Complex dynamics of Hastings–Powell model with additive Allee effect and Crowley–Martin functional response

Tiantian Zhao and Xiaoling Han

Chaos, Solitons & Fractals, 2025, vol. 198, issue C

Abstract: This paper focuses on a three-trophic-level food chain model involving species mutual interference, characterized by the Crowley–Martin functional response and incorporating the Allee effect for the prey species. In addition to establishing the existence of ecologically feasible equilibria, we comprehensively analyze the positivity, boundedness, dissipativeness, and permanence of the proposed model system. The global stability of the system at the coexistence equilibrium is duly validated through a suitably constructed Lyapunov function. We also establish adequate criteria for detecting local bifurcations. Sotomayor’s theorem implies the presence of saddle–node and transcritical bifurcations. Using center manifold theory and the Hopf bifurcation theorem, we investigate the emergence and stability of limit cycles via Hopf bifurcation. Finally, numerical simulations are conducted to further analyze the effects of prey refuge, intraspecific competition and the Allee effect on population dynamics.

Keywords: Predator–prey system; Additive Allee effect; Center manifold theorem; Bifurcation; Chaos (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:198:y:2025:i:c:s0960077925004448

DOI: 10.1016/j.chaos.2025.116431

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