The Evolution of Conditional Dispersal Strategies in Spatially Heterogeneous Habitats

摘要: To understand the evolution of dispersal, we study a Lotka-Volterra reaction-diffusion-advection model for two competing species in heterogeneous environment. The are assumed to be identical except their dispersal strategies: both disperse by random diffusion and advection along environmental gradients, but with slightly different or rates. Two new phenomena found one-dimensional habitats monotone intrinsic growth rates: (i) If only diffusion, i.e., no advection, it was well known that slower diffuser always wins. We show if have same rate which is suitably large, faster will evolve; (ii) rate, little resource gradient wins, provided other pure disperser habitat convex. also large rates, smaller Implications these results choices discussed. Some future directions open problems addressed.