气候变化领域集成服务门户(CCPortal): Dams have varying impacts on fish communities across latitudes: a quantitative synthesis

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DOI	10.1111/ele.13283
	Dams have varying impacts on fish communities across latitudes: a quantitative synthesis
	Turgeon K.; Turpin C.; Gregory-Eaves I.
发表日期	2019
ISSN	1461023X
卷号	22 期号:9
英文摘要	Dams are recognised to impact aquatic biodiversity, but the effects and conclusions diverge across studies and locations. By using a meta-analytical approach, we quantified the effects of impoundment on fish communities distributed across three large biomes. The impacts of dams on richness and diversity differed across biomes, with significant declines in the tropics, lower amplitude but similar directional changes in temperate regions, and no changes in boreal regions. Our analyses showed that non-native species increased significantly in tropical and temperate regulated rivers, but not in boreal rivers. In contrast, temporal trajectories in fish assemblage metrics were common across regions, with all biomes showing an increase in mean trophic level position and in the proportion of generalist species after impoundment. Such changes in fish assemblages may affect food web stability and merit closer study. Across the literature examined, predominant mechanisms that render fish assemblages susceptible to impacts from dams were: (1) the transformation of the lotic environment into a lentic environment; (2) habitat fragmentation and (3) the introduction of non-native species. Collectively, our results highlight that an understanding of the regional context and a suite of community metrics are needed to make robust predictions about how fish will respond to river impoundments. © 2019 John Wiley & Sons Ltd/CNRS
英文关键词	Biomes; fish; fluvial specialist; hydroelectricity; impoundment; invasive; meta-analysis; reservoirs; species assemblages; trophic level position; tropical
语种	英语
scopus关键词	assembly rule; biodiversity; biome; community dynamics; dam construction; ecological impact; fish; food web; habitat fragmentation; hydroelectric power; impoundment; invasive species; latitudinal gradient; quantitative analysis; specialist; species richness; trophic level; tropical environment; animal; biodiversity; fish; food chain; introduced species; river; water flow; Animals; Biodiversity; Fishes; Food Chain; Introduced Species; Rivers; Water Movements
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121191
作者单位	Department of Biology, McGill University, 1205 Docteur Penfield Avenue, Montreal, QC H3A 1B1, Canada; Hydro-Québec, Governance and Strategic Issues, 75 René-Lévesque, Montréal, QC H2Z 1A4, Canada; Université du Québec en Outaouais, Natural Sciences Department, 58, Rue Principale, Ripon, QC J0V 1V0, Canada
推荐引用方式 GB/T 7714	Turgeon K.,Turpin C.,Gregory-Eaves I.. Dams have varying impacts on fish communities across latitudes: a quantitative synthesis[J],2019,22(9).
APA	Turgeon K.,Turpin C.,&Gregory-Eaves I..(2019).Dams have varying impacts on fish communities across latitudes: a quantitative synthesis.Ecology Letters,22(9).
MLA	Turgeon K.,et al."Dams have varying impacts on fish communities across latitudes: a quantitative synthesis".Ecology Letters 22.9(2019).