title: Persistence criteria for populations with non-local dispersion.
abstract: In this article, we analyse the non-local model: [Formula: see text]where J is a positive continuous dispersal kernel and f(x, u) is a heterogeneous KPP type non-linearity describing the growth rate of the population. The ecological niche of the population is assumed to be bounded (i.e. outside a compact set, the environment is assumed to be lethal for the population). For compactly supported dispersal kernels J, we derive an optimal persistence criteria. We prove that a positive stationary solution exists if and only if the generalised principal eigenvalue [Formula: see text] of the linear problem [Formula: see text]is negative. [Formula: see text] is a spectral quantity that we defined in the spirit of the generalised first eigenvalue of an elliptic operator. In addition, for any continuous non-negative initial data that is bounded or integrable, we establish the long time behaviour of the solution u(t, x). We also analyse the impact of the size of the support of the dispersal kernel on the persistence criteria. We exhibit situations where the dispersal strategy has "no impact" on the persistence of the species and other ones where the slowest dispersal strategy is not any more an "Ecological Stable Strategy". We also discuss persistence criteria for fat-tailed kernels.
authors.affiliation: CAMS - École des Hautes Études en Sciences Sociales, 190-198 avenue de France, 75013, Paris, France.
authors.forename: Henri
authors.initials: H
authors.lastname: Berestycki
authors.affiliation: UR 546 Biostatistique et Processus Spatiaux, INRA, Domaine St Paul Site Agroparc, 84000, Avignon, France. jerome.coville@avignon.inra.fr.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Coville
authors.affiliation: Faculty of Mathematics and Statistics, Ton Duc Thang University, 19 Nguyen Huu Tho, Tan Phong, Ho Chi Minh City, Viet Nam.
authors.forename: Hoang-Hung
authors.initials: HH
authors.lastname: Vo
mesh_terms: D004463:Ecology; D017753:Ecosystem; D004777:Environment; D008954:Models, Biological; D011156:Population Density; D011157:Population Dynamics
keywords: Asymptotic behaviours; Dispersal budget; ESS; Heterogeneous KPP nonlocal equation; Persistence criteria