Metapopulation dynamics in a complex ecological landscape

摘要: We propose a general model to study the interplay between spatial dispersal and environment spatiotemporal fluctuations in metapopulation dynamics. An ecological landscape of favorable patches is generated like Levy dust, which allows build range patterns, from dispersed clustered ones. Locally, dynamics driven by canonical for time evolution population density, consisting logistic expression plus multiplicative noises. Spatial coupling introduced means two spreading mechanisms: diffusion selective patch suitability. focus on long-time size as function habitat configurations, fluctuations, schemes. obtain conditions, that distribution mechanisms must fulfill, grant survival. The fundamental phenomenon we observe positive feedback spread preventing extinction.