中国物理B ›› 2011, Vol. 20 ›› Issue (3): 34702-034702.doi: 10.1088/1674-1056/20/3/034702

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Pattern selection in a predation model with self and cross diffusion

王玮明1, 林晔智2, 王文娟3, 谭永基3   

  1. (1)College of Mathematics and Information Science, Wenzhou University, Wenzhou 325035, China;School of Mathematical Sciences, Fudan University, Shanghai 200433, China; (2)Computer Sci-Tech Department, East China Normal University, Shanghai 200062, China; (3)School of Mathematical Sciences, Fudan University, Shanghai 200433, China
  • 收稿日期:2010-07-29 修回日期:2010-11-19 出版日期:2011-03-15 发布日期:2011-03-15
  • 基金资助:
    Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. Y7080041), and the Shanghai Postdoctoral Scientific Program, China (Grant No. 09R21410700).

Pattern selection in a predation model with self and cross diffusion

Wang Wei-Ming(王玮明)a)b)†, Wang Wen-Juan(王文娟)b), Lin Ye-Zhi(林晔智)c), and Tan Yong-Ji(谭永基) b)   

  1. a College of Mathematics and Information Science, Wenzhou University, Wenzhou 325035, Chinab School of Mathematical Sciences, Fudan University, Shanghai 200433, China; c Computer Sci-Tech Department, East China Normal University, Shanghai 200062, China
  • Received:2010-07-29 Revised:2010-11-19 Online:2011-03-15 Published:2011-03-15
  • Supported by:
    Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. Y7080041), and the Shanghai Postdoctoral Scientific Program, China (Grant No. 09R21410700).

摘要: In this paper, we present the amplitude equations for the excited modes in a cross-diffusive predator--prey model with zero-flux boundary conditions. From these equations, the stability of patterns towards uniform and inhomogenous perturbations is determined. Furthermore, we present novel numerical evidence of six typical turing patterns, and find that the model dynamics exhibits complex pattern replications: for μ1<μμ2, the steady state is the only stable solution of the model; for μ2<μμ4, by increasing the control parameter μ, the sequence Hπ-hexagons → H0-hexagon-stripe mixtures rightarrow stripes → Hπ-hexagon-stripe mixtures → H0-hexagons is observed; for μ>μ4, the stripe pattern emerges. This may enrich the pattern formation in the cross-diffusive predator--prey model.

关键词: cross-diffusion, turing instability, pattern selection, amplitude equations

Abstract: In this paper, we present the amplitude equations for the excited modes in a cross-diffusive predator--prey model with zero-flux boundary conditions. From these equations, the stability of patterns towards uniform  and inhomogenous perturbations is determined. Furthermore, we present novel numerical evidence of six typical turing patterns, and find that the model dynamics exhibits complex pattern replications: for $\mu_1<\mu\leq\mu_2$,  the steady state is the only stable solution of the model; for $\mu_2<\mu\leq\mu_4$, by increasing the control parameter $\mu$, the sequence $H_{\pi}$-hexagons $\rightarrow$ $H_{\pi}$-hexagon-stripe mixtures $\rightarrow$  stripes $\rightarrow$ $H_{0}$-hexagon-stripe mixtures $\rightarrow$ $H_{0}$-hexagons is observed; for $\mu>\mu_4$, the stripe pattern emerges. This may enrich the pattern formation in the cross-diffusive predator--prey model.

Key words: cross-diffusion, turing instability, pattern selection, amplitude equations

中图分类号:  (Pattern selection; pattern formation)

  • 47.54.-r
87.23.Cc (Population dynamics and ecological pattern formation) 89.75.Kd (Patterns)