Document Detail

Food-web formation with recursive evolutionary branching.
MedLine Citation:
PMID:  15996683     Owner:  NLM     Status:  MEDLINE    
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.
Hiroshi C Ito; Takashi Ikegami
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-07-05
Journal Detail:
Title:  Journal of theoretical biology     Volume:  238     ISSN:  0022-5193     ISO Abbreviation:  J. Theor. Biol.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2005-12-05     Completed Date:  2006-05-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376342     Medline TA:  J Theor Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1-10     Citation Subset:  IM    
The Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
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MeSH Terms
Computer Simulation*
Food Chain*
Models, Biological
Models, Statistical*
Predatory Behavior*

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