秋季丰水期山区河道时段性连通堰坝对底栖动物群落结构的影响  

The Impact of Connected Dams on the Community Structure of Benthic Animals in Mountainous River Channels During the Autumn Flood Season

作　　者：陈怡 王斌 徐泽琪 周湘哲 滑磊 胡静雯[1] 胡可可 CHEN Yi;WANG Bin;XU Ze-qi;ZHOU Xiang-zhe;HUA Lei;HU Jing-wen;HU Ke-ke(Zhejiang Institute of Hydraulics&Estuary,Hangzhou 310020;College of Environment,Hohai University,Nanjing 210098,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]浙江省水利河口研究院(浙江省海洋规划设计研究院),浙江杭州310020 [2]河海大学环境学院,江苏南京210098 [3]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2024年第9期43-47,共5页Water Resources and Power

基　　金：浙江省水利厅科技项目(RA2205,RA2010)。

摘　　要：为探究时段性连通堰坝建设对山区河流水生态影响机制,结合原位监测和室内鉴定方法,以大型无脊椎底栖动物为水生态指示生物,于2022年9~10月丰水期对丽水市6条阻隔系数不一的山区性河道进行监测,分析了河流阻隔系数对底栖动物群落的影响。结果表明,就整体河道而言,时段性连通堰坝建设对底栖动物群落的物种多样性影响较小,但与软体动物的生物密度有较强关联——堰坝阻隔系数与软体动物密度呈显著负相关;就单条河道沿程变化而言,随着阻隔系数的增大,河流底栖生物密度由阶梯减少趋势向均匀化趋势发展。当前堰坝建设对河流底栖生物影响评价缺乏更精确有效的量化指标,改进的阻隔系数可暂时性用作堰坝建设对生态影响的指示性评价。In order to explore the impact mechanism of dams with temporal connectivity on water ecology of mountainous streams,six mountainous streams with different barrier coefficients in Lishui City were monitored and the impact of river barrier coefficient on benthic animal communities is analyzed in September and October 2022,during which time the methods of combination of field sampling,field measurement and indoor identification were adopted,and macroinvertebrate benthos were used as indicator organisms of water ecology.The results show that in terms of the overall river course,the construction of dams with temporal connectivity has little impact on the species diversity of the benthic fauna community,but has a strong correlation with the density of molluscs,and the barrier coefficient of dams with temporal connectivity is negatively correlated with mollusc density;As for the variation of a single channel along the river,with the increase of barrier coefficient,the benthic density of the river develops from the trend of step reduction to the trend of uniformity.At present,there is a lack of effective evaluation indexes for the impact of dam construction on river benthic organisms.The barrier coefficient can be used as an indicator to evaluate the impact of dam construction on benthic organisms of river temporarily.

关 键 词：河流连通性 底栖动物 堰坝 阻隔系数 影响 

分 类 号：X143[环境科学与工程—环境科学]