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《Acta Ecologica Sinica》 2002-04
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PF Unit Protozoan Community Characteristics and the Relation with the Water Quality in the Guangzhou Reach of the Pearl River

XU Run-Lin 1, BAI Qing-Sheng 1,XIE Rui-Wen 2 (1.Life Science School, Zhongshan University, Guangzhou 510275, China;2.Guangzhou Institute of Environmental Sciences)  
Using the national standard of China, “Water quality——microbial community biomonitoring——PFU method”, the protozoan community structures and their colonization procedures were investigated and the characteristics of PFU protozoan communities in the Guangzhou Reach of Pearl River were analyzed. Total 203 species of protozoa, including 44 phytoflagelates, 64 zooflagelates, 17 sarcodina and 78 ciliates, have been found during the investigation. Compared with the references, the features of protozoan communities in the Guangzhou Reach of Pearl River are: more zooflagelates, less phtoflagelates, and more ciliates and less sarcodina. The species compositions of PFU protozoan communities on different spots are disparity. Considered in the species composition, the most species number of PFU protozoan communities was found the spot of Dunjitou. On the hand, the species number from the spot of Liede was less. On the most spots, the PFU protozoan communities reached their the most values in the species numbers after 1 day exposed in the water, and then the species number decreased their species number with the exposed time increase. Compared with the data of water qualities, it has showed that the colonization speed on the spots with high water quality is lower, and it will take long time to reach the dynamitic balance in colonization, but on the spots with lower water qualities, especially in eutrophication, the community colonization speed was faster and will take shorter time to reach it. The results showed that the PFU protozoan community have been damaged in the structures and function with the water quality worsen, when the river passes through Guangzhou City. After a long distance, with the decrease of pollutant concentrations in the water and the self-purification of the ecosystem, the protozoan community has been restorated in.
【Fund】: 国家自然科学基金重点资助项目 ( 39730 0 70 ) ;; 国家自然科学基金资助项目 ( 39770 1 4 4 ) ;; 淡水生态与生物技术 国家重点实验室开放基金资助项目 ;; 教育部高校骨干教师资助项目
【CateGory Index】: X835
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