Simulation and analysis of an individual-based model for graph-structured plant dynamics

Authored by F Campillo, N Champagnat

Date Published: 2012

DOI: 10.1016/j.ecolmodel.2012.03.017

Sponsors: No sponsors listed

Platforms: No platforms listed

Model Documentation: Other Narrative Mathematical description

Model Code URLs: Model code not found

Abstract

We propose a stochastic individual-based model of graph-structured population, viewed as a simple model of clonal plants. The dynamics is modeled in continuous time and space, and focuses on the effects of the network structure of the plant on the growth strategy of ramets. This model is coupled with an explicit advection-diffusion dynamics for resources. After giving a simulation scheme of the model, the capacity of the model to reproduce specific features of clonal plants, such as their efficiency to forage resources and colonize an empty field by means of phalanx or guerrilla strategies, is numerically studied. Next, we propose a large population approximation of the model for phalanx-type populations, taking the form of an advection-diffusion partial differential equation for population densities, where the influence of the local graph structure of the plant takes the form of a nonlinear dependence in the gradient of resources. (C) 2012 Elsevier BM. All rights reserved.

Tags

Competition Dispersal growth Integration Stochastic-processes Macroscopic models Adaptive evolution Vegetative reproduction Clonal plants Locally regulated population