Long-term dynamics of zooplankton in the Matita and Merhei shallow lakes (the Danube Delta, Romania). 1. Diversity and abundance
The present paper presents significant changes occurred in the multi-annual dynamics of zooplankton diversity and abundance (1980-2007), under the pressure of human-induced eutrophication in two shallow lakes specific for the Danube Delta. Zooplankton community from lakes Matita and Merhei was characterized by high species richness but low abundance values until 1981, in ecological conditions unaffected by eutrophication. For the next ten years,
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