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.
Pigolotti, S., & BENZI, R. (2016). Competition between fast- and slow-diffusing species in non-homogeneous environments. JOURNAL OF THEORETICAL BIOLOGY, 395, 204-210 [10.1016/j.jtbi.2016.01.033].
|Tipologia:||Articolo su rivista|
|Citazione:||Pigolotti, S., & BENZI, R. (2016). Competition between fast- and slow-diffusing species in non-homogeneous environments. JOURNAL OF THEORETICAL BIOLOGY, 395, 204-210 [10.1016/j.jtbi.2016.01.033].|
|Settore Scientifico Disciplinare:||Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici|
|Revisione (peer review):||Esperti anonimi|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.jtbi.2016.01.033|
|Stato di pubblicazione:||Pubblicato|
|Data di pubblicazione:||21-apr-2016|
|Titolo:||Competition between fast- and slow-diffusing species in non-homogeneous environments|
|Autori:||Pigolotti, S; BENZI, R|
|Appare nelle tipologie:||01 - Articolo su rivista|