Complex pattern formation driven by the interaction of stable fronts in a competition-diffusion system
Complex pattern formation driven by the interaction of stable fronts in a competition-diffusion system
复制标题
竞争扩散系统中稳定前沿相互作用驱动的复杂格局形成
DOI:
10.1007/s00285-019-01370-3
复制
发表时间:
2019
影响因子:
1.9
通讯作者:
Masayasu Mimura
中科院分区:
文献类型:
--
作者:
Lorenzo Contento;Masayasu Mimura
The ecological invasion problem in which a weaker exotic species invades an ecosystem inhabited by two strongly competing native species is modelled by a three-species competition-diffusion system. It is known that for a certain range of parameter values competitor-mediated coexistence occurs and complex spatio-temporal patterns are observed in two spatial dimensions. In this paper we uncover the mechanism which generates such patterns. Under some assumptions on the parameters the three-species competition-diffusion system admits two planarly stable travelling waves. Their interaction in one spatial dimension may result in either reflection or merging into a single homoclinic wave, depending on the strength of the invading species. This transition can be understood by studying the bifurcation structure of the homoclinic wave. In particular, a time-periodic homoclinic wave (breathing wave) is born from a Hopf bifurcation and its unstable branch acts as a separator between the reflection and merging regimes. The same transition occurs in two spatial dimensions: the stable regular spiral associated to the homoclinic wave destabilizes, giving rise first to an oscillating breathing spiral and then breaking up producing a dynamic pattern characterized by many spiral cores. We find that these complex patterns are generated by the interaction of two planarly stable travelling waves, in contrast with many other well known cases of pattern formation where planar instability plays a central role.
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DOI:
10.1103/physreve.71.066209
发表时间:
2004
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
V. Sánchez;V. Espinosa;I. Pérez;Fernando Silva;G. D. de Valcárcel;E. Roldán
通讯作者:
E. Roldán
DOI:
10.1103/physreve.48.705
发表时间:
1993
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
作者:
A. Hagberg;E. Meron
通讯作者:
E. Meron
影响因子:
8.6
作者:
B. Marts;A. Hagberg;E. Meron;Anna L. Lin
通讯作者:
Anna L. Lin
影响因子:
4.4
作者:
Pushpita Ghosh;D. Ray
通讯作者:
D. Ray
影响因子:
1.7
作者:
HAGBERG, A;MERON, E
通讯作者:
MERON, E