title: Turing patterns and long-time behavior in a three-species food-chain model.
abstract: We consider a spatially explicit three-species food chain model, describing generalist top predator-specialist middle predator-prey dynamics. We investigate the long-time dynamics of the model and show the existence of a finite dimensional global attractor in the product space, L(2)(Ω). We perform linear stability analysis and show that the model exhibits the phenomenon of Turing instability, as well as diffusion induced chaos. Various Turing patterns such as stripe patterns, mesh patterns, spot patterns, labyrinth patterns and weaving patterns are obtained, via numerical simulations in 1d as well as in 2d. The Turing and non-Turing space, in terms of model parameters, is also explored. Finally, we use methods from nonlinear time series analysis to reconstruct a low dimensional chaotic attractor of the model, and estimate its fractal dimension. This provides a lower bound, for the fractal dimension of the attractor, of the spatially explicit model.
authors: Department of Mathematics, Clarkson University, Potsdam, NY 13699, USA.
authors: Rana D
authors: RD
authors: Parshad
authors: Department of Mathematics, Clarkson University, Potsdam, NY 13699, USA; School of Basic Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175001, India. Electronic address: nkumari@clarkson.edu.
authors: Nitu
authors: N
authors: Kumari
authors: Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
authors: Aslan R
authors: AR
authors: Kasimov
authors: Computer, Electrical and Mathematical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.
authors: Hamid Ait
authors: HA
authors: Abderrahmane
mesh_terms: D000818:Animals; D003198:Computer Simulation; D020387:Food Chain; D017709:Fractals; D008962:Models, Theoretical; D011157:Population Dynamics; D011235:Predatory Behavior
keywords: Diffusion induced chaos; Global attractor; Nonlinear time series analysis; Three-species food chain; Turing instability