气候变化领域集成服务门户(CCPortal): Life-history strategy varies with the strength of competition in a food-limited ungulate population

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DOI	10.1111/ele.13470
	Life-history strategy varies with the strength of competition in a food-limited ungulate population
	Kentie R.; Clegg S.M.; Tuljapurkar S.; Gaillard J.-M.; Coulson T.
发表日期	2020
ISSN	1461023X
起始页码	811
结束页码	820
卷号	23 期号:5
英文摘要	Fluctuating population density in stochastic environments can contribute to maintain life-history variation within populations via density-dependent selection. We used individual-based data from a population of Soay sheep to examine variation in life-history strategies at high and low population density. We incorporated life-history trade-offs among survival, reproduction and body mass growth into structured population models and found support for the prediction that different life-history strategies are optimal at low and high population densities. Shorter generation times and lower asymptotic body mass were selected for in high-density environments even though heavier individuals had higher probabilities to survive and reproduce. In contrast, greater asymptotic body mass and longer generation times were optimal at low population density. If populations fluctuate between high density when resources are scarce, and low densities when they are abundant, the variation in density will generate fluctuating selection for different life-history strategies, that could act to maintain life-history variation. © 2020 John Wiley & Sons Ltd/CNRS
关键词	density dependence evolution IPM K-selection life history life-history trade-offs population dynamics r-selection Soay sheep stochasticity
英文关键词	Ovis aries; Ungulata; animal; evolution; life history trait; population density; population dynamics; reproduction; sheep; Animals; Biological Evolution; Life History Traits; Population Density; Population Dynamics; Reproduction; Sheep
语种	英语
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/204246
作者单位	Department of Zoology, University of Oxford, Oxford, OX1 3PS, United Kingdom; Department of Coastal Systems, NIOZ Royal Netherlands Institute for Sea Research, Utrecht University, P.O. Box 59, Den Burg, Texel, 1790 AB, Netherlands; Department of Zoology, Edward Grey Institute, University of OxfordOX1 3PS, United Kingdom; Department of Biology, Stanford University, Stanford, CA 94305-5020, United States; UMR 5558 Biometrie et Biologie Evolutive, Batiment G. Mendel, Universite Claude Bernard Lyon 1, 43 boulevard du 11 novembre 1918, Villeurbanne Cedex, 69622, France
推荐引用方式 GB/T 7714	Kentie R.,Clegg S.M.,Tuljapurkar S.,et al. Life-history strategy varies with the strength of competition in a food-limited ungulate population[J],2020,23(5).
APA	Kentie R.,Clegg S.M.,Tuljapurkar S.,Gaillard J.-M.,&Coulson T..(2020).Life-history strategy varies with the strength of competition in a food-limited ungulate population.Ecology Letters,23(5).
MLA	Kentie R.,et al."Life-history strategy varies with the strength of competition in a food-limited ungulate population".Ecology Letters 23.5(2020).