全球智库信息集成服务系统(G2TT): Heterogeneity in local density allows a positive evolutionary relationship between self-fertilisation and dispersal.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1111/evo.13562
	Heterogeneity in local density allows a positive evolutionary relationship between self-fertilisation and dispersal.
	Rodger J; Landi P; Hui C
发表日期	2018
出处	Evolution 72 (9): 1784-1800
出版年	2018
语种	英语
摘要	Despite empirical evidence for a positive relationship between dispersal and self-fertilisation (selfing), theoretical work predicts that these traits should always be negatively correlated, and the Good Coloniser Syndrome of high dispersal and selfing (Cf. Baker's Law) should not evolve. Critically, previous work assumes that adult density is spatiotemporally homogeneous, so selfing results in identical offspring production for all patches, eliminating the benefit of dispersal for escaping from local resource competition. We investigate the joint evolution of dispersal and selfing in a demographically structured metapopulation model where local density is spatiotemporally heterogeneous due to extinction-recolonisation dynamics. Selfing alleviates outcrossing failure due to low local density (an Allee Effect) while dispersal alleviates competition through dispersal of propagules from high- to low-density patches. Because local density is spatiotemporally heterogenous in our model, selfing does not eliminate heterogeneity in competition, so dispersal remains beneficial even under full selfing. Hence the Good Coloniser Syndrome is evolutionarily stable under a broad range of conditions, and both negative and positive relationships between dispersal and selfing are possible, depending on the environment. Our model thus accommodates positive empirical relationships between dispersal and selfing not predicted by previous theoretical work and provides additional explanations for negative relationships.
主题	Evolution and Ecology (EEP)
关键词	Adaptive dynamics Allee Effects Baker's Law dispersal mating system self-fertilisation
URL	http://pure.iiasa.ac.at/id/eprint/15386/
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/131506
推荐引用方式 GB/T 7714	Rodger J,Landi P,Hui C. Heterogeneity in local density allows a positive evolutionary relationship between self-fertilisation and dispersal.. 2018.