Influences of low-head dams on the fish assemblages in the headwater streams of the Qingyi watershed, China
文献类型：期刊论文
| 作者 | Yan, Yunzhi1; Wang, Hong1; Zhu, Ren1; Chu, Ling1; Chen, Yifeng2 |
| 刊名 | ENVIRONMENTAL BIOLOGY OF FISHES
 |
| 出版日期 | 2013-04-01 |
| 卷号 | 96期号:4页码:495-506 |
| 关键词 | Low-head dams Local habitat Stream fish assemblage Qingyi watershed |
| ISSN号 | 0378-1909 |
| 通讯作者 | Yan, YZ (reprint author), Anhui Normal Univ, Coll Life Sci, Prov Key Lab Biot Environm & Ecol Safety Anhui, Wuhu 241000, Peoples R China. |
| 中文摘要 | The influences of low-head dams on the fish assemblages were examined in this study, using fish data collected in six treatment and five reference sites at three low-head dams in the headwater streams of the Qingyi watershed, China. Comparing with those in the reference sites, local habitat variables were significantly altered by low-head dams in the treatment sites, involving wider channel (only in the impoundment area), deeper water and slower flow. Fish species richness varied significantly across seasons, not across site categories, suggesting that these low-head dams did not alter species richness. However, significant decreases in fish abundance and density were observed in the impoundment areas immediately upstream of dams, but not in the plunge areas downstream. Fish assemblage structures kept relative stability across seasons, and their significant difference between-site was only observed between the impoundment areas and the sites far from dams upstream. This variation in assemblage structures was due to the differing relative abundance of some co-occurring species; more lentic but less lotic fish was observed in the impoundment areas. The spatial and temporal patterns of fish assemblages were correlated with local habitat in this study area. Wetted width had negative correlation with fish species richness, abundance and density, respectively. Water temperature also positively affected species richness. In addition, wetted width, water depth, current velocity and substrate were the important habitat variables influencing assemblage structures. Our results suggested that, by modifying local habitat characteristics, low-head dams altered fish abundance and density in the impoundment areas immediately upstream of dam, not in the plunge areas immediately downstream, and thereby influenced fish assemblage structures in these stream segments. |
| 英文摘要 | The influences of low-head dams on the fish assemblages were examined in this study, using fish data collected in six treatment and five reference sites at three low-head dams in the headwater streams of the Qingyi watershed, China. Comparing with those in the reference sites, local habitat variables were significantly altered by low-head dams in the treatment sites, involving wider channel (only in the impoundment area), deeper water and slower flow. Fish species richness varied significantly across seasons, not across site categories, suggesting that these low-head dams did not alter species richness. However, significant decreases in fish abundance and density were observed in the impoundment areas immediately upstream of dams, but not in the plunge areas downstream. Fish assemblage structures kept relative stability across seasons, and their significant difference between-site was only observed between the impoundment areas and the sites far from dams upstream. This variation in assemblage structures was due to the differing relative abundance of some co-occurring species; more lentic but less lotic fish was observed in the impoundment areas. The spatial and temporal patterns of fish assemblages were correlated with local habitat in this study area. Wetted width had negative correlation with fish species richness, abundance and density, respectively. Water temperature also positively affected species richness. In addition, wetted width, water depth, current velocity and substrate were the important habitat variables influencing assemblage structures. Our results suggested that, by modifying local habitat characteristics, low-head dams altered fish abundance and density in the impoundment areas immediately upstream of dam, not in the plunge areas immediately downstream, and thereby influenced fish assemblage structures in these stream segments. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Ecology ; Marine & Freshwater Biology |
| 研究领域[WOS] | Environmental Sciences & Ecology ; Marine & Freshwater Biology |
| 关键词[WOS] | RIVER-BASIN ; LOWHEAD DAMS ; HABITAT ; USA ; PATTERNS ; MACROINVERTEBRATES ; BIODIVERSITY ; COMMUNITIES ; PERSPECTIVE ; INTEGRITY |
| 收录类别 | SCI |
| 资助信息 | National Basic Research Program of China [2009CB119200]; Natural Science Foundation of China [31172120]; Anhui Provincial Natural Science Foundation [090413080] |
| 语种 | 英语 |
| WOS记录号 | WOS:000315595200007 |
| 公开日期 | 2013-10-31 |
| 源URL | [http://ir.ihb.ac.cn/handle/342005/19262]  |
| 专题 | 水生生物研究所_水生生物多样性与资源保护研究中心_期刊论文 |
| 作者单位 | 1.Anhui Normal Univ, Coll Life Sci, Prov Key Lab Biot Environm & Ecol Safety Anhui, Wuhu 241000, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Yunzhi,Wang, Hong,Zhu, Ren,et al. Influences of low-head dams on the fish assemblages in the headwater streams of the Qingyi watershed, China[J]. ENVIRONMENTAL BIOLOGY OF FISHES,2013,96(4):495-506. |
| APA | Yan, Yunzhi,Wang, Hong,Zhu, Ren,Chu, Ling,&Chen, Yifeng.(2013).Influences of low-head dams on the fish assemblages in the headwater streams of the Qingyi watershed, China.ENVIRONMENTAL BIOLOGY OF FISHES,96(4),495-506. |
| MLA | Yan, Yunzhi,et al."Influences of low-head dams on the fish assemblages in the headwater streams of the Qingyi watershed, China".ENVIRONMENTAL BIOLOGY OF FISHES 96.4(2013):495-506. |
入库方式： OAI收割
来源：水生生物研究所
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