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Limnological changes in Dom Helvécio Lake (South-East Brazil): natural and anthropogenic causes

2010; Instituto Internacional de Ecologia (Brazil); Volume: 70; Issue: 3 suppl Linguagem: Inglês

10.1590/s1519-69842010000400010

ISSN

1678-4375

Autores

PM. Maia-Barbosa, L. G. Barbosa, SL. Brito, Francisco García, CFA Barros, M.B. Gonçalves Souza, Nina Garbellini de Mello, AS. Guimarães, Francisco Antônio Rodrigues Barbosa,

Tópico(s)

Aquatic Ecosystems and Biodiversity

Resumo

In order to verify changes in physical, chemical and biological features of Dom Helvécio Lake (South-East Brazil), this study compares previous and recent data obtained from limnological investigations over three decades. Plankton species composition and density together with environmental data from 1978, 1983, and during 1999 to 2006 showed changes driven by seasonal climatic forces or by anthropogenic causes. Changes in diversity are shown as a consequence of alternation of rainy and dry periods and introduction of exotic fish species. Finally, suggestions are made for improving conservation efforts in the area, through planned actions and monitoring programmes.

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