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城镇化对西苕溪大型底栖动物群落的影响
引用本文:俞建,于海燕,丁宁,韩鸣花.城镇化对西苕溪大型底栖动物群落的影响[J].环境监控与预警,2016,8(5):45-48.
作者姓名:俞建  于海燕  丁宁  韩鸣花
作者单位:1. 浙江省环境监测中心,浙江 杭州,310012;2. 南京农业大学,江苏 南京,210095
基金项目:国家自然科学基金资助项目(30840345)
摘    要:于2004—2010年5月对西苕溪流域20个参照点,5个中度干扰点以及2个重度干扰点的底栖动物进行了调查,共鉴定出74科190属226个种;受干扰后,底栖动物群落物种丰富度、EPT物种丰富度、Shannon-wiener多样性指数和B-IBI指数显著下降,BI指数显著升高。CCA分析结果表明,参照、中度和重点干扰样点的底栖动物群落差异明显。城镇化引起的溪流水温上升、营养盐升高、泥沙输入量增多和堤岸固化是导致溪流底栖动物群落退化的主要原因。

关 键 词:生物多样性  大型底栖无脊椎动物  城镇化  西苕溪流域
收稿时间:2016/8/12 0:00:00
修稿时间:2016/8/16 0:00:00

Influence of Urbanization on Benthic Macroinvertebrate in Xitiaoxi Watershed
YU Jian,YU Hai yan,DING Ning,HAN Ming hua.Influence of Urbanization on Benthic Macroinvertebrate in Xitiaoxi Watershed[J].Environmental Monitoring and Forewarning,2016,8(5):45-48.
Authors:YU Jian  YU Hai yan  DING Ning  HAN Ming hua
Abstract:Urbanization is of great impact on stream ecosystem health .We sampled 20 reference sites , 5 moderately disturbed sites and 2 heavily disturbed sites in May from 2004 and 2010 in Xitiaoxi watershed .We identified a total of 226 species which belonged to 190 genera and 74 families.We found significant decrease in taxa richness of benthic macroinvertebrate , EPT taxa richness , Shannon-Wiener diversity index and B-IBI index in disturbed sites , and a significant increase of BI index .Canonical Correspon-dence Analysis ( CCA) well separated the benthic macroinvertebrate communities of the reference , moderately and heavily disturbed sites.The urbanization related factors , such as water temperature increase , nutrients enrichment , high load of fine sediments and bank stabilization greatly contributed to the decline of benthic macroinvertebrae diversity .
Keywords:Biodiversity  Benthic macroinvertebrate  Urbanization  Xitiaoxi watershed
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