Special Session 16: The recent progress on qualitative theory of dynamical systems

Bifurcation and Chaotic Dynamics in Predator-Prey Ecological Models
Kunlun Huang
Beihang University
Peoples Rep of China
Co-Author(s):    Kunlun Huang, Xintian Jia, Yanqi Zhang, Ya li, Cuiping Li
Abstract:
We study a discrete-time predator-prey system with strong Allee effect derived by the Euler discretization. Stability analysis shows that exceeding a critical predator mortality rate generates two interior equilibria and enables species coexistence. The system undergoes fold, flip, and Neimark-Sacker bifurcations with parameter variations. The strong Allee effect stabilizes the system, while weak Allee effect, high predator growth rate, and intensified environmental protection tend to induce periodic orbits and chaotic attractors, verified by Lyapunov exponents and numerical simulations.