全球智库信息集成服务系统(G2TT): The evolution of resource specialization through frequency-dependent and frequency-independent mechanisms.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1086/498275
	The evolution of resource specialization through frequency-dependent and frequency-independent mechanisms.
	Rueffler C; Van Dooren TJM; Metz JAJ
发表日期	2006
出处	The American Naturalist 167 (1): 81-93
出版年	2006
语种	英语
摘要	Levins's fitness set approach has shaped the intuition of many evolutionary ecologists about resource specialization: if the set of possible phenotypes is convex, a generalist is favored, while either of the two specialists is predicted for concave phenotype sets. An important aspect of Levins's approach is that it explicitly excludes frequency-dependent selection. Frequency dependence emerged in a series of models that studied the degree of character displacement of two consumers coexisting on two resources. Surprisingly, the evolutionary dynamics of a single consumer type under frequency dependence has not been studied in detail. We analyze a model of one evolving consumer feeding on two resources and show that, depending on the trait considered to be subject to evolutionary change, selection is either frequency independent or frequency dependent. This difference is explained by the effects different foraging traits have on the consumer-resource interactions. If selection is frequency dependent, then the population can become dimorphic through evolutionary branching at the trait value of the generalist. Those traits with frequency-independent selection, however, do indeed follow the predictions based on Levins's fitness set approach. This dichotomy in the evolutionary dynamics of traits involved in the same foraging process was not previously recognized.
主题	Evolution and Ecology (EEP)
URL	http://pure.iiasa.ac.at/id/eprint/7865/
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/128545
推荐引用方式 GB/T 7714	Rueffler C,Van Dooren TJM,Metz JAJ. The evolution of resource specialization through frequency-dependent and frequency-independent mechanisms.. 2006.