全球智库信息集成服务系统(G2TT): On the sympatric evolution and evolutionary stability of coexistence by relative nonlinearity of competition.

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来源类型	Article
规范类型	其他
DOI	10.1371/journal.pone.0094454
	On the sympatric evolution and evolutionary stability of coexistence by relative nonlinearity of competition.
	Hartig F; Muenkenmueller T; Johst K; Dieckmann U
发表日期	2014
出处	PLoS ONE 9 (9): e94454
出版年	2014
语种	英语
摘要	If two species exhibit different nonlinear responses to a single shared resource, and if each species modifies the resource dynamics such that this favors its competitor, they may stably coexist. This coexistence mechanism, known as relative nonlinearity of competition, is well understood theoretically, but less is known about its evolutionary properties and its prevalence in real communities. We address this challenge by using adaptive dynamics theory and individual-based simulations to compare community stabilization and evolutionary stability of species that coexist by relative nonlinearity. In our analysis, evolution operates on the species' density-compensation strategies, and we consider a trade-off between population growth rates at high and low resource availability. We confirm previous findings that, irrespective of the particular model of density dependence, there are many combinations of overcompensating and undercompensating density-compensation strategies that allow stable coexistence by relative nonlinearity. However, our analysis also shows that most of these strategy combinations are not evolutionarily stable and will be outcompeted by an intermediate density-compensation strategy. Only very specific trade-offs lead to evolutionarily stable coexistence by relative nonlinearity. As we find no reason why these particular trade-offs should be common in nature, we conclude that the sympatric evolution and evolutionary stability of relative nonlinearity, while possible in principle, seems rather unlikely. We speculate that this may, at least in part, explain why empirical demonstrations of this coexistence mechanism are rare, noting, however, that the difficulty to detect relative nonlinearity in the field is an equally likely explanation for the current lack of empirical observations, and that our results are limited to communities with non-overlapping generations and constant resource supply. Our study highlights the need for combining ecological and evolutionary perspectives for gaining a better understanding of community assembly and biogeographic patterns.
主题	Evolution and Ecology (EEP)
URL	http://pure.iiasa.ac.at/id/eprint/10852/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/129925
推荐引用方式 GB/T 7714	Hartig F,Muenkenmueller T,Johst K,et al. On the sympatric evolution and evolutionary stability of coexistence by relative nonlinearity of competition.. 2014.