以浮游动物初步评价苏州镬底潭的水质污染

镬底潭是苏州市郊的中型湖泊。1987年笔者对镬底潭的浮游动物进行了调查,并就浮游动物评价镬底潭水质污染作初步探讨。经分析,浮游动物高峰期出现的优势种多为耐污性种类,其数量分布呈现上游低下游高的趋势,恰与沿岸工厂废水排放所引起的水质污染浓度成反比,可以推断上游众多工厂的污水排放抑制了浮游动物的生长发育。以浮游动物多样性指数评价该水域的污染程度为中污染;从指示生物组成来看,趋于多污染类型。因此镬底潭水质应属于中污性和多污性的过渡类型。

Preliminary Evaluation on Water Pollution Condition in Huoditan Lake by Means of Zooplankton Analysis

Located on the outskirts of Suzhou City, Huoditan Lake is a mediumsized lake and investigation on zooplankton there was made in 1987. Based on the investigation, a preliminary discussion was made on the water quality evaluation by means of zooplankton analysis. The article analysed the zooplankton species composition, the dominant species occuring during the peak stage, the (?)ty distribution, as well as the influence of the sewage discharged from mauy plants in the upper-reaches of the lake, and concluded that the pollution type of the lake, based on the diversity index and the composition of the indicating organisms, was an in-between one of the mesosaprobie type and the polysaprobic type.