Journal
CONSERVATION LETTERS
Volume 10, Issue 6, Pages 708-716Publisher
WILEY
DOI: 10.1111/conl.12336
Keywords
Conservation biogeography; freshwater fishes; geographic range; indicators; macroecology; species' vulnerability; tropics
Categories
Funding
- Agence Nationale de la Recherche [ANR-09-PEXT-008]
- Institut de Recherche pour le Developpement (IRD)
- Nature Conservancy
- Initiatives Rios Vivos Andinos
- Peces de Agua dulce de Colombia
- IRD
- Consejo Nacional de Ciencia y Tecnologia (CONACYT)
- Instituto de Ecologia A.C. (INECOL)
- BioFresh European project [226874]
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Tropical rivers are experiencing an unprecedented boom in dam construction. Despite rapid dam expansion, knowledge about the ecology of tropical rivers and the implications of existing and planned dams on freshwater-dependent species remains limited. Here, we evaluate fragmentation of fish species' ranges, considering current and planned dams of the Magdalena River basin, Colombia. We quantify the relationship between species' range and body sizes and use a vulnerability limit set by this relationship to explore the influence that fragmentation of species' ranges has on extinction risk. We find that both existing and planned dams fragment most fish species' ranges, splitting them into more vulnerable populations. Importantly, we find that migratory species, and those that support fisheries, are most affected by fragmentation. Our results highlight the dramatic impact that dams can have on freshwater fishes and offer insights into species' extinction risk for data-limited regions.
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