Multiple drivers of decline in the global status of freshwater crayfish (Decapoda: Astacidea)

Richman, Nadia I., Böhm, Monika, Adams, Susan B., Alvarez, Fernando, Bergey, Elizabeth A., Bunn, John J.S., Burnham, Quinton, Cordeiro, Jay, Coughran, Jason, Crandall, Keith A., Dawkins, Kathryn L., DiStefano, Robert J., Doran, Niall E., Edsman, Lennart, Eversole, Arnold G., Füreder, Leopold, Furse, James M., Gherardi, Francesca, Hamr, Premek, Holdich, David M., Horwitz, Pierre, Johnston, Kerrylyn, Jones, Clive M., Jones, Julia P.G., Jones, Robert L., Jones, Thomas G., Kawai, Tadashi, Lawler, Susan, López-Mejía, Marilu, Miller, Rebecca M., Pedraza-Lara, Carlos, Reynolds, Julian D., Richardson, Alastair M.M., Schultz, Mark B., Schuster, Guenter A., Sibley, Peter J., Souty-Grosset, Catherine, Taylor, Christopher A., Thoma, Roger F., Walls, Jerry, Walsh, Todd S., and Collen, Ben (2015) Multiple drivers of decline in the global status of freshwater crayfish (Decapoda: Astacidea). Philosophical Transactions of the Royal Society of London Series B-Biological SciencesPhilosophical Transactions of the Royal Society of London Series, 370. 20140060. pp. 1-11.

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Abstract

Rates of biodiversity loss are higher in freshwater ecosystems than in most terrestrial or marine ecosystems, making freshwater conservation a priority. However, prioritization methods are impeded by insufficient knowledge on the distribution and conservation status of freshwater taxa, particularly invertebrates. We evaluated the extinction risk of the world's 590 freshwater crayfish species using the IUCN Categories and Criteria and found 32% of all species are threatened with extinction. The level of extinction risk differed between families, with proportionally more threatened species in the Parastacidae and Astacidae than in the Cambaridae. Four described species were Extinct and 21% were assessed as Data Deficient. There was geographical variation in the dominant threats affecting the main centres of crayfish diversity. The majority of threatened US and Mexican species face threats associated with urban development, pollution, damming and water management. Conversely, the majority of Australian threatened species are affected by climate change, harvesting, agriculture and invasive species. Only a small proportion of crayfish are found within the boundaries of protected areas, suggesting that alternative means of long-term protection will be required. Our study highlights many of the significant challenges yet to come for freshwater biodiversity unless conservation planning shifts from a reactive to proactive approach.

Item ID: 37662
Item Type: Article (Research - C1)
ISSN: 0962-8436
Keywords: extinction risk, crayfish, IUCN Red List, threatened, freshwater biodiversity
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© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

Funders: Esmée Fairbairn Foundation, Rufford Foundation, Biodiversity Synthesis Center
Date Deposited: 25 Jun 2015 03:00
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 80%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070402 Aquatic Ecosystem Studies and Stock Assessment @ 20%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960805 Flora, Fauna and Biodiversity at Regional or Larger Scales @ 100%
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