中文摘要：

2006年7月至2007年6月对太湖贡湖湾大型浮游动物群落结构的季节变化进行了研究，共鉴定出大型浮游动物35种，年均密度为467个／L，年均生物量为1．726mg／L。贡湖湾大型浮游动物优势种为针簇多肢轮虫（Po@arthratrigla）和萼花臂尾轮虫（Brachionuscalyciflorus）；其中，针簇多肢轮虫年均密度为99个／L，占大型浮游动物总数量的22％，萼花臂尾轮虫年均密度为49个／L，占大型浮游动物总数量的11％。相关分析表明，轮虫数量与颗粒悬浮物浓度（r=-0．603，P〈0．05）和桡足类生物量（r=-0．670，P〈0．05）呈显著负相关；枝角类数量与轮虫生物量（r=-0．606，P〈0．05）显著负相关；桡足类数量与水温（r：0．596，P〈0．05）和总磷（r=0．596，P〈0．05）呈显著正相关性，与枝角类生物量（r=0．776，P〈0．01）极显著正相关。

英文摘要：

A study on seasonal variations of macrozooplankton community in Gonghu Bay in Lake Taihu, was con- ducted from Jul. 2006 to Jun. 2007. Thirty-five maerozooplankton species were identified in Gonghu Bay respec- tively. The annual average density and biomass of macrozooplankton were 467 ind/L and 1. 726 mg/L in Gonghu Bay respectively. In Gonghu Bay, Polyarthra trigla was dominant species, with annual average density 99 ind/L, constituting 22% of the total macrozoopankton; Brachionus calyciflorus was also dominant species, with annual av- erage density 49 ind/L, representing 11% of the total macrozooplankton. The correlatioh analysis indicated that there were signifieant negative correlations between the abundance of rotifer and concentration of suspended solids （ r = -0. 603,P 〈 0.05 ） and between the abundance of rotifer and the biomass of copepod （ r = -0. 670, P 〈 0.05 ） ; the abundance of cladoceran was notably negatively related to the biomass of rotifer（ r =-0. 606 ,P 〈0.05 ） ; the a- bundance of copepod was significantly positively related to water temperature （ r = 0. 596, P 〈 0.05 ）, total phos- phorous （ r = 0. 596,P 〈 0.05 ） and the biomass of cladocearan （ r = 0. 776, P 〈 0.01 ）.