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PubMed · 15996683

Food-web formation with recursive evolutionary branching.

Hiroshi C Ito·Takashi Ikegami
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Abstract

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.

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AnimalsBiodiversityBiological EvolutionBiomassComputer SimulationEcologyFood ChainModels, BiologicalModels, StatisticalPhenotypePredatory BehaviorJournal ArticleResearch Support, Non-U.S. Gov't

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Hiroshi C Ito, Takashi Ikegami. 2005-07-05. Food-web formation with recursive evolutionary branching.. https://doi.org/10.1016/j.jtbi.2005.05.003

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