气候变化领域集成服务门户(CCPortal): Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs

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DOI	10.1111/ele.12521
	Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs
	Ryabov A.B.; Morozov A.; Blasius B.
发表日期	2015
ISSN	1461-023X
EISSN	1461-0248
卷号	18 期号:11
英文摘要	Ecological communities are often characterised by many species occupying the same trophic level and competing over a small number of vital resources. The mechanisms maintaining high biodiversity in such systems are still poorly understood. Here, we revisit the role of prey selectivity by generalist predators in promoting biodiversity. We consider a generic tri-trophic food web, consisting of a single limiting resource, a large number of primary producers and a generalist predator. We suggest a framework to describe the predator functional response, combining food selectivity for distinctly different functional prey groups with proportion-based consumption of similar prey species. Our simulations reveal that intermediate levels of prey selectivity can explain a high species richness, functional biodiversity, and variability among prey species. In contrast, perfect food selectivity or purely proportion-based food consumption leads to a collapse of prey functional biodiversity. Our results are in agreement with empirical phytoplankton rank-abundance curves in lakes. © 2015 John Wiley & Sons Ltd/CNRS.
英文关键词	Biodiversity; Coexistence; Ecosystem productivity; Multi-prey functional response; Paradox of plankton
学科领域	abundance; biodiversity; coexistence; ecosystem function; food limitation; food preference; food web; functional group; phytoplankton; predator; prey availability; prey preference; trophic level
语种	英语
scopus关键词	abundance; biodiversity; coexistence; ecosystem function; food limitation; food preference; food web; functional group; phytoplankton; predator; prey availability; prey preference; trophic level
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/118622
作者单位	University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany; Department of Mathematics, University of Leicester, Leicester, United Kingdom; Shirshov Institute of Oceanology, RAS, Moscow, Russian Federation
推荐引用方式 GB/T 7714	Ryabov A.B.,Morozov A.,Blasius B.. Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs[J],2015,18(11).
APA	Ryabov A.B.,Morozov A.,&Blasius B..(2015).Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs.Ecology Letters,18(11).
MLA	Ryabov A.B.,et al."Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs".Ecology Letters 18.11(2015).