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Journal Articles Ecological Modelling Year : 2005

Invading introduced species in insular heterogeneous environments

Abstract

We are concerned with the development and analysis of a predator–prey system designed for heterogeneous insular environments; populations are native preys exposed to introduced and invading predators and competitor preys. We first look at the unstructured model; this yields a singular system of ordinary differential equations having interesting dynamical features, such as finite time extinction or persistence of populations. Next we build a spatially heterogeneous structured model upon developing a reaction–diffusion system; then, using numerical experiments we analyze some typical effects of spatial heterogeneities on the persistence or extinction of native or introduced and invading species. The case of Kerguelen sub-Antartic heterogeneous islands where both domestic cats and alien preys have been introduced is taken as an example.

Dates and versions

hal-00195443 , version 1 (10-12-2007)

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S. Gaucel, Michel Langlais, Dominique Pontier. Invading introduced species in insular heterogeneous environments. Ecological Modelling, 2005, 188, pp.62-75. ⟨10.1016/j.ecolmodel.2005.05.008⟩. ⟨hal-00195443⟩
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