Impact of the strong Allee effect in a predator-prey model

AIMS Mathematics

article

Yudan Ma¹  Ming Zhao¹  Yunfei Du² 

[1] School of Science, China University of Geosciences;School of Basic Education, Beijing Institute of Graphic Communication

关键词: predator-prey model;    Allee effect;    transcritical bifurcation;    Hopf-bifurcation;   

DOI  :  10.3934/math.2022890

学科分类：地球科学(综合)

来源: AIMS Press

【 摘 要 】

In this work, we propose and investigate a new predator-prey model with strong Allee effect in prey and Holling type Ⅱ functional response in predator. By performing a comprehensive dynamical analysis, we first derive the existence and stability of all the possible equilibria of the system and the system undergoes two transcritical bifurcations and one Hopf-bifurcation. Next, we have calculated the first Lyapunov coefficient and find the Hopf-bifurcation in this model is supercritical and a stable limit cycle is born. Then, by comparing the properties of the system with and without Allee effect, we show that the strong Allee effect is of great importance to the dynamics. It can drive the system to instability. Specifically, Allee effect can increase the extinction risk of populations and has the ability to switch the system's stability to limit cycle oscillation from stable node. Moreover, numerical simulations are presented to prove the validity of our findings.

【 授权许可】

CC BY