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Reaction-diffusion predator-prey-parasite system and spatiotemporal complexity

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  • Chakraborty, Bhaskar
  • Ghorai, Santu
  • Bairagi, Nandadulal

Abstract

This paper deals with the spatial pattern formation in a diffusive predator-prey-parasite (PPP) model, where predator feeds on infected prey following type II response function and infection spreads among prey species through horizontal transmission. The study is accomplished with respect to an ecological parameter that quantifies the reproductive gain of predator and two epidemiological parameters which measure the force of infection and virulence of the disease. We show analytically that the interior equilibrium loses its stability through Hopf bifurcation in the absence of diffusion if the reproductive gain of predator crosses some threshold value. In case of diffusive system, it is shown that the interior equilibrium, which is otherwise stable, may lose its stability due to diffusion. Criteria for the occurrence of various types of instability, like Turing, Hopf-Turing and pure Hopf, associated with the PPP model are presented with illustrations. Our simulation results reveal that this diffusion-driven instability creates various spatio-temporal patterns, like spot, stripe, mixture of spots & stripes and spiral patterns, depending upon the values of ecological and diffusion parameters. Turing instability and the corresponding patterns are also observed with the variation of two epidemiological parameters. Interestingly, the epidemiological parameters that measure the infection rate and virulence of the disease show opposite patterns with their increasing values.

Suggested Citation

  • Chakraborty, Bhaskar & Ghorai, Santu & Bairagi, Nandadulal, 2020. "Reaction-diffusion predator-prey-parasite system and spatiotemporal complexity," Applied Mathematics and Computation, Elsevier, vol. 386(C).
    • Handle: RePEc:eee:apmaco:v:386:y:2020:i:c:s0096300320304768
    DOI: 10.1016/j.amc.2020.125518
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    References listed on IDEAS

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    1. Ma, Zhan-Ping & Huo, Hai-Feng & Xiang, Hong, 2017. "Hopf bifurcation for a delayed predator–prey diffusion system with Dirichlet boundary condition," Applied Mathematics and Computation, Elsevier, vol. 311(C), pages 1-18.
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    Cited by:

    1. Marick, Sounov & Bhattacharya, Santanu & Bairagi, Nandadulal, 2023. "Dynamic properties of a reaction–diffusion predator–prey model with nonlinear harvesting: A linear and weakly nonlinear analysis," Chaos, Solitons & Fractals, Elsevier, vol. 175(P1).
    2. Ghorai, Santu & Chakraborty, Bhaskar & Bairagi, Nandadulal, 2021. "Preferential selection of zooplankton and emergence of spatiotemporal patterns in plankton population," Chaos, Solitons & Fractals, Elsevier, vol. 153(P1).
    3. Sarangi, B.P. & Raw, S.N., 2023. "Dynamics of a spatially explicit eco-epidemic model with double Allee effect," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 206(C), pages 241-263.
    4. Bhunia, Bidhan & Ghorai, Santu & Kar, Tapan Kumar & Biswas, Samir & Bhutia, Lakpa Thendup & Debnath, Papiya, 2023. "A study of a spatiotemporal delayed predator–prey model with prey harvesting: Constant and periodic diffusion," Chaos, Solitons & Fractals, Elsevier, vol. 175(P1).

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