2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 2:30 PM - 2:45 PM | THE LOSS OF FRESHWATER MEGAFAUNA | 410 B
THE LOSS OF FRESHWATER MEGAFAUNA
Megafauna species have fascinated scientists and the general public for a long time due to their spectacular appearances and the vital ecological roles they play. Compared to megafauna in terrestrial or marine ecosystems, freshwater megafauna have been largely overlooked in previous research and conservation actions. At the same time, they are subject to various human threats. Consequently, more than half of all assessed freshwater megafauna species are considered as threatened by the IUCN Red List of Threatened Species. To date, comprehensive analysis of changes in population size and distribution range of freshwater megafauna is still lacking. We collected time-series data of freshwater megafauna species and tracked their population changes from 1970 to 2012 at global scale. Population changes were compared among taxonomic groups and regions, and have been further linked to life history traits, human threats and conservation actions within different regions. In addition, range contractions of freshwater megafauna in Europe and North America have been quantified. For example, Acipenser gueldenstaedtii has lost 50% of its distribution range. We discuss the ecological consequence of megafauna loss in freshwater ecosystems and the potential of freshwater megafauna in promoting freshwater biodiversity conservation.
- Biodiversity
- Population
- Vertebrate
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Presenters/Authors
Fengzhi He
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany & Institute of Biology, Freie Universität Berlin, Berlin, Germany & School of Geography, Queen Mary University of London, London, United Kingdom, fengzhi.he@igb-berlin.de;
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Vanessa Bremerich
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany, bremerich@igb-berlin.de;
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Jonathan N. W. David
(), School of Geography and the Environment, University of Oxford, Oxford, United Kingdom, jon.david86@gmail.com;
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Christiane Zarfl
(), Center for Applied Geosciences, Eberhard Karls Universität Tübingen, Tübingen, Germany, christiane.zarfl@uni-tuebingen.de;
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Zeb Hogan
(), University of Nevada Reno, Global Water Center, zhogan@unr.edu;
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Klement Tockner
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany & Institute of Biology, Freie Universität Berlin, Berlin, Germany & Austrian Science Fund (FWF), Vienna, Austria, klement.tockner@fwf.ac.at;
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Sonja C. Jähnig
(), Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany , sonja.jaehnig@igb-berlin.de;
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