巢湖春夏季节浮游植物的动态变化

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Abstract

We studied the variations of phytoplankton in Chaohu Lake in spring and summer seasons using enclosure experiments and field investigation from March to August,2009.The results showed that phytoplankton density and biomass in the enclosures were (2.95-102.43)×l0⁵cells·L^-1 and 0.06-7.39 mg·L^-1,respectively.The dominant species were Anabaena sp.,Cyclotella meneghiniana, and Dinobryon cylindricum,with their maximal biomass of 0.82 mg·L^-1,0.66 mg·L^-1,and 2.98 mg·L^-1,respectively,occurring in March or April.In spring(from March to May),the averaged phytoplankton biomass in Chaohu Lake was 5.43 mg·L^-1.Chlorophytes contributed the most to the total algal biomass(47.59%),followed by Bacillariophytes(40.81%),and then Cyanobacteria(10.18%).The dominant species were Pediastrum sp.and C.meneghiniana.In summer(from June to July),the phytoplankton biomass in Chaohu Lake was averaged 7.89 mg·L^-1.Cyanobacteria contributed 58.67% to total algal biomass,followed by Chlorophytes(26.77%) and Bacillariophytes(11.64%).The dominant species was Microcystis sp..Phosphorus and cladoceran grazing play important roles in the variations of phytoplankton biomass and community structure in Chaohu Lake in spring and summer seasons.

Key words： Chaohu Lake phytoplankton enclosure seasonal variation

Received: 25 April 2011

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	Articles by authors
	MENG Xiao-li
	DENG Dao-gui
	ZHANG Sai
	YANG Wei
	CHEN Li-na

Cite this article:

MENG Xiao-li,DENG Dao-gui,ZHANG Sai, et al. Variations of phytoplankton in Chaohu Lake in spring and summer seasons[J]. , 2011, 30(2): 189-194.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2011/V30/I2/189

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