Related Experiment Video
Updated: Aug 3, 2026

06:45
Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
Published on: January 18, 2014
Coevolution of species in competition: a theoretical study
Summary
This study introduces a coevolution model for competing species, revealing a principle of maximized function during evolution. This helps understand resource competition and ecological character displacement.
Area of Science:
- Evolutionary Biology
- Ecological Modeling
- Population Genetics
Background:
- Species competition is a key driver of evolution.
- Genetic variability within species influences competitive dynamics.
- Understanding resource utilization is crucial for ecological studies.
Purpose of the Study:
- To model the coevolution of competing species with genetic variability.
- To identify a principle governing coevolutionary dynamics.
- To examine the evolution of ecological character displacement in resource competition.
Main Methods:
- Developed a mathematical model for coevolution.
- Incorporated genetic variability at a single locus per species.
- Identified and utilized a function maximized during coevolution.
Main Results:
- A function that is maximized during coevolution was identified.
- The model predicts outcomes of competition for a single resource.
- Conditions favoring the evolution of ecological character displacement were analyzed.
Conclusions:
- Coevolutionary dynamics can be understood through a maximization principle.
- Resource competition shapes species' utilization functions.
- Genetic variability plays a role in the evolution of distinct resource use (character displacement).
Related Concept Videos
Speciation Rates
Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.
Ecological Niches
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.Multiple species cannot occupy the exact same niche within their habitat. If the niches of two or more species overlap to a large extent, the competitive exclusion principle dictates that one species will outcompete the other, forcing it to...
Competition
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...
Limits to Natural Selection
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
Genetics of Speciation
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...
Microbial Interactions: Competition
Microbial competition is an ecological interaction in which microorganisms vie for limited resources within shared environments. These resources may include nutrients, space, or light, depending on the system. The intensity and outcome of competition are influenced by the environmental context, such as nutrient availability, spatial constraints, and the diversity of microbial species present. These competitive interactions significantly influence the structure, function, and resilience of...

