| DOI: | 10.1111/ele.12874
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| Scopus记录号: | 2-s2.0-85032841021
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| 论文题名: | Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis |
| 作者: | Vidal M.C.; Murphy S.M.
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| 刊名: | Ecology Letters
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| ISSN: | 1461023X
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| EISSN: | 1461-0248
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| 出版年: | 2018
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| 卷: | 21, 期:1 | | 起始页码: | 138
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| 结束页码: | 150
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| 语种: | 英语
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| 英文关键词: | Bottom-up
; fitness
; herbivorous insects
; host-plant quality
; meta-analysis
; natural enemies
; parasitoid
; predator
; top-down
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| 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
|
| 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 |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/107520
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Biological Sciences, University of Denver, Denver, CO, United States
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| Recommended Citation: | |
Vidal M.C.,Murphy S.M.. Bottom-up vs. top-down effects on terrestrial insect herbivores: a meta-analysis[J]. Ecology Letters,2018-01-01,21(1)
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