The dynamic complexity of a host-parasitoid model with a Beddington-DeAngelis functional response

This paper investigates the complex dynamics in a discrete-time model of predator-prey interaction with a Beddington-DeAngelis functional response. Local stability analysis of this model is carried out and many forms of complexities are observed using ecology theories and numerical simulation of the global behavior. Furthermore, the existence of a strange attractor and computation of the largest Lyapunov exponent also demonstrate the chaotic dynamic behavior of the model. The results show that the system exhibits rich complexity features such as stable, periodic and chaotic dynamics. (C) 2008 Elsevier Ltd. All rights reserved.