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题名: ASSESSING IMPACTS OF A DAM CONSTRUCTION ON BENTHIC MACROINVERTEBRATE COMMUNITIES IN A MOUNTAIN STREAM
作者: Wang, Xingzhong1, 2; Cai, Qinghua2; Jiang, Wanxiang1, 2; Qu, Xiaodong1, 2
通讯作者: Cai, QH (reprint author), Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.
关键词: flow regulation ; benthic macroinvertebrates ; partial least squares models ; Xiangxi River
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2013
卷: 22, 期:1, 页:103-110
收录类别: SCI
文章类型: Article
部门归属: [Wang, Xingzhong ; Jiang, Wanxiang ; Qu, Xiaodong] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China ; [Wang, Xingzhong ; Cai, Qinghua ; Jiang, Wanxiang ; Qu, Xiaodong] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [40911130508]; State Key Laboratory FEBL Research Grant [2011FBZ02]; Major S&T Special Project of Water Pollution Control and Management [2012ZX07104-002]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Dam would influence the flux of water and sediment, eventually disturbing ecological connectivity. In Asia, especially in China, there are many dams, but great scientific uncertainty still exists about their effects on downstream macroinvertebrates. Therefore, we investigated macroinvertebrate assemblages, in upstream and downstream reaches of a run-of-river dam on a tributary of the Xiangxi River, central China. Surber samples and associated physicochemical measurements were taken from five sites during the period from June 2003 to June 2007. According to the metrics selection principle of benthic biotic integrity index (B-IBI), we selected macroinvertebrate species richness and number of EPT taxa from 27 biological metrics to assess the effect of dam construction. We divided sites into three habitats (H1-H3) according to the impact extent of the dam. Using partial least squares (PLS), we developed two predictive models (macroinvertebrate species richness and number of EPT taxa) based on the environmental variables of the unregulated habitat (111). These models were then used to predict species richness and number of EPT taxa at impacted habitats (H2 and H3). To evaluate the impact of flow regulation residuals, i.e. the differences between observed and predicted values, were used to evaluate the impact of flow regulation. Significant impacts of flow regulation on macroinvertebrate species richness and number of EPT taxa were detected at impacted habitats (H2 and H3), where observed species richness were lower 8.7% and 28.1%, and EPT taxa also were lower 12.8% and 30.0%. Then, possible mechanisms for observed impacts were discussed. This study addressed the negative impacts of run-of-river dams on macroinvertebrates, which may lead to more sustainable management strategies.
英文摘要: Dam would influence the flux of water and sediment, eventually disturbing ecological connectivity. In Asia, especially in China, there are many dams, but great scientific uncertainty still exists about their effects on downstream macroinvertebrates. Therefore, we investigated macroinvertebrate assemblages, in upstream and downstream reaches of a run-of-river dam on a tributary of the Xiangxi River, central China. Surber samples and associated physicochemical measurements were taken from five sites during the period from June 2003 to June 2007. According to the metrics selection principle of benthic biotic integrity index (B-IBI), we selected macroinvertebrate species richness and number of EPT taxa from 27 biological metrics to assess the effect of dam construction. We divided sites into three habitats (H1-H3) according to the impact extent of the dam. Using partial least squares (PLS), we developed two predictive models (macroinvertebrate species richness and number of EPT taxa) based on the environmental variables of the unregulated habitat (111). These models were then used to predict species richness and number of EPT taxa at impacted habitats (H2 and H3). To evaluate the impact of flow regulation residuals, i.e. the differences between observed and predicted values, were used to evaluate the impact of flow regulation. Significant impacts of flow regulation on macroinvertebrate species richness and number of EPT taxa were detected at impacted habitats (H2 and H3), where observed species richness were lower 8.7% and 28.1%, and EPT taxa also were lower 12.8% and 30.0%. Then, possible mechanisms for observed impacts were discussed. This study addressed the negative impacts of run-of-river dams on macroinvertebrates, which may lead to more sustainable management strategies.
关键词[WOS]: BIOTIC INTEGRITY ; FISH ASSEMBLAGES ; DIATOM COMMUNITIES ; GORGES RESERVOIR ; RIVER SYSTEM ; INDEX ; FLOW ; DOWNSTREAM ; PATTERNS ; REMOVAL
语种: 英语
WOS记录号: WOS:000321723100013
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19566
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wang, Xingzhong; Cai, Qinghua; Jiang, Wanxiang; Qu, Xiaodong.ASSESSING IMPACTS OF A DAM CONSTRUCTION ON BENTHIC MACROINVERTEBRATE COMMUNITIES IN A MOUNTAIN STREAM,FRESENIUS ENVIRONMENTAL BULLETIN,2013,22(1):103-110
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