庐山西海夏秋季浮游动物群落结构与水质评价

为了解庐山西海浮游动物群落结构和水体现状,于2012年8月(夏季)和10月(秋季)对庐山西海进行了调查。结果表明,夏季浮游动物共计4类32种,平均密度为113.48个/L,平均生物量为5.52 mg/L,优势种共有9种;秋季浮游动物共4类24种,平均密度为61.45个/L,平均生物量为4.29 mg/L,优势种减少为4种。依据多样性指数、均匀度指数和丰富度指数对庐山西海浮游动物进行评价,综合判断庐山西海处于中度污染状态。与近似纬度的千岛湖、洞庭湖和鄱阳湖的历史数据相比较,庐山西海浮游动物种类数和密度少于千岛湖和鄱阳湖,而多于洞庭湖;浮游动物生物量高于千岛湖和洞庭湖。

Zooplankton Community Structure and Water Quality Assessment of Lushanxihai in Summer and Autumn

In order to understand the zooplankton community structure and status of water body in Lushanxihai, surveys were conducted in August and October 2012. The results showed that a total of 32 species of zooplankton from 4 categories were recorded in summer, mainly dominated by 9 species, with the average density of 113.48 ind. /L and the average biomass of 5.52 mg/L. In autumn, 24 species of zooplanktons from 4 categories were identified with the average density of 61.45 ind. /L and the average biomass of 4.29 mg/L, however, the dominant species has reduced to 4 species. The water body of Lushanxihai was at the level of moderate pollution according to the evaluation results of the diversity index, evenness index and richness index of zooplankton. Compared with the lakes in the approximate latitude, like Qiandao Lake, Dongting Lake and Poyang Lake, the species of zooplankton in Lushanxihai was less than that of Qiandao Lake and Poyang Lake, but more than Dongting Lake, and the density was also lower than that of Qiandao Lake and Poyang Lake, but higher than Dongting Lake, and the biomass of zooplankton was larger than that of Qiandao Lake and Dongting Lake.