千岛湖浮游动物的群落结构

研究了贫－中营养型的大型，深水湖泊－－浙江千岛湖浮游动物的群落结构，包括种类组成，种群动态，现存量及群落多样性指数。在1a的研究中，共发现139种浮游动物（27种原生动物，70种轮虫，26种枝角类和16种桡足类）。根据年平均密度，各类浮游动物的优势种分别为褶累枝(Epistylis plicatilie)，螺形龟甲轮虫9Keratella cochlearis)，透明蚤（Daphnia hyalina)和一种中剑水蚤（Mesocyclops notius)。轮虫和枝角类群落多样性指数随着水体透明度的增大呈下降的趋势；采样站变异下，枝角类群落多样性指数与其种类数和密度呈显著的正相关关系；月份变异下，桡足类群落多样性指数与其密度呈显著的正相关关系。

Community Structure of Zooplankton in Lake Qiandaohu

Lake Qiandaohu, Zhejiang is a large and deep lake in the middle and lower reaches of the Changjiang River, China. We made a survey on the species composition, density, biomass and diversity index of zooplankton in Lake Qiandaohu. Zooplankton samples were taken at monthly interval from ten stations from January-December 1999. At each station, two kinds of samples were taken, one for identifying species and the other for determining abundance of zooplankton. The frist kind of sample was the mixture of five su...