Community-driven dispersal in an individual-based predator-prey model

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dc.creatorFilotas, Elise
dc.creatorGrant, Martin
dc.creatorParrott, Lael
dc.creatorRikvold, Per Arne
dc.date2007-03-18
dc.date2008-02-19
dc.date.accessioned2026-07-07T09:51:36Z
dc.date.available2026-07-07T09:51:36Z
dc.descriptionWe present 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.
dc.description43 pages, 7 figures, vocabulary modifications, discussion expanded, references added, Ecological Complexity accepted
dc.identifierhttps://arxiv.org/abs/q-bio/0703041
dc.identifierhttp://arxiv.org/abs/q-bio/0703041
dc.identifierEcological Complexity 5 (2008) 238-251
dc.identifierdoi:10.1016/j.ecocom.2008.01.002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165302
dc.subjectPopulations and Evolution
dc.subjectQuantitative Methods
dc.titleCommunity-driven dispersal in an individual-based predator-prey model
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