京杭运河江苏段底栖动物群落结构调查

通过2018年5月在京杭运河江苏段布设23个采样点调查底栖动物群落结构和生境状况,并用Shannon-Wiener多样性指数评价底栖动物多样性,用聚类法分析采样点底栖动物群落结构相似性,用ANOSIM分析检验聚类组差异性,用SIMPER对聚类组作主要特征物种分析。结果显示:23个采样点共采集底栖动物42种,其中甲壳纲4种、软体动物16种、多毛纲2种、蛭纲2种、昆虫纲4种(均为摇蚊类)、寡毛纲14种。聚类分析将23个采样点分成4组,ANOSIM分析检验表明各聚类组底栖动物群落结构具有显著差异(p<0.05),底质类型和水生植被等生境状况是影响京杭运河江苏段底栖动物群落结构的重要原因。

Survey on Macrobenthic Community Structure in Jiangsu Segment of Grand Canal

The macrobenthic community structure and habitat situation at 23 sampling sites in Jiangsu Segment of Grand Canal were surveyed in May of 2018.The macrobenthic diversity was evaluated by Shannon-Wiener diversity index.The similarity of macrobenthic community compositions in each sampling site were analyzed by cluster method,the differences of cluster groups were checked by ANOSIM,and the main species in cluster groups were identified by SIMPER.Results showed that there were 42 taxa of macrobenthic animals in 23 sampling sites,including 4 Crustacea,16 Mollusca,2 Polychatea,2 Hirudinea,4 Chironmidae,and 14 Oligochaeta.In addition,23 sampling sites were divided into 4 groups by clustering analysis,the macrobenthic community compositions were significant different between the 4 groups(p<0.05)according to ANOSIM analysis.Habitats and aquatic vegetation were the main factors influencing the macrobenthic community structure in Jiangsu Segment of Grand Canal.