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WATER QUALITY IN BEIJING TONGHUI RIVER,USING PFU PROTOZOAN COMMUNITIES AS INDICATORS

 XU Muqi (Institute of Zoology,Chinese Academy of Sciences Beijing 100080) ZHAI Jiaji SHAO Yongyi (Beijing Gaobeidian Wastewater Treatmet Plant Beijing 100022)  
This paper deals with the relationship between community diversity of protozoa and water quality in Tonghui River.The PFU protozoan colonization rates during a day reflects water quality's changes in five sampling sites——four in Tonghui River,one in Wenyu River as a control site.Protozoan community parameters(species composition,individual abundance,biomass and diversity index)in five sites is strongly related to pollution situation.Present research on PFU protozoan monitoring shows that water quality in Tonghui River has greatly been improved in comparison with 1980's data for PFU protozoan community's assessment conducted by author.
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