武汉湖泊底栖动物群落结构及水质生态评价

A community structure of benthos and ecological assessment of water quality of shallow lakes in Wuhan

对武汉11个浅水湖泊底栖动物进行采样,共采到底栖动物22种,其中软体动物18种、水生昆虫1种、水生寡毛类2种,其他种类1种.优势种群是寡毛类的霍甫水丝蚓(Limnodrilus hoffmeisteri) 和水生昆虫类的摇蚊幼虫(Tendipes).底栖动物平均数量变幅在146.63～4045.56个/m2之间,生物量变幅在14.26～1303.8g/m2之间.采用理化分析、卡尔森TSI综合营养指数、Shannon-Weaver生物多样性指数等4种指数对湖泊进行了生态学评价,评价结果表明,汤逊湖、东湖、北湖、竹叶海是中富营养型湖泊,南湖、莲花湖、月湖、墨水湖、南太子湖、三角湖和龙阳湖是富营养型甚至重富营养型湖泊.

The investigations of benthos from 11 shallow lakes were carned out in Wunan, in total,22. species of the benthos were collected, of which, 18 species are mollusca, 2 species are aquatic oligochaeta, 1 genera aquatic insect. Dominant species in the benthos community are Limnodrilus hoffrneisteri of aquatic oligochaetea and Tendipes of aquatic insecta. The average density of the benthos ranges from 146.63-4045.56 ind/m^2, the average biomass of the benthos ranged from 14.26-1303.8g/m^2. By chemical analysis, Carlson Trophic Status Index, Shannon-Weaver biodiversity index and other 3 indexes, the lakes were evaluated ecologically. The result indicated that Tangxun Lake, East Lake, North Lake and Zhuye Lake are meso-eutrophication, the others are eutrophication, even hyper-eutrophication.