长湖水环境质量与水生生物状况

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In this paper,the status quo of aquatic environmental quality and aquatic organisms in the Changhu Lake were evaluated . The results showed that the pollution of water quality in the lake was due to organic pollution. The water quality ranked among ClassⅤ or inferior Ⅴ during the period of overall appraisal .The Changhu lake was an extremely eutrophic one. The structure of algal community changed with the seasons. In the Lake,cyanobacteria were the dominant species in summer. Phosphorus was the limiting factor for algal growth,and the quantity of zooplanktons in summer and autumn was significantly higher than in winter and spring . Curly pondweed (Potamogeton crispus ) and P. maackianus were the two dominant species of submerged plants. As regards to distribution,aquatic vascular plants covered 80%~90% of the whole area of the lake . Their biomass was rather high in spring. The growth of the algae was in a relative balance with that of the submerged plants.

Key words: the Changhu Lake, aquatic environment, aquatic organisms

HE Li,CHEN Daqing,ZHANG Bin,LIU Shaoping,DUAN Xinbing,XIE Congxin. STATUS QUO OF AQUATIC ENVIRONMENTAL QUALITY AND AQUATIC ORGANISMS IN THE CHANGHU LAKE[J].RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2006, 15(Sup1): 105-109.

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STATUS QUO OF AQUATIC ENVIRONMENTAL QUALITY AND AQUATIC ORGANISMS IN THE CHANGHU LAKE

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