气候变化领域集成服务门户(CCPortal): Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis

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DOI	10.1111/ele.12874
	Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis
	Vidal M.C.; Murphy S.M.
发表日期	2018
ISSN	1461023X
卷号	21 期号:1
英文摘要	Primary consumers are under strong selection from resource (‘bottom-up’) and consumer (‘top-down’) controls, but the relative importance of these selective forces is unknown. We performed a meta-analysis to compare the strength of top-down and bottom-up forces on consumer fitness, considering multiple predictors that can modulate these effects: diet breadth, feeding guild, habitat/environment, type of bottom-up effects, type of top-down effects and how consumer fitness effects are measured. We focused our analyses on the most diverse group of primary consumers, herbivorous insects, and found that in general top-down forces were stronger than bottom-up forces. Notably, chewing, sucking and gall-making herbivores were more affected by top-down than bottom-up forces, top-down forces were stronger than bottom-up in both natural and controlled (cultivated) environments, and parasitoids and predators had equally strong top-down effects on insect herbivores. Future studies should broaden the scope of focal consumers, particularly in understudied terrestrial systems, guilds, taxonomic groups and top-down controls (e.g. pathogens), and test for more complex indirect community interactions. Our results demonstrate the surprising strength of forces exerted by natural enemies on herbivorous insects, and thus the necessity of using a tri-trophic approach when studying insect-plant interactions. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Bottom-up; fitness; herbivorous insects; host-plant quality; meta-analysis; natural enemies; parasitoid; predator; top-down
语种	英语
scopus关键词	bottom-up control; fitness; herbivore; host plant; host quality; insect; meta-analysis; natural enemy; parasitoid; plant-insect interaction; predator; terrestrial environment; top-down control; Hexapoda; animal; ecosystem; food chain; herbivory; insect; meta analysis; Animals; Ecosystem; Food Chain; Herbivory; Insecta
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/121375
作者单位	Department of Biological Sciences, University of Denver, Denver, CO, United States
推荐引用方式 GB/T 7714	Vidal M.C.,Murphy S.M.. Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis[J],2018,21(1).
APA	Vidal M.C.,&Murphy S.M..(2018).Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis.Ecology Letters,21(1).
MLA	Vidal M.C.,et al."Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis".Ecology Letters 21.1(2018).