气候变化领域集成服务门户(CCPortal): Prey nutrient content creates omnivores out of predators

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DOI	10.1111/ele.13186
	Prey nutrient content creates omnivores out of predators
	Ugine T.A.; Krasnoff S.B.; Grebenok R.J.; Behmer S.T.; Losey J.E.
发表日期	2019
ISSN	1461023X
卷号	22 期号:2
英文摘要	The proximate forces that create omnivores out of herbivores and predators have long fascinated ecologists, but the causal reasons for a shift to omnivory are poorly understood. Determining what factors influence changes in trophic position are essential as omnivory plays a central role in theoretical and applied ecology. We used sevenspotted lady beetles (Coccinella septempunctata) to test how prey nutrient content affects beetles’ propensity to engage in herbivory. We show that beetles consuming an all-prey diet demonstrate normal growth and development, but suffer a complete loss of fitness (spermatogenic failure) that is restored via herbivory and supplementation with phytosterols and cholesterol. Furthermore, we show that lady beetles possess a state-dependent sterol-specific appetite and redressed their sterol deficit by feeding on foliage. These results demonstrate that predators balance their nutrient intake via herbivory when prey quality is low, and reveal a selective force (sterol nutrition) that drives predatory taxa to omnivory. © 2018 John Wiley & Sons Ltd/CNRS
英文关键词	Appetite; evolution; facultative predator; herbivory; lipid; macronutrient; nutrient; omnivory; sterol; zoophytophagy
语种	英语
scopus关键词	Coccinella septempunctata; Coleoptera; animal; beetle; diet; food chain; herbivory; predation; Animals; Coleoptera; Diet; Food Chain; Herbivory; Nutrients; Predatory Behavior
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/121149
作者单位	Department of Entomology, Cornell University, Ithaca, NY 14853, United States; Emerging Pests and Pathogens Research Unit, USDA-ARS, Robert W. Holley Center, Ithaca, NY 14853-2901, United States; Department of Biology, Canisius College, Buffalo, NY 14208, United States; Department of Entomology, Texas A&M University, College Station, TX 77843-2475, United States
推荐引用方式 GB/T 7714	Ugine T.A.,Krasnoff S.B.,Grebenok R.J.,et al. Prey nutrient content creates omnivores out of predators[J],2019,22(2).
APA	Ugine T.A.,Krasnoff S.B.,Grebenok R.J.,Behmer S.T.,&Losey J.E..(2019).Prey nutrient content creates omnivores out of predators.Ecology Letters,22(2).
MLA	Ugine T.A.,et al."Prey nutrient content creates omnivores out of predators".Ecology Letters 22.2(2019).