DOI: 10.1111/ele.13772
论文题名: Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities
作者: Dijoux S. ; Boukal D.S.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2021
卷: 24, 期: 8 起始页码: 1607
结束页码: 1618
语种: 英语
中文关键词: alternative stable states
; Apparent competition
; emergent Allee effects
; limiting similarity
; size-dependent predation
英文关键词: animal
; body size
; food chain
; phenotype
; predation
; Animals
; Body Size
; Food Chain
; Phenotype
; Predatory Behavior
英文摘要: Multichannel food webs are shaped by the ability of apex predators to link asymmetric energy flows in mesohabitats differing in productivity and community traits. While body size is a fundamental trait underlying life histories and demography, its implications for structuring multichannel food webs are unexplored. To fill this gap, we develop a model that links population responses to predation, and resource availability to community-level patterns, using a tri-trophic food web model with two populations of intermediate consumers and a size-selective top predator. We show that asymmetries in mesohabitat productivities and consumer body sizes drive food web structure, merging previously separate theory on apparent competition and emergent Allee effects (i.e. abrupt population collapses) of top predators. Our results yield theoretical support for empirically observed stability of asymmetric multichannel food webs and discover three novel types of emergent Allee effects involving intermediate consumers, multiple populations or multiple alternative stable states. © 2021 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166817
Appears in Collections: 气候变化与战略
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作者单位: Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic; Czech Academy of Sciences, Biology Centre, Institute of Entomology, České Budějovice, Czech Republic
Recommended Citation:
Dijoux S.,Boukal D.S.. Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities[J]. Ecology Letters,2021-01-01,24(8)