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Phytoplankton Monitoring and Biological Diversity Analysis of Large and Medium Reservoirs Located in the Fenhe River Basin in Shanxi Province

SHI Wei-sheng;  
Based on the results of phytoplankton monitoring in four large and medium reservoirs including the Fenhe Reservoir,the Fenhe Reservoir Ⅱ,the Wenyuhe Reservoir and the Huihe Reservoir located in the Fenhe River Basin monitored in 2011 by Water Environment Monitoring Center in Shanxi Province,Margalef diversity index( D) and Shannon-Weaver diversity index( H') simplified by Lloyd were adopted to analyze and evaluate the biological diversity of phytoplankton.The results show that the biological diversity of phytoplankton in these four reservoirs is in the medium level,but the biological diversity in these reservoirs declines occasionally in individual months. The four reservoirs show further trend of eutrophication.
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