Turing patterns in a simple model of a nutrient-microorganism system in the sediment

被引：19

作者：

Baurmann, M

Feudel, U

机构：

[1] ICBM, Carl Von Ossietzky Universität, PF 2503

来源：

ECOLOGICAL COMPLEXITY | 2004年 / 1卷 / 01期

关键词：

Pattern formation; Reaction-diffusion models; Sediment; Turing instability;

D O I：

10.1016/j.ecocom.2004.01.001

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Sediments are characterized by heterogeneous distributions of nutrients and microorganisms which emerge as a result of the interaction between chemical and biological processes with physical transport. We study in a simplified model the dynamics of one population of microorganisms and its nutrient, taking into account that the considered bacteria possess an active as well as an inactive state. Furthermore, the nutrients are transported by bioirrigation. It is shown that under certain conditions Turing patterns can occur which yield heterogeneous vertical spatial distributions of species. Furthermore, this model exhibits several stable coexisting spatial profiles, so that it depends crucially on the initial condition which of the distributions will be realized. This phenomenon of multistability can still be observed when spatial profiles are externally imposed by considering a depth-dependent bioirrigation. (c) 2004 Elsevier B.V All rights reserved.

引用

页码：77 / 94

页数：18

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