A stage-structured delayed reaction-diffusion model for competition between two species.

Delayed reaction-diffusion system;Integral system;Stage-structure;Traveling wave solutions;Global stability;Lotka-Volterra competition

Chunwei Wang

University:University of Louisville

Department:Mathematics

关键词: Delayed reaction-diffusion system;    Integral system;    Stage-structure;    Traveling wave solutions;    Global stability;    Lotka-Volterra competition;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=2520&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

We formulate a delayed reaction-diffusion model that describes competition between two species in a stream. We divide each species into two compartments, individuals inhabiting on the benthos and individuals drifting in the stream. Time delays are incorporated to measure the time lengths from birth to maturity of the benthic populations. We assume that the growth of population takes place on the benthos and that dispersal occurs in the stream. Our system consists of two linear reaction-diffusion equations and two delayed ordinary differential equations. We study the dynamics of the non-spatial model, determine the existence and global stability of the equilibria, and provide conditions under which solutions converge to the equilibria. We show that the existence of traveling wave solutions can be established through compact integral operators. We define two real numbers and prove that they serve as the lower bounds of the speeds of traveling wave solutions in the system.