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(Polyarthra trigla)和萼花臂尾轮虫(Brachionus calyciflorus);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。
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 ）.
出处
《水生态学杂志》
北大核心
2012年第1期47-52,共6页
Journal of Hydroecology
基金
水体污染控制与治理重大科技专项(2009ZX07101013)
国家杰出青年基金项目(40825004)
湖泊与环境国家重点实验室开放基金项目(2008SKL012)联合资助
关键词
太湖
贡湖湾
大型浮游动物
群落结构
Lake Taihu
Gonghu Bay
macrozooplankton
community structure
