Maia-Barbosa P M, Barbosa L G, Brito S L, Garcia F, Barros C F A, Souza M B G, Mello N, Guimarães A S, Barbosa F A R
Laboratório de Ecologia do Zooplâncton, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais – UFMG, Av. Antônio Carlos, 6627, CP 486, CEP 30161-970, Belo Horizonte, MG, Brazil.
Braz J Biol. 2010 Oct;70(3 Suppl):795-802. doi: 10.1590/s1519-69842010000400010.
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.
为了验证多姆·埃尔韦西奥湖（巴西东南部）物理、化学和生物学特征的变化，本研究比较了过去三十多年来湖泊学调查获得的以往数据和近期数据。1978年、1983年以及1999年至2006年期间的浮游生物物种组成和密度，以及环境数据表明，这些变化是由季节性气候因素或人为原因驱动的。多样性的变化表现为雨季和旱季交替以及外来鱼类物种引入的结果。最后，通过规划行动和监测方案，对改善该地区的保护工作提出了建议。
