中文摘要：

2012年11月至2014年10月,对太平湖浮游动物群落进行了为期两年的调查研究.共鉴定出浮游动物45属89种,其中轮虫29属69种、枝角类5属7种、桡足类2属4种和原生动物9属9种;优势种主要来自于轮虫异尾轮虫属（Trichocereca）和龟甲轮虫属（Keratella）.浮游动物的丰度值存在明显的季节变化,表现为夏季最大,平均达1326ind./L,秋季春季次之,分别为608和605ind./L,冬季最小为216ind./L;垂直分布表现为春夏季太平湖表层浮游动物丰度最高,中间层次之,底层最小,秋冬季则表现为中间层最高.浮游动物群落Shannon-Wiener多样性指数和Margalef丰富度指数中间层普遍高于表层和底层,Pielou均匀度指数表现为底层要高于表层和中间层,季节变化表现为夏秋季显著高于冬春季的现象,水质评价表明夏秋季水质好于春冬季.聚类和多维尺度分析表明：太平湖浮游动物可分为夏秋季类群与春冬季类群,两类群均表现为湖心与上下游区域群落结构差异较大,其中春冬季类群差异较明显;相关和逐步回归分析表明：透明度和水温为太平湖浮游动物群落结构变化的主要环境影响因子;依据结构方程模型（SEM）和冗余分析（RDA）的结果显示,在溶解氧和水温较高的水环境中浮游动物丰度值表现为较大,其中水温对轮虫的影响高于对枝角类和桡足类的影响.

英文摘要：

The community characteristics and distribution of zooplankton in Taiping Lake were investigated fromNovember 2012 to October 2014. The study identified a total of 89 species of the zooplankton belonged to 45 genera,including 69 Rotifera belonged to 29 genera, 7 Cladocera belonged to 5 genera, 4 Copepoda belonged to 2 genera and 9Protozoa belonged to 9 genera. The dominant species were the Rotifera （Trichocereca） and （Keratella）. We found thevariability of spatial and temporal distribution of zooplankton abundance in Taiping Lake with the maximum of 1326 ind./L in summer and the minimum of 216 ind./L in winter while in spring and autumn they were 608 ind./L and 605 ind./L respectively. The vertical distribution of zooplankton abundance in water body showed that the surface abundance had the highest concentration, followed by the middle layer and the bottom layer in spring and summer, while themiddle layer had the highest abundance in autumn and winter. Both Shannon-Wiener diversity index and Margalefabundance index suggested that the middle layer was generally higher than the surface and bottom, while Pielou indexindicated that the bottom layer had the highest one in all three layers. All the diversity indexes suggested significantlyhigher value in summer and fall than that in spring and winter, and the water quality in summer and fall was better thanthat in spring and winter. The cluster analysis and multi-variate analysis revealed that zooplankton can divide intospring-winter group and summer-fall group, and there were comparatively big differences in zooplankton communitystructure from the central area to upstream and downstream of Taiping Lake with more obvious differences in thespring-winter group. The correlation and stepwise regression analysis displayed a significant relationship between zoo-plankton community and environmental factors. These results indicated that the transparency and the water temperature were the main environmental impact factors in regulating zooplankton community structure in