Abstract:We investigated macroinvertebrate communities at 93 sampling sites across Lake Taihu Basin in October 2012 to reveal the patterns of community structures and the possible determinants. A total of 104 macroinvertebrate taxa from 85 genera, 46 families, 19 orders, 8 classes, 4 phyla were recorded. Total abundance of macroinvertebrate varied greatly between 1.33 and 39080 ind./m2. More taxa were found in the western hills than the eastern plains, and the diversity indices in the western hills were significantly higher than the eastern plains. The benthic communities in the eastern plains were mainly dominated by pollution-tolerant taxa, such as Limnodrilus hoffmeisteri and Bellamya aeruginosa, while the dominant species in western hills included the sensitive taxa (aquatic insects from Ephemeroptera and Trichoptera). ANOSIM analysis showed that macroinvertebrate assemblages differed significantly between the two ecoregions, and B. aeruginosa was primarily responsible for the dissimilarity, followed by L. hoffmeisteri, Neocaridina denticulata, Parafossarulus eximius, and Branchiura sowerbyi. CCA showed that the most important factors regulating the assemblage structure were mainly habitat diversity, trophic state, and substrate heterogeneity. The results of Goodnight-Whitley and BPI indices indicated that rivers in the western hills were mostly at status of slight polluted, and rivers in the eastern plains were mostly at status of slight or intermediate polluted, with several severely polluted sites.
张又, 刘凌, 蔡永久, 尹洪斌, 高俊峰, 高永年. 太湖流域河流及溪流大型底栖动物群落结构及影响因素[J]. 中国环境科学, 2015, 35(5): 1535-1546.
ZHANG You, LIU Ling, CAI Yong-Jiu, YIN Hong-Bin, GAO Jun-Feng, GAO Yong-Nian. Benthic macroinvertebrate community structure in rivers and streams of Lake Taihu Basin and environmental determinants. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(5): 1535-1546.