Scopus记录号: 2-s2.0-85058127578
论文题名: Prey nutrient content creates omnivores out of predators
作者: Ugine T.A. ; Krasnoff S.B. ; Grebenok R.J. ; Behmer S.T. ; Losey J.E.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2019
卷: 22, 期: 2 起始页码: 275
结束页码: 283
语种: 英语
英文关键词: Appetite
; evolution
; facultative predator
; herbivory
; lipid
; macronutrient
; nutrient
; omnivory
; sterol
; zoophytophagy
Scopus关键词: Coccinella septempunctata
; Coleoptera
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 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122744
Appears in Collections: 气候变化事实与影响
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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
Recommended Citation:
Ugine T.A.,Krasnoff S.B.,Grebenok R.J.,et al. Prey nutrient content creates omnivores out of predators[J]. Ecology Letters,2019-01-01,22(2)