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When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.Intraspecific competition, which occurs between individuals of the same species, serves as a natural mechanism for regulating population size. Too much...

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Related Experiment Video

Updated: Jul 14, 2026

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Published on: October 29, 2016

Mother-offspring competition promotes colonization success.

J Cote¹, J Clobert, P S Fitze

¹Laboratoire Fonctionnement et Evolution des Systèmes Ecologiques, Université Pierre et Marie Curie, 7, quai Saint-Bernard, 75005 Paris, France. jcote@snv.jussieu.fr

Proceedings of the National Academy of Sciences of the United States of America

|May 25, 2007

Summary

Kin competition, particularly between mothers and offspring, significantly boosts colonization success in species like the common lizard. This kin-induced dispersal enhances survival and growth, halving extinction risk for new populations.

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Area of Science:

Ecology
Evolutionary Biology
Behavioral Ecology

Background:

Colonization is fundamental to species range expansions, biological invasions, and metapopulation dynamics.
The traits of individuals that successfully colonize new habitats remain poorly understood.
Kin-based interactions, including kin competition, can influence dispersal phenotypes and subsequent colonization ability.

Purpose of the Study:

To investigate the impact of kin competition on dispersal and colonization success in the common lizard (Lacerta vivipara).
To determine if mother-offspring competition influences the phenotype and success of colonizing individuals.

Main Methods:

A multipopulation experiment was conducted using the common lizard.
Mother-offspring interactions, a key component of kin competition, were manipulated at family and population levels.
Colonization success, including colonization rate, growth, and survival of colonizers, was measured.

Main Results:

Population-level mother-offspring competition significantly affected colonization success.
Increased competition enhanced the colonization rate of larger juveniles.
Competition also improved the growth and survival rates of individuals in newly colonized habitats.

Conclusions:

Kin competition, especially at the population level, promotes successful colonization by favoring specific phenotypes.
Kin-induced colonization can substantially reduce the extinction probability of nascent populations.
Understanding kin-based dispersal is crucial for predicting invasion dynamics and metapopulation functioning in response to environmental change.