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《Journal of Southwest China Normal University(Natural Science Edition)》 2008-06
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The Influence of Organic Pollution on Diversity of Diatom in Nanchong Section of Jialing River

CHEN Feng, WANG Ming-shu, DENG Hong-ping, LIU Chang-kunSchool of Life Science,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(MOE),Southwest University,Chongqing 400715,China  
To reveal the influence of organic pollution on diatom diversity in Nanchong section of the Jialing River,fifteen diatom samples were collected and diatom species numbers,cell density,diversity index and evenness index were studied.The results showed that: Organic pollution resulted in the decrease of diatom species numbers,increase of cell density and the decline of diversity and evenness index value.According to organic pollution degree and water quality conditions,fifteen sampling sites were classified into three types by clustering dendrogram of similarity of diatom community.B-7.5 was composed of LZ1,LZ3 and NB1with clear water-body;C-7.5 was composed of LZ2,NB3 and NC1 whose water quality belonged to α-mesosaprobic Zone;A-7.5 was mainly composed of LZ2,NB3,NC1,and so on whose water quality belonged to β-mesosaprobic Zone or Oligosaprobid Zone.The clustering result,which was coincidental with other indices and real water environmental conditions,preferably revealed the influence of organic pollution on diatom diversity.
【Fund】: 重庆市重点科技项目(240-413612);; 国家自然科技资源平台项目资助(2005DKA21403)
【CateGory Index】: X832
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