Plankton diversity and limnological characterization in two shallow tropical urban reservoirs of Pernambuco State, Brazil

Anais da Academia Brasileira de Ciências

Viviane L.s. Almeida²  Maria Da Graça G. Melão¹  Ariadne N. Moura¹ 

[1] ,Universidade Federal de São Carlos Centro de Ciências Biológicas e da Saúde São Carlos SP ,Brasil

关键词: northeastern Brazil;    phytoplankton;    trophic status;    zooplankton;    nordeste do Brasil;    fitoplâncton;    estado trófico;    zooplâncton;   

DOI  :  10.1590/S0001-37652012005000027

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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