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学科主题: Ecology; Marine & Freshwater Biology
题名: Changes in benthic algal communities following construction of a run-of-river dam
作者: Wu, Naicheng1; Tang, Tao1; Zhou, Shuchan1; Jia, Xinghuan1; Li, Daofeng1; Liu, Ruiqiu1; Cai, Qinghua1
通讯作者: Wu, NC, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
关键词: run-of-river ; dam construction ; benthic algal communities ; BACI
刊名: JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY
发表日期: 2009-03-01
DOI: 10.1899/08-047.1
卷: 28, 期:1, 页:69-79
收录类别: SCI
文章类型: Article
部门归属: [Wu, Naicheng; Tang, Tao; Zhou, Shuchan; Jia, Xinghuan; Li, Daofeng; Liu, Ruiqiu; Cai, Qinghua] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [30330140]; Key Project of Knowledge Innovation Program of the CAS [KSCX2-YW-427]; National Basic Research Priorities Program [2002CD412310]
类目[WOS]: Ecology ; Marine & Freshwater Biology
研究领域[WOS]: Environmental Sciences & Ecology ; Marine & Freshwater Biology
摘要: Ecological responses to dam construction are poorly understood, especially for downstream benthic algal communities. We examined the responses of benthic algal communities in downstream reaches of a tributary of the Xiangxi River, China, to the construction of a small run-of-river dam. From February 2003 to August 2006, benthic algae, chemical factors, and habitat characteristics were monitored upstream and downstream of the dam site. This period spanned 6 mo before dam construction and 37 mo after dam construction. Benthic algal sampling yielded 199 taxa in 59 genera that belonged to Bacillariophyta, Chlorophyta, and Cyanophyta. Some physical factors (flow velocity, water depth, and channel width) and 3 algal metrics (diatom species richness, Margalef diversity, and % erect individuals) were significantly affected by the dam construction, whereas chemical factors (e.g., NH4-N, total N, SiO2) were not. Nonmetric multidimensional scaling (NMS) ordinations showed that overall algal assemblage structure downstream of the dam sites was similar to that of upstream control sites before dam construction and for 1 year after dam construction (p > 0.05). However, sites belonging to upstream and downstream reaches were well separated on NMS axis 1 during the 2(nd) and 3(rd) years after dam construction. Our results suggest that impacts of dam construction on benthic algal communities took 2 to 3 y to emerge. Further development of a complete set of indicators is needed to address the impact of small-dam construction. Our observations underscore the need for additional studies that quantify ecological responses to dam construction over longer time spans.
英文摘要: Ecological responses to dam construction are poorly understood, especially for downstream benthic algal communities. We examined the responses of benthic algal communities in downstream reaches of a tributary of the Xiangxi River, China, to the construction of a small run-of-river dam. From February 2003 to August 2006, benthic algae, chemical factors, and habitat characteristics were monitored upstream and downstream of the dam site. This period spanned 6 mo before dam construction and 37 mo after dam construction. Benthic algal sampling yielded 199 taxa in 59 genera that belonged to Bacillariophyta, Chlorophyta, and Cyanophyta. Some physical factors (flow velocity, water depth, and channel width) and 3 algal metrics (diatom species richness, Margalef diversity, and % erect individuals) were significantly affected by the dam construction, whereas chemical factors (e.g., NH(4)-N, total N, SiO(2)) were not. Nonmetric multidimensional scaling (NMS) ordinations showed that overall algal assemblage structure downstream of the dam sites was similar to that of upstream control sites before dam construction and for 1 year after dam construction (p > 0.05). However, sites belonging to upstream and downstream reaches were well separated on NMS axis 1 during the 2(nd) and 3(rd) years after dam construction. Our results suggest that impacts of dam construction on benthic algal communities took 2 to 3 y to emerge. Further development of a complete set of indicators is needed to address the impact of small-dam construction. Our observations underscore the need for additional studies that quantify ecological responses to dam construction over longer time spans.
关键词[WOS]: XIANGXI RIVER ; SMALL HYDROPOWER ; REMOVAL ; STREAM ; PHYTOPLANKTON ; PENNSYLVANIA ; ASSEMBLAGES ; DOWNSTREAM ; RESERVOIR ; SEDIMENT
语种: 英语
WOS记录号: WOS:000263481300007
ISSN号: 0887-3593
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7856
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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

Recommended Citation:
Wu, Naicheng; Tang, Tao; Zhou, Shuchan; Jia, Xinghuan; Li, Daofeng; Liu, Ruiqiu; Cai, Qinghua.Changes in benthic algal communities following construction of a run-of-river dam,JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY,2009,28(1):69-79
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