title: Population extinction and survival in a hostile environment.
abstract: We study the conditions for extinction and survival of populations living in a patch surrounded by a hostile environment. We find analytic expressions for the steady states when population dynamics is described by diffusion and reaction is driven by compensation, depensation, or critical depensation growths. The role of initial population density is studied, and the complete bifurcation diagrams are constructed and validated numerically for the three cases studied.
authors: Grup de Física Estadística, Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
authors: Vicenç
authors: V
authors: Méndez
authors: Daniel
authors: D
authors: Campos
mesh_terms: D000818:Animals; D003198:Computer Simulation; D017753:Ecosystem; D053476:Extinction, Biological; D006801:Humans; D008954:Models, Biological; D011156:Population Density; D011157:Population Dynamics; D011158:Population Growth; D011235:Predatory Behavior / Q000502:physiology*; D016019:Survival Analysis