Changes in benthic algal communities following construction of a run-of-river dam
文献类型：期刊论文
| 作者 | Wu, Naicheng; Tang, Tao; Zhou, Shuchan; Jia, Xinghuan; Li, Daofeng; Liu, Ruiqiu; Cai, Qinghua |
| 刊名 | JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY
 |
| 出版日期 | 2009-03-01 |
| 卷号 | 28期号:1页码:69-79 |
| 关键词 | run-of-river dam construction benthic algal communities BACI |
| ISSN号 | 0887-3593 |
| 通讯作者 | Wu, NC, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China |
| 中文摘要 | 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., 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. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Ecology; Marine & Freshwater Biology |
| 类目[WOS] | Ecology ; Marine & Freshwater Biology |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| 关键词[WOS] | XIANGXI RIVER ; SMALL HYDROPOWER ; REMOVAL ; STREAM ; PHYTOPLANKTON ; PENNSYLVANIA ; ASSEMBLAGES ; DOWNSTREAM ; RESERVOIR ; SEDIMENT |
| 收录类别 | SCI |
| 资助信息 | 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] |
| 语种 | 英语 |
| WOS记录号 | WOS:000263481300007 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/7856]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Naicheng,Tang, Tao,Zhou, Shuchan,et al. Changes in benthic algal communities following construction of a run-of-river dam[J]. JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY,2009,28(1):69-79. |
| APA | Wu, Naicheng.,Tang, Tao.,Zhou, Shuchan.,Jia, Xinghuan.,Li, Daofeng.,...&Cai, Qinghua.(2009).Changes in benthic algal communities following construction of a run-of-river dam.JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY,28(1),69-79. |
| MLA | Wu, Naicheng,et al."Changes in benthic algal communities following construction of a run-of-river dam".JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY 28.1(2009):69-79. |
入库方式： OAI收割
来源：水生生物研究所
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