气候变化领域集成服务门户(CCPortal): Decomposing an elevational gradient in predation by insectivorous birds

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DOI	10.1002/ecs2.4790
	Decomposing an elevational gradient in predation by insectivorous birds
	Dean, Lydia S.; Vazquez-Gonzalez, Carla; Hellwitz, Sierra; Abdala-Roberts, Luis; Mooney, Kailen A.
发表日期	2024
ISSN	2150-8925
起始页码	15
结束页码	2
卷号	15 期号:2
英文摘要	Insectivorous birds have ecologically important effects on prey abundance, behavior, and evolution, and through top-down control, birds indirectly reduce herbivory and promote plant growth. While several studies sought to characterize biogeographic patterns in top-down control by birds, variation in bird predation along elevational gradients is not well characterized in terms of both its commonness and the mechanisms underlying such variation. Here, we characterized variation in bird predation along a 700-m montane elevation gradient using artificial clay caterpillars, assessing the roles of variation in aridity, other elevational effects not associated with aridity (e.g., most notably growing season length), and bird abundance and diversity. Multivariate models revealed increasing attack rates with aridity (when controlling for the effects of elevation) and elevation (when controlling for aridity). Because aridity declines with elevation, elevational patterns were not detectable in a univariate analysis. Bird abundance (but not diversity) decreased with elevation (but not aridity) and did not provide an explanation for our results, suggesting that the underlying mechanisms were behaviorally based. We speculate that the declining abundance of insect prey with elevation and aridity leads to increased bird foraging efforts and thus the likelihood of attacking clay caterpillars. If widespread, these dynamics have important consequences for both the interpretation of predation bioassays generally and our understanding of the multivariate drivers of variation in top-down control by predators and predation risks experienced by prey.
英文关键词	biotic interactions; bird predation; climate gradients; natural enemies; Populus tremuloides; predator-prey interactions
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001162909300001
来源期刊	ECOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298157
作者单位	University of California System; University of California Irvine; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad Autonoma de Yucatan
推荐引用方式 GB/T 7714	Dean, Lydia S.,Vazquez-Gonzalez, Carla,Hellwitz, Sierra,et al. Decomposing an elevational gradient in predation by insectivorous birds[J],2024,15(2).
APA	Dean, Lydia S.,Vazquez-Gonzalez, Carla,Hellwitz, Sierra,Abdala-Roberts, Luis,&Mooney, Kailen A..(2024).Decomposing an elevational gradient in predation by insectivorous birds.ECOSPHERE,15(2).
MLA	Dean, Lydia S.,et al."Decomposing an elevational gradient in predation by insectivorous birds".ECOSPHERE 15.2(2024).