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Dynamical Analysis of an Allelopathic Phytoplankton Model with Fear Effect

  • Shangming Chen [1] ; Fengde Chen [1] ; Vaibhava Srivastava [2] ; Rana D. Parshad [2]
    1. [1] Fuzhou University

      Fuzhou University

      China

    2. [2] Iowa State University

      Iowa State University

      Township of Franklin, Estados Unidos

  • Localización: Qualitative theory of dynamical systems, ISSN 1575-5460, Vol. 23, Nº 4, 2024
  • Idioma: inglés
  • DOI: 10.1007/s12346-024-01047-3
  • Enlaces
  • Resumen

    • This paper is the first to propose an allelopathic phytoplankton competition ODE model influenced by the fear effect based on natural biological phenomena. It is shown that the interplay of this fear effect and the allelopathic term cause rich dynamics in the proposed competition model, such as global stability, transcritical bifurcation, pitchfork bifurcation, and saddle-node bifurcation. We also consider the spatially explicit version of the model and prove analogous results. Numerical simulations verify the feasibility of the theoretical analysis. The results demonstrate that the primary cause of the extinction of non-toxic species is the fear of toxic species compared to toxins.

      Allelopathy only affects the density of non-toxic species. The discussion guides the conservation of species and the maintenance of biodiversity.

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