Abstract
The phytoplankton community were investigated at Xingkai Lake in July and August 2011. The results showed that there were 31 species belonging to 5 phylum of phytoplankton in Xingkai Lake. In the detect, 10 species (32.29%) of Cholorophyta was found. Cell density in Dangbi town and Lake center was 1.592×106ind./L and 1.562×106ind./L respectively. Cell density of Cyanophyta was the highest, and the dominant species were Merismopedia tenuissim, Anabaena sphaerica and Phormidium anomala . Shannon-Wiener index of samples in the two places were 2.85 and 2.86 respectively, and Margalef index were 1.59 and 1.27 respectively. It showed that the type of water was mesosaprobic-heavy pollution type, and we should pay attention to the water pollution.
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