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Analysis of the Dynamics Induced by a Competition Index in a Heterogeneous Population of Plants: from an Individual-based Model to a Macroscopic Model by Della Noce, Antonin; Cournède, Paul-Henry is a scholarly article available to read on EtoBox.

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Competition indices are models frequently used in ecology to account for the impact of density and resource distribution on the growth of a plant population. They allow to define simple individual-based models, by integrating information relatively easy to collect at the population scale, which are generalized to a macroscopic scale by mean-field limit arguments. Nevertheless, up to our knowledge, few works have studied under which conditions on the competition index or on the initial configuration of the population the passage from the individual scale to the population scale is mathematically guaranteed. We consider in this paper a competition index commonly used in the literature, expressed as an average over the population of a pairwise potential depending on a measure of plants' sizes and their respective distances. In line with the literature on mixed-effect models, the population is assumed to be heterogeneous, with inter-individual variability of growth parameters. Sufficient conditions on the initial configuration are given so that the population dynamics, taking the form of a system of non-linear differential equations, is well defined. The mean-field distribution associa

Author

Della Noce, Antonin; Cournède, Paul-Henry

Published

2022

Language

EN