DOI: 10.1111/ele.12521
Scopus记录号: 2-s2.0-84943620390
论文题名: Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs
作者: Ryabov A.B. ; Morozov A. ; Blasius B.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2015
卷: 18, 期: 11 起始页码: 1262
结束页码: 1269
语种: 英语
英文关键词: Biodiversity
; Coexistence
; Ecosystem productivity
; Multi-prey functional response
; Paradox of plankton
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107843
Appears in Collections: 气候减缓与适应
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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
Recommended Citation:
Ryabov A.B.,Morozov A.,Blasius B.. Imperfect prey selectivity of predators promotes biodiversity and irregularity in food webs[J]. Ecology Letters,2015-01-01,18(11)