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

Brazilian Journal of Biology

Pm. Maia-barbosa²  Lg. Barbosa¹  Sl. Brito²  F. Garcia¹  Cfa Barros¹  Mbg Souza¹  N. Mello²  As. Guimarães²  Far Barbosa¹ 

[1] ,Universidade Federal de Minas Gerais Instituto de Ciências Biológicas Laboratório de Ecologia do ZooplânctonBelo Horizonte MG ,Brazil

关键词: tropical lake;    long term studies;    trophic changes;    phytoplankton;    zooplankton;    lago tropical;    estudos de longa duração;    alterações tróficas;    fitoplâncton;    zooplâncton;   

DOI  :  10.1590/S1519-69842010000400010

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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