title: Discrete-time travelling waves: ecological examples.
abstract: Integrodifference equations are discrete-time models that possess many of the attributes of continuous-time reaction-diffusion equations. They arise naturally in population biology as models for organisms with discrete nonoverlapping generations and well-defined growth and dispersal stages. I examined the varied travelling waves that arise in some simple ecologically-interesting integro-difference equations. For a scalar equation with compensatory growth, I observed only simple travelling waves. For carefully chosen redistribution kernels, one may derive the speed and approximate the shape of the observed waveforms. A model with overcompensation exhibited flip bifurcations and travelling cycles in addition to simple travelling waves. Finally, a simple predator-prey system possessed periodic wave trains and a variety of travelling waves.
authors.affiliation: Department of Applied Mathematics, University of Washington, Seattle 98195.
authors.forename: M
authors.initials: M
authors.lastname: Kot
mesh_terms: D004463:Ecology; D008433:Mathematics; D015233:Models, Statistical; D011157:Population Dynamics