Emergence of spatiotemporal chaos driven by far-field breakup of spiral waves in the plankton ecological systems

Details Emergence of spatiotemporal chaos driven by far-field breakup of spiral waves in the plankton ecological systems Emergence of spatiotemporal chaos driven by far-field breakup of spiral waves in the plankton ecological systems

2007-04-03

arxiv.org/abs/0704.0322v3

2009 Chinese Phys. B 18 506-515

Nonlinear Sciences

Pattern Formation and Solitons

9 Figures and 11 pages, REVTeX 4

Scientific paper

10.1088/1674-1056/18/2/021

Alexander B. Medvinsky \emph{et al} [A. B. Medvinsky, I. A. Tikhonova, R. R. Aliev, B.-L. Li, Z.-S. Lin, and H. Malchow, Phys. Rev. E \textbf{64}, 021915 (2001)] and Marcus R. Garvie \emph{et al} [M. R. Garvie and C. Trenchea, SIAM J. Control. Optim. \textbf{46}, 775-791 (2007)] shown that the minimal spatially extended reaction-diffusion model of phytoplankton-zooplankton can exhibit both regular, chaotic behavior, and spatiotemporal patterns in a patchy environment. Based on that, the spatial plankton model is furtherly investigated by means of computer simulations and theoretical analysis in the present paper when its parameters would be expected in the case of mixed Turing-Hopf bifurcation region. Our results show that the spiral waves exist in that region and the spatiotemporal chaos emerge, which arise from the far-field breakup of the spiral waves over large ranges of diffusion coefficients of phytoplankton and zooplankton. Moreover, the spatiotemporal chaos arising from the far-field breakup of spiral waves does not gradually involve the whole space within that region. Our results are confirmed by means of computation spectra and nonlinear bifurcation of wave trains. Finally, we give some explanations about the spatially structured patterns from the community level.

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