Floodplain lake fish assemblages in the Amazon River: directions in conservation biology

The Neotropical region is renowned for its high biodiversity, and the Amazon River basin contains the highest number of fish species of any river system in the world. In recent years, habitat fragmentation and exploitation of biotic resources have threatened biological integrity and provoked to need...

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Bibliographic Details
Published in:Biodiversity and conservation 2007-03, Vol.16 (3), p.679-692
Main Authors: Granado-Lorencio, C, Cerviá, J. Lobón, Lima, C. R. M. Araujo
Format: Article
Language:English
Subjects:
Assemblages
Biodiversity
Conservation biology
Fish
Floodplain lakes
Floodplains
Freshwater
Habitat fragmentation
Lakes
natural resource management
Nestedness
Pisces
River basins
Rivers
Sustainability management
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Summary:The Neotropical region is renowned for its high biodiversity, and the Amazon River basin contains the highest number of fish species of any river system in the world. In recent years, habitat fragmentation and exploitation of biotic resources have threatened biological integrity and provoked to need for sustainable management and conservation of the Amazon River system. We studied 36 floodplain lakes along 2000 km of the Amazon River. The fish assemblages associated with flood forests are moderately diverse, with low species dominance and reduced populations. To detect nestedness of fish assemblage composition in floodplain lakes, a nested subset analysis was performed on species presence-absence. The incidence matrix (species x lakes) was maximally packed using the Nestedness Temperature Calculator software. The results of ranking lakes and species allow us to establish targets for conservation. Such strategy for sustainable management should be focused on maintaining the Amazonian biodiversity.
ISSN:0960-3115
1572-9710
DOI:10.1007/s10531-005-3742-4