期刊
JOURNAL OF THE ROYAL SOCIETY INTERFACE
卷 15, 期 145, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsif.2018.0343
关键词
population dynamics; evolution; ecology; fluctuations; cooperation dilemma; public goods
资金
- Deutsche Forschungsgemeinschaft, Priority Programme 1617 'Phenotypic heterogeneity and sociobiology of bacterial populations' [FR 850/11-1,2]
- German Excellence Initiative via the program 'Nanosystems Initiative Munich' (NIM)
- Alexander von Humboldt Foundation [GBR/1119205 STP]
Environmental variability greatly influences the eco-evolutionary dynamics of apopulation, i.e. it affects how its size and composition evolve. Here, we study a well-mixed population of finite and fluctuating size whose growth is limited by a randomly switching carrying capacity. This models the environmental fluctuations between states of resources abundance and scarcity. The population consists of two strains, one growing slightly faster than the other, competing under two scenarios: one in which competition is solely for resources, and one in which the slow (cooperating) strain produces a public good (PG) that benefits also the fast (free-riding) strain. We investigate how the coupling of demographic and environmental (external) noise affects the population's eco-evolutionary dynamics. By analytical and computational means, we study the correlations between the population size and its composition, and discuss the social-dilemma-like 'eco-evolutionary game' characterizing the PG production. We determine in what conditions it is best to produce a PG; when cooperating is beneficial but outcompeted by free riding, and when the PG production is detrimental for cooperators. Within a linear noise approximation to populations of varying size, we also accurately analyse the coupled effects of demographic and environmental noise on the size distribution.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据