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Zooplankton communities were investigated monthly(Nov.2007～Jan.2008)in the four rivers being restored primarily within Shanghai city zone,including Whuchaogang River,Hegang River,Chaoyang River and Caoyanghuanbang River.A total of 32 species were collected and identified,including 27species in Rotifera(85% of the total),3 species in Cladocera(9% of the total)and 2 species in Copepoda(6% of the total).Dominant species were Rotaria rotatoria,Rotaria neptunia,Brachionus calyciflorus,Keratella cochlearis,Polyarthra dolichoptera,and Filinia passa.The range of average zooplankton abundance in four rivers was 155.17～2114.17 ind./L,the maximum value(3 850 ind./L)occurred in Chaoyang River in Jan.2008;and the range of biomass was 0.50～5.76 mg/L,the maximum value(9.83 mg/L)occurred in Chaoyang River in Nov.2007.In winter,the average values of Shannon-Wiener index(H),Pielou eveness index(J)and Species richness index(D)of zooplankton in the four rivers revealed a very similar trend.The Shannon-Wiener index(H)showed Caoyanghuanbang River(1.87)> Hegang River(1.74)> Whuchaogang River(1.71)> Chaoyang River(1.70);The Pielou eveness index(J)showed Hegang River(0.93)> Caoyanghuanbang River(0.77)> Chaoyang River(0.70)> Whuchaogang River(0.69);The Species richness index(D)showed Caoyanghuanbang River(1.59)> Whuchaogang River(1.43)> Hegang River(1.31)> Chaoyang River(1.29).According to the Pearson correlation analysis results,there was a significant relationship between the community structure of zooplankton and the content of phosphate,nitrate,nitrite in the four rivers.The content of phosphate had a significant negative correlation with species(P<0.05),abundance and biomass(P<0.01)of zooplankton;Phosphate also had a positive correlation with Species richness index.Nitrate had a significant positive correlation with species(P<0.05);nitrite also significant correlated to the abundance(P<0.01)and Pielou eveness index(P<0.05)of zooplankton.
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Basic Information:
China Classification Code:Q958.8
Citation Information:
[1]LIU Yi,YU Na,XIONG Ze-quan,MAO Kai-yun,LI Er-chao,CHEN Li-qiao(School of Life Science,East China Normal University,Shanghai 200062,China).Preliminary Study on Zooplankton Community Structure of Shanghai Urban Rivers Restored in Winter[J].Journal of Hydroecology,2009,30(03):1-7.
Fund Information:
上海市水务局科研项目(沪水科2007-09); 国家自然科学基金(NO.30700064); 上海高校选拨培养优秀青年教师科研专项基金(NO.79001351)
2009-05-15
2009-05-15