Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.

Megafauna species are intrinsically vulnerable to human impact. Freshwater megafauna (i.e., freshwater animals ≥30 kg, including fishes, mammals, reptiles, and amphibians) are subject to intensive and increasing threats. Thirty‐four species are listed as critically endangered on the International Un...

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Detalhes bibliográficos
Autores: He, F., Langhans, S.D., Zarfl, C., Wanke, R., Tockner, K., Jähnig, S.C.
Formato: artículo
Fecha de publicación:2020
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/51337
Acesso em linha:http://hdl.handle.net/10810/51337
Access Level:acceso abierto
Palavra-chave:IUCN Red List
biodiversity
body size
conservation
recovery potential
vertebrate
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spelling Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.He, F.Langhans, S.D.Zarfl, C.Wanke, R.Tockner, K.Jähnig, S.C.IUCN Red Listbiodiversitybody sizeconservationrecovery potentialvertebrateMegafauna species are intrinsically vulnerable to human impact. Freshwater megafauna (i.e., freshwater animals ≥30 kg, including fishes, mammals, reptiles, and amphibians) are subject to intensive and increasing threats. Thirty‐four species are listed as critically endangered on the International Union for Conservation of Nature (IUCN). Red List of Threatened Species, the assessments for which are an important basis for conservation actions but remain incomplete for 49 (24%) freshwater megafauna species. Consequently, the window of opportunity for protecting these species could be missed. Identifying the factors that predispose freshwater megafauna to extinction can help predict their extinction risk and facilitate more effective and proactive conservation actions. Thus, we collated 8 life‐history traits for 206 freshwater megafauna species. We used generalized linear mixed models to examine the relationships between extinction risk based on the IUCN Red List categories and the combined effect of multiple traits, as well as the effect of human impact on these relationships for 157 classified species. The most parsimonious model included human impact and traits related to species’ recovery potential including life span, age at maturity, and fecundity. Applying the most parsimonious model to 49 unclassified species predicted that 17 of them are threatened. Accounting for model predictions together with IUCN Red List assessments, 50% of all freshwater megafauna species are considered threatened. The Amazon and Yangtze basins emerged as global diversity hotspots of threatened freshwater megafauna, in addition to existing hotspots, including the Ganges‐Brahmaputra and Mekong basins and the Caspian Sea region. Assessment and monitoring of those species predicted to be threatened are needed, especially in the Amazon and Yangtze basins. Investigation of life‐history traits and trends in population and distribution, regulation of overexploitation, maintaining river connectivity, implementing protected areas focusing on freshwater ecosystems, and integrated basin management are required to protect threatened freshwater megafauna in diversity hotspots.This work was carried out within the SMART Joint Doctorate (Science for the MAnagement of Rivers and their Tidal systems), funded with the support of the Erasmus Mundus program of the European Union, and is a contribution to the Leibniz Competition project Freshwater Megafauna Futures. S.D.L was supported by the European UnionCONSERVATION BIOLOGYEuropean Union202120212020info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/51337reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/EC/H2020/748625https://dx.doi.org/10.1111/cobi.13590info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/3.0/es/© 2020 The Authors. Conservation Biology published by Wiley Periodicals LLC on behalf of Society for Conservation BiologyAtribución-NoComercial-CompartirIgual 3.0 Españaoai:addi.ehu.eus:10810/513372026-06-18T09:23:17Z
dc.title.none.fl_str_mv Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
title Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
spellingShingle Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
He, F.
IUCN Red List
biodiversity
body size
conservation
recovery potential
vertebrate
title_short Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
title_full Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
title_fullStr Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
title_full_unstemmed Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
title_sort Combined effects of life-history traits and human impact on extinction risk of freshwater megafauna.
dc.creator.none.fl_str_mv He, F.
Langhans, S.D.
Zarfl, C.
Wanke, R.
Tockner, K.
Jähnig, S.C.
author He, F.
author_facet He, F.
Langhans, S.D.
Zarfl, C.
Wanke, R.
Tockner, K.
Jähnig, S.C.
author_role author
author2 Langhans, S.D.
Zarfl, C.
Wanke, R.
Tockner, K.
Jähnig, S.C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv European Union
dc.subject.none.fl_str_mv IUCN Red List
biodiversity
body size
conservation
recovery potential
vertebrate
topic IUCN Red List
biodiversity
body size
conservation
recovery potential
vertebrate
description Megafauna species are intrinsically vulnerable to human impact. Freshwater megafauna (i.e., freshwater animals ≥30 kg, including fishes, mammals, reptiles, and amphibians) are subject to intensive and increasing threats. Thirty‐four species are listed as critically endangered on the International Union for Conservation of Nature (IUCN). Red List of Threatened Species, the assessments for which are an important basis for conservation actions but remain incomplete for 49 (24%) freshwater megafauna species. Consequently, the window of opportunity for protecting these species could be missed. Identifying the factors that predispose freshwater megafauna to extinction can help predict their extinction risk and facilitate more effective and proactive conservation actions. Thus, we collated 8 life‐history traits for 206 freshwater megafauna species. We used generalized linear mixed models to examine the relationships between extinction risk based on the IUCN Red List categories and the combined effect of multiple traits, as well as the effect of human impact on these relationships for 157 classified species. The most parsimonious model included human impact and traits related to species’ recovery potential including life span, age at maturity, and fecundity. Applying the most parsimonious model to 49 unclassified species predicted that 17 of them are threatened. Accounting for model predictions together with IUCN Red List assessments, 50% of all freshwater megafauna species are considered threatened. The Amazon and Yangtze basins emerged as global diversity hotspots of threatened freshwater megafauna, in addition to existing hotspots, including the Ganges‐Brahmaputra and Mekong basins and the Caspian Sea region. Assessment and monitoring of those species predicted to be threatened are needed, especially in the Amazon and Yangtze basins. Investigation of life‐history traits and trends in population and distribution, regulation of overexploitation, maintaining river connectivity, implementing protected areas focusing on freshwater ecosystems, and integrated basin management are required to protect threatened freshwater megafauna in diversity hotspots.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/51337
url http://hdl.handle.net/10810/51337
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/EC/H2020/748625
https://dx.doi.org/10.1111/cobi.13590
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/3.0/es/
Atribución-NoComercial-CompartirIgual 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/3.0/es/
Atribución-NoComercial-CompartirIgual 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv CONSERVATION BIOLOGY
publisher.none.fl_str_mv CONSERVATION BIOLOGY
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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