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Dynamical behavior for a Lotka-Volterra weak competition system in advective homogeneous environment

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    * Corresponding author

The author is supported by NSF grant 11801089, Postdoctoral Science Foundation of China(N0.2018M643281)

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  • We consider a two-species Lotka-Volterra weak competition model in a one-dimensional advective homogeneous environment, where individuals are exposed to unidirectional flow. It is assumed that two species have the same population dynamics but different diffusion rates, advection rates and intensities of competition. We study the following useful scenarios: (1) if one species disperses by random diffusion only and the other assumes both random and unidirectional movements, two species will coexist; (2) if two species are drifting along the different direction, two species will coexist; (3) if the intensities of inter-specific competition are small enough, two species will coexist; (4) if the intensities of inter-specific competition are close to 1, the competitive exclusion principle holds. These results provide a new mechanism for the coexistence of competing species. Finally, we apply a perturbation argument to illustrate that two species will converge to the unique coexistence steady state.

    Mathematics Subject Classification: Primary: 35K57, 35B32; Secondary: 92D25.

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