کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4495849 | 1623815 | 2016 | 7 صفحه PDF | دانلود رایگان |
• We consider competition between a fast- and a slow-diffusing species.
• We study which ecological forces favor either of the two species.
• We interpret the results in terms of an “effective” selective advantage.
We study an individual-based model in which two spatially distributed species, characterized by different diffusivities, compete for resources. We consider three different ecological settings. In the first, diffusing faster has a cost in terms of reproduction rate. In the second case, resources are not uniformly distributed in space. In the third case, the two species are transported by a fluid flow. In all these cases, at varying the parameters, we observe a transition from a regime in which diffusing faster confers an effective selective advantage to one in which it constitutes a disadvantage. We analytically estimate the magnitude of this advantage (or disadvantage) and test it by measuring fixation probabilities in simulations of the individual-based model. Our results provide a framework to quantify evolutionary pressure for increased or decreased dispersal in a given environment.
Journal: Journal of Theoretical Biology - Volume 395, 21 April 2016, Pages 204–210