气候变化领域集成服务门户(CCPortal): Spatial social dilemmas promote diversity

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DOI	10.1073/pnas.2105252118
	Spatial social dilemmas promote diversity
	Hauert C.; Doebeli M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:42
英文摘要	Cooperative investments in social dilemmas can spontaneously diversify into stably coexisting high and low contributors in well-mixed populations. Here we extend the analysis to emerging diversity in (spatially) structured populations. Using pair approximation, we derive analytical expressions for the invasion fitness of rare mutants in structured populations, which then yields a spatial adaptive dynamics framework. This allows us to predict changes arising from population structures in terms of existence and location of singular strategies, as well as their convergence and evolutionary stability as compared to well-mixed populations. Based on spatial adaptive dynamics and extensive individual-based simulations, we find that spatial structure has significant and varied impacts on evolutionary diversification in continuous social dilemmas. More specifically, spatial adaptive dynamics suggests that spontaneous diversification through evolutionary branching is suppressed, but simulations show that spatial dimensions offer new modes of diversification that are driven by an interplay of finite-size mutations and population structures. Even though spatial adaptive dynamics is unable to capture these new modes, they can still be understood based on an invasion analysis. In particular, population structures alter invasion fitness and can open up new regions in trait space where mutants can invade, but that may not be accessible to small mutational steps. Instead, stochastically appearing larger mutations or sequences of smaller mutations in a particular direction are required to bridge regions of unfavorable traits. The net effect is that spatial structure tends to promote diversification, especially when selection is strong. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Adaptive dynamics; Continuous games; Evolutionary branching; Social dilemmas; Structured populations
语种	英语
scopus关键词	article; collective action problem; human; population structure; simulation; stochastic model; structure activity relation; biodiversity; biological model; evolution; mutation; prisoner dilemma; Biodiversity; Biological Evolution; Models, Genetic; Mutation; Prisoner Dilemma
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251003
作者单位	Department of Mathematics, University of British Columbia, Vancouver, BC V6T 1Z2, Canada; Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
推荐引用方式 GB/T 7714	Hauert C.,Doebeli M.. Spatial social dilemmas promote diversity[J],2021,118(42).
APA	Hauert C.,&Doebeli M..(2021).Spatial social dilemmas promote diversity.Proceedings of the National Academy of Sciences of the United States of America,118(42).
MLA	Hauert C.,et al."Spatial social dilemmas promote diversity".Proceedings of the National Academy of Sciences of the United States of America 118.42(2021).