A singular reaction-diffusion system modelling prey-predator interactions : Invasion and co-extinction waves
Langue
en
Article de revue
Ce document a été publié dans
Journal of Differential Equations. 2012, vol. 253, p. 502-532
Elsevier
Résumé en anglais
We consider a singular reaction-diffusion system arising in modelling prey-predator interactions in a fragile environment. Since the underlying ODEs system exhibits a complex dynamics including possible finite time quenching, ...Lire la suite >
We consider a singular reaction-diffusion system arising in modelling prey-predator interactions in a fragile environment. Since the underlying ODEs system exhibits a complex dynamics including possible finite time quenching, one first provides a suitable notion of global travelling wave weak solution. Then our study focusses on the existence of travelling waves solutions for predator invasion in such environments. We devise a regularized problem to prove the existence of travelling wave solutions for predator invasion followed by a possible co-extinction tail for both species. Under suitable assumptions on the diffusion coefficients and on species growth rates we show that travelling wave solutions are actually positive on a half line and identically zero elsewhere, such a property arising for every admissible wave speeds.< Réduire
Mots clés en anglais
Singular reaction-diffusion system \sep Travelling waves \sep Finite time extinction
Origine
Importé de halUnités de recherche