Spatiotemporal dynamics in a spatial plankton system

Details Spatiotemporal dynamics in a spatial plankton system Spatiotemporal dynamics in a spatial plankton system

2011-03-17

arxiv.org/abs/1103.3344v1

Math. Model. Nat. Phenom. Vol. 5, No. 5, 2010, pp. 101-121

Nonlinear Sciences

Pattern Formation and Solitons

Published Paper

Scientific paper

10.1051/mmnp/20105507

In this paper, we investigate the complex dynamics of a spatial plankton-fish system with Holling type III functional responses. We have carried out the analytical study for both one and two dimensional system in details and found out a condition for diffusive instability of a locally stable equilibrium. Furthermore, we present a theoretical analysis of processes of pattern formation that involves organism distribution and their interaction of spatially distributed population with local diffusion. The results of numerical simulations reveal that, on increasing the value of the fish predation rates, the sequences spots $\rightarrow$ spot-stripe mixtures$\rightarrow$ stripes$\rightarrow$ hole-stripe mixtures holes$\rightarrow$ wave pattern is observed. Our study shows that the spatially extended model system has not only more complex dynamic patterns in the space, but also has spiral waves.

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