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Related Experiment Video

Updated: May 11, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Coexistence in an inhomogeneous environment.

Shlomit Weisman¹, David A Kessler

¹Department of Physics, Bar-Ilan University, Ramat-Gan, Israel.

|May 25, 2013

Summary

This summary is machine-generated.

In two dimensions, species competition can lead to coexistence at intermediate densities, a novel finding not seen in 1D models. Geometry significantly impacts species dispersal and survival outcomes.

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Last Updated: May 11, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

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Published on: March 13, 2014

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

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Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Published on: October 29, 2016

Area of Science:

Ecology
Population Dynamics
Theoretical Biology

Background:

Ecological models often simplify species interactions and spatial dynamics.
Previous models like Kessler-Sander and Hamilton-May explored species competition with dispersal costs.
Spatial inhomogeneity in reproduction rates can create implicit costs for dispersal.

Purpose of the Study:

To investigate the two-dimensional extension of the Kessler-Sander model for interspecies competition.
To analyze the impact of dispersal rates on species coexistence and extinction dynamics in a 2D environment.
To identify novel phenomena arising from geometric considerations in ecological models.

Main Methods:

Examined a two-dimensional model of competition between two species with differing dispersal rates.
Incorporated spatial inhomogeneity of reproduction rates, leading to an implicit cost of dispersal.
Analyzed the trade-off between dispersal costs and the benefits of dispersal in regulating population fluctuations.

Main Results:

In two dimensions, species competition results in the elimination of one species at high and low population densities.
A novel phenomenon of indefinite species coexistence was observed at intermediate population densities in 2D.
This coexistence is absent in the one-dimensional Kessler-Sander model and the fully connected Hamilton-May model.

Conclusions:

The geometric dimensionality of an environment plays a crucial role in species dispersal and coexistence.
Two-dimensional spatial structure can facilitate species coexistence where one-dimensional models predict extinction.
This study highlights the importance of spatial geometry in understanding ecological competition and population dynamics.