Abstract
This paper considers two-species competitive systems with one-species’ diffusion between patches. Each species can persist alone in the corresponding patch (a source), while the mobile species cannot survive in the other (a sink). Using the method of monotone dynamical systems, we give a rigorous analysis on persistence of the system, prove local/global stability of the equilibria and show new types of bi-stability. These results demonstrate that diffusion could lead to results reversing those without diffusion, which extend the principle of competitive exclusion: Diffusion could lead to persistence of the mobile competitor in the sink, make it reach total abundance larger than if non-diffusing and even exclude the opponent. The total abundance is shown to be a distorted function (surface) of diffusion rates, which extends both previous theory and experimental observations. A novel strategy of diffusion is deduced in which the mobile competitor could drive the opponent into extinction, and then approach the maximal abundance. Initial population density and diffusive asymmetry play a role in the competition. Our work has potential applications in biodiversity conservation and economic competition.
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Acknowledgements
We would like to thank two anonymous reviewers for their careful reading and helpful comments on the manuscript. This work was supported by NSF of P.R. China (12071495, 11571382).
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Wu, H., Wang, Y. Dynamics of Competitive Systems with Diffusion Between Source–Sink Patches. Bull Math Biol 83, 49 (2021). https://doi.org/10.1007/s11538-021-00885-5
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DOI: https://doi.org/10.1007/s11538-021-00885-5