Food-web formation with recursive evolutionary branching

被引：33
|
作者：
Ito, HC [1 ]
Ikegami, T [1 ]
机构：
[1] Univ Tokyo, Grad Sch Arts & Sci, Meguro Ku, Tokyo 1538902, Japan
来源：
JOURNAL OF THEORETICAL BIOLOGY | 2006年 / 238卷 / 01期
基金：
日本学术振兴会;
关键词：
food-web; evolutionary dynamics; predator-prey model; evolutionary branching; reaction-diffusion model;
D O I：
10.1016/j.jtbi.2005.05.003
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
A reaction-diffusion model describing the evolutionary dynamics of a food-web was constructed. In this model, predator-prey relationships among organisms were determined by their position in a two-dimensional phenotype space defined by two traits: as prey and as predator. The mutation process is expressed with a diffusion process of biomass in the phenotype space. Numerical simulation of this model showed co-evolutionary dynamics of isolated phenotypic clusters, including various types of evolutionary branching, which were classified into branching as prey, branching as predators, and co-evolutionary branching of both prey and predators. A complex food-web develops with recursive evolutionary branching from a single phenotypic cluster. Biodiversity peaks at the medium strength of the predator-prey interaction, where the food-web is maintained at medium biomass by a balanced frequency between evolutionary branching and extinction. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：1 / 10
页数：10
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