Stable trimorphic coexistence in a lattice model of spatial competition with two site types
Authored by Ilmari Karonen
Date Published: 2012
DOI: 10.1016/j.jtbi.2011.10.022
Sponsors:
Finnish Graduate School in Computational Sciences (FICS)
Platforms:
C
Model Documentation:
Other Narrative
Mathematical description
Model Code URLs:
Model code not found
Abstract
I examine the effect of exogenous spatial heterogeneity on the
coexistence of competing species using a simple model of
non-hierarchical competition for site occupancy on a lattice. The sites
on the lattice are divided into two types representing two different
habitats or spatial resources. The model features no temporal
variability, hierarchical competition, type-dependent interactions or
other features traditionally known to support more competing species
than there are resources. Nonetheless, stable coexistence of two habitat
specialists and a generalist is observed in this model for a range of
parameter values. In the spatially implicit mean field approximation of
the model, such coexistence is shown to be impossible, demonstrating
that it indeed arises from the explicit spatial structure. (C) 2011
Elsevier Ltd. All rights reserved.
Tags
Biodiversity
Dispersal
population
Exclusion