气候变化领域集成服务门户(CCPortal): Predators weaken prey intraspecific competition through phenotypic selection

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DOI	10.1111/ele.13491
	Predators weaken prey intraspecific competition through phenotypic selection
	Siepielski A.M.; Hasik A.Z.; Ping T.; Serrano M.; Strayhorn K.; Tye S.P.
发表日期	2020
ISSN	1461023X
起始页码	951
结束页码	961
卷号	23 期号:6
英文摘要	Predators have a key role shaping competitor dynamics in food webs. Perhaps the most obvious way this occurs is when predators reduce competitor densities. However, consumption could also generate phenotypic selection on prey that determines the strength of competition, thus coupling consumptive and trait-based effects of predators. In a mesocosm experiment simulating fish predation on damselflies, we found that selection against high damselfly activity rates – a phenotype mediating predation and competition – weakened the strength of density dependence in damselfly growth rates. A field experiment corroborated this finding and showed that increasing damselfly densities in lakes with high fish densities had limited effects on damselfly growth rates but generated a precipitous growth rate decline where fish densities were lower – a pattern expected because of spatial variation in selection imposed by predation. These results suggest that accounting for both consumption and selection is necessary to determine how predators regulate prey competitive interactions. © 2020 John Wiley & Sons Ltd/CNRS
关键词	Adaptation competition density dependence eco-evo food web predation selection
英文关键词	Zygoptera; animal; fish; food chain; Odonata; phenotype; predation; Animals; Fishes; Food Chain; Odonata; Phenotype; Predatory Behavior
语种	英语
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/204292
作者单位	Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, United States
推荐引用方式 GB/T 7714	Siepielski A.M.,Hasik A.Z.,Ping T.,et al. Predators weaken prey intraspecific competition through phenotypic selection[J],2020,23(6).
APA	Siepielski A.M.,Hasik A.Z.,Ping T.,Serrano M.,Strayhorn K.,&Tye S.P..(2020).Predators weaken prey intraspecific competition through phenotypic selection.Ecology Letters,23(6).
MLA	Siepielski A.M.,et al."Predators weaken prey intraspecific competition through phenotypic selection".Ecology Letters 23.6(2020).