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
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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