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《Journal of Shanghai Normal University(Natural Sciences)》 2011-04
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Phytoplankton community analysis and water quality eco-assessment on Dishui Lake

ZHU Wei-ju,WANG Quan-xi(College of Life and Environment Sciences,Shanghai Normal University,Shanghai 200234,China)  
Phytoplankton from Dishui Lake was respectively investigated in january and april and july and october,2009.Water physiochemical indexes of each sampling site were measured.96 species of phytoplankton belonging to 48 genera 8 divisions were indentified,of which the most abundant was Chlorophyta,with 51 species of 21 genera;followed successively by Bacillariophyta,with 20 species of 11 genera;Cyanophyta,with 16 species of 8 genera;Cryptophyta,with 3 species of 2 genera;Euglenophyta,with 2 species of 2 genera;Chrysophyta,with 2 species of 2 genera;Dinophyta,with 1 species of 1 genera;and Xanthophyta,with 1 species of 1 genera.The average biamass of phytoplankton in Dishui Lake was 2054.28×104 ind·L-1,mostly of Chlorophyta,taking up 41% of the total,followed successively by Bacillariophyta,taking up 30.5% of the total and Cyanophyta,taking up 16.5% of the total.The water quality was assessed by dominant species,biomass,Shannon-Weaver diversity index,Margalef index,Pielou evenness index,CODMn and transparency.The evaluation indicated that the water quality of Dishui Lake was medium-eutrophication.
【Fund】: 上海市教委项目(07II63)
【CateGory Index】: Q948.8;X824
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