全球智库信息集成服务系统(G2TT): The risk of competitive exclusion during evolutionary branching: Effects of resource variability, correlation and autocorrelation.

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来源类型	Article
规范类型	其他
DOI	10.1016/j.tpb.2009.10.007
	The risk of competitive exclusion during evolutionary branching: Effects of resource variability, correlation and autocorrelation.
	Johansson J; Ripa J; Kucklaender N
发表日期	2010
出处	Theoretical Population Biology 77 (2): 95-104
出版年	2010
语种	英语
摘要	Evolutionary branching has been suggested as a mechanism to explain ecological speciation processes. Recent studies indicate however that demographic stochasticity and environmental fluctuations may prevent branching through stochastic competitive exclusion. Here we extend previous theory in several ways; we use a more mechanistic ecological model, we incorporate environmental fluctuations in a more realistic way and we include environmental autocorrelation in the analysis. We present a single, comprehensible analytical result which summarizes most effects of environmental fluctuations on evolutionary branching driven by resource competition. Corroborating earlier findings, we show that branching may be delayed or impeded if the underlying resources have uncorrelated or negatively correlated responses to environmental fluctuations. There is also a strong impeding effect of positive environmental autocorrelation, which can be related to results from recent experiments on adaptive radiation in bacterial microcosms. In addition, we find that environmental fluctuations can lead to cycles of repeated branching and extinction.
主题	Evolution and Ecology (EEP) ; Postdoctoral Scholars (PDS)
关键词	Evolutionary branching Competitive speciation Stochastic environment Environmental correlation Autocorrelation Competitive exclusion
URL	http://pure.iiasa.ac.at/id/eprint/9287/
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/129168
推荐引用方式 GB/T 7714	Johansson J,Ripa J,Kucklaender N. The risk of competitive exclusion during evolutionary branching: Effects of resource variability, correlation and autocorrelation.. 2010.