全球智库信息集成服务系统(G2TT): Evolution restricts the coexistence of specialists and generalists: The role of trade-off structure.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1086/382599
	Evolution restricts the coexistence of specialists and generalists: The role of trade-off structure.
	Egas M; Dieckmann U; Sabelis MW
发表日期	2004
出处	The American Naturalist 163 (4): 518-531
出版年	2004
语种	英语
摘要	Environmental variability and adaptive foraging behavior have been shown to favor coexistence of specialists and generalists on an ecological timescale. This leaves unaddressed the question of whether such coexistence can also be expected on an evolutionary timescale. In this article, we study the attainability, through gradual evolution, of specialist-generalist coexistence, as well as the evolutionary stability of such communities when allowing for immigration. Our analysis shows that the potential for specialist-generalist coexistence is much more restricted than originally thought and strongly depends on the trade-off structure assumed. We establish that ecological coexistence is less likely for species facing a trade-off between per capita reproduction in different habitats than when the trade-off acts on carrying capacities alone. We also demonstrate that coexistence is evolutionarily stable whenever it is ecologically stable but that in most cases, such coexistence cannot be reached through gradual evolution. We conclude that an evolutionarily stable community of specialists and generalists may be created only through immigration from elsewhere or through mutations of large effect. Our results highlight that trade-offs in fitness-determining traits can have counterintuitive effects on the evolution of specialization.
主题	Adaptive Dynamics Network (ADN)
关键词	Coexistence evolution foraging behavior specialization temporal heterogeneity trade-off structure
URL	http://pure.iiasa.ac.at/id/eprint/7160/
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/128383
推荐引用方式 GB/T 7714	Egas M,Dieckmann U,Sabelis MW. Evolution restricts the coexistence of specialists and generalists: The role of trade-off structure.. 2004.