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来源类型Article
规范类型其他
DOI10.1016/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
URLhttp://pure.iiasa.ac.at/id/eprint/9287/
来源智库International Institute for Applied Systems Analysis (Austria)
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资源类型智库出版物
条目标识符http://119.78.100.153/handle/2XGU8XDN/129168
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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.
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