气候变化领域集成服务门户(CCPortal): Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities

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DOI	10.1111/ele.13772
	Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities
	Dijoux S.; Boukal D.S.
发表日期	2021
ISSN	1461023X
起始页码	1607
结束页码	1618
卷号	24 期号:8
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.
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
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/204376
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
推荐引用方式 GB/T 7714	Dijoux S.,Boukal D.S.. Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities[J],2021,24(8).
APA	Dijoux S.,&Boukal D.S..(2021).Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities.Ecology Letters,24(8).
MLA	Dijoux S.,et al."Community structure and collapses in multichannel food webs: Role of consumer body sizes and mesohabitat productivities".Ecology Letters 24.8(2021).