Modes of competition and the fitness of evolved populations
arXiv:1407.3137 · doi:10.1103/PhysRevE.92.032708
Abstract
Competition between individuals drives the evolution of whole species. Although the fittest individuals survive the longest and produce the most offspring, in some circumstances the resulting species may not be optimally fit. Here, using theoretical analysis and stochastic simulations of a simple model ecology, we show how the mode of competition can profoundly affect the fitness of evolved species. When individuals compete directly with one another, the adaptive dynamics framework provides accurate predictions for the number and distribution of species, which occupy positions of maximal fitness. By contrast, if competition is mediated by the consumption of a common resource then demographic noise leads to the stabilization of species with near minimal fitness.
11 pages, 6 figures
References in corpus (6)
- Noise-Induced Bistable States and Their Mean Switching Time in Foraging Colonies
- Demographic noise can lead to the spontaneous formation of species
- Age-structured Trait Substitution Sequence Process and Canonical Equation
- Spontaneous genetic clustering in populations of competing organisms
- Symmetric competition as a general model for single-species adaptive dynamics
- Evolutionary branching in a stochastic population model with discrete mutational steps