Comprehensive study on aquatic organisms and functions of water bodys of 4 lake areas with different trophic states in Donghu Lake, Wuhan

Abstract

于1991-1993年研究了武汉东湖4个营养型不同的子湖中水生生物与水域功能,表明各子湖之间各类水生生物的生态特征存在明显差异。茶港湾的HBC和FC的数量、藻类的细胞密度和初级生产量、浮游动物和底栖动物的个体密度等均居4个子湖之首,其水质已达到超富营养水平,将该湖区作为污水天然净化区进行管理,可望对东湖的主体湖区起到缓冲和保护作用;郭郑湖的水质状况仅次于茶港湾湖区,处于富营养阶段,该湖区多项生化指标已不符合饮用水源和养殖水体的要求,以发展水上运动和旅游事业为主要功能较为适宜;后湖的营养水平介于中-富营养和富营养之间,作为饮用水源和水草植被的恢复与保护区,需降低石油类化学指标、严格限制湖周N、P营养和外源污染物排入;牛巢湖是目前东湖最洁净的水体,属中营养型,是理想的饮用水源和风景游览区。;A comprehensive study on hydrobicxs and functions of water bodys of four lake areas with different trophic states in Donghu Lake (Wuhan) was carried out during Jan. 1991-Aug. 1993. The four lake areas differ greatly in the characteristics of aquatic organisms. The maximum values of HBC, FC, algal cell density and primary production, individual density of zooplankton and zoobenthos were found at Chagangwan area, and the minirmim values were observed at Niuchaohu area. According to all of the bio-parameters, trophic levels and states of water uses of the studied 4 lake areas, their functions are as follows. Chagangwan area is suitable for receiving and purifying waste-water; Guozhenghu area is suitable for flood control, recreations and tourist trade; Houhu area and Niuchaohu area are suitable for waterworks and tourist trade respectively.