Population variation of phytoplankton in West Lake of Hangzhou before and after diluting sewages with erupting into river water and effect of controlling eutrophication

Abstract

Abstract: In 1988.4-1989.4, monthly investigations on individuals of blue algae in various areas of West Lake showed that after diluting sewages with empting into Qiantang River water, their amounts decreased from 84.4% in 1982 to 69.7%,and the species diversity increased from 118 to 192. The struetura' characteristics of population with blue algae being the dominant and the high TSIindex indicated that the water body of West Lake is still of eutrophic and its eutrophication is being slowly developed, and empting into river water doesn't induce any essential variation of water quality. Based on the variance analysis of algae amount and diversity index, the rates of pollution and eutrophication in various areas of this Lake is compared.

Key words: West Lake, Phytoplankton, Eutrophication

Lu Kaihong, Yao Liyi, Zhou Shaoqin, Li Meizi . Population variation of phytoplankton in West Lake of Hangzhou before and after diluting sewages with erupting into river water and effect of controlling eutrophication[J]. Chinese Journal of Applied Ecology, 1992, 3(3): 266-272.

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Population variation of phytoplankton in West Lake of Hangzhou before and after diluting sewages with erupting into river water and effect of controlling eutrophication

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