Food-web formation with recursive evolutionary branching

Ito, Hiroshi C.; Ikegami, Takashi

doi:10.1016/j.jtbi.2005.05.003

Cited by 39 publications

(49 citation statements)

References 31 publications

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“…In previous theoretical studies, the evolutionary development of food-webs have been analyzed mainly by numerical simulation (Caldarelli et al 1998;Yoshida 2003;Drossel et al 2004;Loeuille and Loreau 2005;Ito and Ikegami 2006). Analytical insights into such dynamics are important for understanding the mechanisms and constraints underlying food-web development.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the difference, they have successfully demonstrated the coevolutionary formation of food-webs using numerical simulation. Ito and Ikegami (2006) has shown that foodwebs develop with repeated evolutionary branching.…”

Section: H C Ito (And) á M Shimada á T Ikegamimentioning

confidence: 99%

“…In this paper, we will construct a similar food-web model to Ito and Ikegami (2006), assuming a two-dimensional phenotype space, and analytically investigating how evolutionary diversification can be repeated and how complex food-webs may develop. The obtained predictions are examined by numerical simulation.…”

Section: H C Ito (And) á M Shimada á T Ikegamimentioning

confidence: 99%

“…Following Ito and Ikegami (2006), we define the prey strategy of phenotype s as a resource distribution in a ''resource space,'' z, provided by a unit biomass of the phenotype, i.e., a ''resource pattern'': r(z, s). The resource space has arbitrary dimensions, and its axes may be body size, activity time, habitat, nutrient composition, hardness, toxicity, etc.…”

Section: Functional Responsementioning

confidence: 99%

“…Recently, several models for the evolutionary development of food-webs were developed (Caldarelli et al 1998;Yoshida 2003;Drossel et al 2004;Loeuille and Loreau 2005;Ito and Ikegami 2006). They differ from each other in their definition of the traits that determine predator-prey Electronic supplementary material The online version of this article doi:(10.1007/s10144-008-0113-5) contains supplementary material, which is available to authorized users.…”

Section: Introductionmentioning

confidence: 99%

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Coevolutionary dynamics of adaptive radiation for food‐web development

2008

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To investigate how complex food-webs can develop through repeated evolutionary diversification, a predator-prey model was analyzed. In the model, each individual has two traits: trait x as a predator and trait y as a prey. These traits constitute a two-dimensional phenotype space, in which the whole group of individuals are represented as a phenotype distribution. Predator-prey interactions among the phenotypes are determined by their relative positions in the phenotype space. Each phenotypic cluster was treated as a species. Each species evolves in y to escape from predation, while it evolves in x to chase their prey. Analytical investigation provided two predictions. First, coupled evolutionary diversifications of y and x may occur when the x of predators have caught up with their prey's y, which may be repeated. Second, complex food-webs may develop when species' competitive strengths are kept similar within the communities. If the functional response is close to the ratio-dependent response, the competitive strengths of all species are similar when the relationship between predators and prey corresponds to the ideal free distribution (IFD). These predictions were confirmed by numerical simulations.

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