Almeida Viviane L S, Melão Maria da Graça G, Moura Ariadne N
Centro de Ciências Biológicas e da Saúde, Programa de Pós-Graduação em Ecologia e Recursos Naturais, Universidade Federal de São Carlos, SP, Brasil.
An Acad Bras Cienc. 2012 Jun;84(2):537-50. doi: 10.1590/s0001-37652012005000027. Epub 2012 Apr 26.
Plankton diversity, physical and chemical variables and chlorophyll a were analyzed in two shallow urban reservoirs with different trophic degrees on Pernambuco State, northeastern Brazil. High eutrophication levels were observed in Apipucos reservoir, while Prata reservoir was considered oligotrophic. Values reported for physical and chemical variables and chlorophyll a differed among the studied ecosystems. Richness and plankton diversity were higher in Apipucos reservoir especially for phytoplankton. The presence of potential toxic Cyanophyceae in both reservoirs reflects a problem mainly to Prata reservoir, which is used for public water supply. Differences were observed for some variables among sites of study in Apipucos reservoir, while the differences among strata were negligible in both reservoirs, reflecting the water column mixing by wind action. Rainfall regulated the temporal dynamics for the analyzed variables, with significant seasonal differences, mainly for the major of limnological variables in Apipucos reservoir. Plankton diversity was higher in Apipucos reservoir, especially to phytoplankton, showing that eutrophication and pollution can favor plankton diversity in tropical urban shallow reservoirs.
对巴西东北部伯南布哥州两个不同营养程度的城市浅水水库中的浮游生物多样性、物理和化学变量以及叶绿素a进行了分析。阿皮普科斯水库呈现出高富营养化水平，而普拉塔水库被认为是贫营养的。在所研究的生态系统中，物理和化学变量以及叶绿素a的报告值有所不同。阿皮普科斯水库的丰富度和浮游生物多样性更高，尤其是浮游植物。两个水库中潜在有毒蓝藻的存在主要给用于公共供水的普拉塔水库带来了问题。在阿皮普科斯水库的研究地点之间观察到一些变量存在差异，而两个水库中层间差异可忽略不计，这反映了风作用导致的水柱混合。降雨调节了所分析变量的时间动态，存在显著的季节差异，主要体现在阿皮普科斯水库的大多数湖泊学变量上。阿皮普科斯水库的浮游生物多样性更高，尤其是浮游植物，这表明富营养化和污染可能有利于热带城市浅水水库中的浮游生物多样性。
