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Stationary pattern of a ratio-dependent food chain model with diffusion. (English) Zbl 1210.35268
Summary: We investigate a three-species food chain model with diffusion and ratio-dependent predation functional response. We mainly focus on the coexistence of the three species. For this coupled reaction-diffusion system, we study the persistent property of the solution, the stability of the constant positive steady state solution, and the existence and nonexistence of nonconstant positive steady state solutions. Both the general stationary pattern and Turing pattern are observed as a result of diffusion. Our results also exhibit some interesting effects of diffusion and functional responses on pattern formation.

MSC:
35Q92PDEs in connection with biology and other natural sciences
92C15Developmental biology, pattern formation
92D40Ecology