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Filotas, E.; Grant, M.; Parrott, L. et Rikvold, P.A. (2008). Community-driven dispersal in an individual-based predator–prey model. Ecological Complexity, 5, 238-251. https://doi.org/10.1016/j.ecocom.2008.01.002
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| Catégorie de document : | Articles de revues |
|---|---|
| Évaluation par un comité de lecture : | Oui |
| Étape de publication : | Publié |
| Résumé : | Wepresent a spatial, individual-based predator–prey model in which dispersal is dependent on the local community. We determine species suitability to the biotic conditions of their local environment through a time and space varying fitness measure. Dispersal of individuals to nearby communities occurs whenever their fitness falls below a predefined tolerance threshold. The spatiotemporal dynamics of the model is described in terms of this threshold. We compare this dynamics with the one obtained through density-independent dispersal and find marked differences. In the community-driven scenario, the spatial correlations in the population density do not vary in a linear fashion as we increase the tolerance threshold. Instead we find the system to cross different dynamical regimes as the threshold is raised. Spatial patterns evolve from disordered, to scale-free complex patterns, to finally becoming well-organized domains. This model therefore predicts that natural populations, the dispersal strategies of which are likely to be influenced by their local environment, might be subject to complex spatiotemporal dynamics. |
| Déposant: | Filotas, Élise |
| Responsable : | Élise Filotas |
| Dépôt : | 04 mars 2016 15:06 |
| Dernière modification : | 30 oct. 2019 15:30 |
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