyses of published data to show that the effects of species loss on productivity and decomposition--two processes important in all ecosystems--are of comparable magnitude to the effects of many other global environmental changes. In experiments, intermediate levels of species loss (21-40%) reduced plant production by 5-10%, comparable to previously documented effects of ultraviolet radiation and climate warming. Higher levels of extinction (41-60%) had effects rivalling those of ozone, acidification, elevated CO(2) and nutrient pollution. At intermediate levels, species loss generally had equal or greater effects on decomposition than did elevated CO(2) and nitrogen addition. The identity of species lost also had a large effect on changes in productivity and decomposition, generating a wide range of plausible outcomes for extinction. Despite the need for more studies on interactive effects of diversity loss and environmental changes, our analyses clearly show that the ecosystem consequences of local species loss are as quantitatively significant as the direct effects of several global change stressors that have mobilized major international concern and remediation efforts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hooper, David U -- Adair, E Carol -- Cardinale, Bradley J -- Byrnes, Jarrett E K -- Hungate, Bruce A -- Matulich, Kristin L -- Gonzalez, Andrew -- Duffy, J Emmett -- Gamfeldt, Lars -- O'Connor, Mary I -- England -- Nature. 2012 May 2;486(7401):105-8. doi: 10.1038/nature11118.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Western Washington University, Bellingham, Washington 98225-9160, USA. hooper@biol.wwu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22678289" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Ecology ; *Ecosystem ; *Extinction, Biological ; Models, Biological
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2015-05-02
    Description: Marine taxa are threatened by anthropogenic impacts, but knowledge of their extinction vulnerabilities is limited. The fossil record provides rich information on past extinctions that can help predict biotic responses. We show that over 23 million years, taxonomic membership and geographic range size consistently explain a large proportion of extinction risk variation in six major taxonomic groups. We assess intrinsic risk-extinction risk predicted by paleontologically calibrated models-for modern genera in these groups. Mapping the geographic distribution of these genera identifies coastal biogeographic provinces where fauna with high intrinsic risk are strongly affected by human activity or climate change. Such regions are disproportionately in the tropics, raising the possibility that these ecosystems may be particularly vulnerable to future extinctions. Intrinsic risk provides a prehuman baseline for considering current threats to marine biodiversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Finnegan, Seth -- Anderson, Sean C -- Harnik, Paul G -- Simpson, Carl -- Tittensor, Derek P -- Byrnes, Jarrett E -- Finkel, Zoe V -- Lindberg, David R -- Liow, Lee Hsiang -- Lockwood, Rowan -- Lotze, Heike K -- McClain, Craig R -- McGuire, Jenny L -- O'Dea, Aaron -- Pandolfi, John M -- New York, N.Y. -- Science. 2015 May 1;348(6234):567-70. doi: 10.1126/science.aaa6635.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrative Biology, University of California, Berkeley, CA 94720, USA. sethf@berkeley.edu. ; Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada. ; Department of Earth and Environment, Franklin and Marshall College, Lancaster, PA 17604, USA. ; Department of Paleobiology, National Museum of Natural History, Washington, DC 20013, USA. ; United Nations Environment Programme World Conservation Monitoring Centre, Cambridge CB3 0DL, UK. Computational Science Laboratory, Microsoft Research, Cambridge CB1 2FB, UK. Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada. ; Department of Biology, University of Massachusetts, Boston, MA 02125, USA. ; Environmental Science Program, Mount Allison University, Sackville, New Brunswick E4L 1A5, Canada. ; Department of Integrative Biology, University of California, Berkeley, CA 94720, USA. ; Center for Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Blindern, N-0316 Oslo, Norway. ; Department of Geology, College of William and Mary, Williamsburg, VA 23187, USA. ; Department of Biology, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada. ; National Evolutionary Synthesis Center, Durham, NC 27705, USA. ; School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA. ; Smithsonian Tropical Research Institute, 0843-03092, Balboa, Republic of Panama. ; Australian Research Council Centre of Excellence for Coral Reef Studies, School of Biological Sciences, University of Queensland, St. Lucia, QLD 4072, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25931558" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Aquatic Organisms ; *Biodiversity ; *Climate Change ; *Extinction, Biological ; Fossils ; *Human Activities ; Humans ; *Oceans and Seas ; Paleontology ; Risk
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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