| 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 |
| DOI： |
| 分类号:826 |
| 文献标识码:B |
| 基金项目:国家自然科学基金资助项目（30840345） |
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| Influence of Urbanization on Benthic Macroinvertebrate in Xitiaoxi Watershed |
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YU Jian， YU Haiyan， DING Ning， HAN Minghua1,2
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1. Zhejiang Environmental Monitoring Center， Hangzhou， Zhejiang 310012， China;2. Nanjing Agricultural University， Nanjing， Jiangsu 210095， China
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| 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 Correspondence 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. |
| Key words: Biodiversity Benthic macroinvertebrate Urbanization Xitiaoxi watershed |
