期刊
MATHEMATICAL BIOSCIENCES AND ENGINEERING
卷 7, 期 1, 页码 17-36出版社
AMER INST MATHEMATICAL SCIENCES
DOI: 10.3934/mbe.2010.7.17
关键词
evolution of dispersal; ideal free distribution; reaction-diffusion-advection
资金
- NSF [DMS-0816068, DMS-0615845]
A general question in the study of the evolution of dispersal is what kind of dispersal strategies can convey competitive advantages and thus will evolve. We consider a two species competition model in which the species are assumed to have the same population dynamics but different dispersal strategies. Both species disperse by random diffusion and advection along certain gradients, with the same random dispersal rates but different advection coefficients. We found a conditional dispersal strategy which results in the ideal free distribution of species, and show that it is a local evolutionarily stable strategy. We further show that this strategy is also a global convergent stable strategy under suitable assumptions, and our results illustrate how the evolution of conditional dispersal can lead to an ideal free distribution. The underlying biological reason is that the species with this particular dispersal strategy can perfectly match the environmental resource, which leads to its fitness being equilibrated across the habitats.
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