Dispersal vs. stochasticity: Competition for persistence in a reaction-diffusion model with strong Allee dynamics

M.A. Budroni, F. Rossi, E. Farris, R. Filigheddu and M. Rustici

Ecological Modelling, 2011, vol. 222, issue 16, 2891-2896

Abstract: In ecological and population dynamics, the coupling between random perturbations and the Allee effect could drive small and confined populations of rare species to extinction. In this paper, we propose a general model for describing spatio-temporal dynamics characterized by demographic Allee growth. In this approach, we include the combined contribution of stochasticity and spatial processes, typically dispersal, which is scarcely explored in the literature. The model is formulated in a reaction-diffusion framework, where the dynamics is regulated by a typical Allee–dispersal evolution and the resilience to white noise is probed at different perturbation amplitudes. Preliminary results show that dispersal processes can compensate random fluctuations to favor the stabilization of the species establishment.

Keywords: Allee effect; Population dynamics; Pseudo-stochastic reaction-diffusion processes; Mediterranean plants (search for similar items in EconPapers)
Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:222:y:2011:i:16:p:2891-2896

DOI: 10.1016/j.ecolmodel.2011.05.015

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