The evolutionary limit for models of populations interacting competitively via several resources (original) (raw)

2011, Journal of Differential Equations

Abstract

We consider a integro-differential nonlinear model that describes the evolution of a population structured by a quantitative trait. The interactions between traits occur from competition for resources whose concentrations depend on the current state of the population. Following the formalism of [15], we study a concentration phenomenon arising in the limit of strong selection and small mutations. We prove that the population density converges to a sum of Dirac masses characterized by the solution ϕ of a Hamilton-Jacobi equation which depends on resource concentrations that we fully characterize in terms of the function ϕ.

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