2014/07/31 by Tim Rogers, Alan J. McKane
Biochemistry, Genetics and Molecular Biology · Medicine · Physics and Astronomy · Social Sciences · #Biological evolution #Biology #Competition (biology) #Ecology #Evolution and Genetic Dynamics #Evolutionary Game Theory and Cooperation #Evolutionary biology #Genetic Fitness #Genetics #Mathematical and Theoretical Epidemiology and Ecology Models #Offspring #Survival of the fittest #cond-mat.stat-mech #q-bio.PE
paper · pdf · doi:10.1103/physreve.92.032708
published as Phys. Rev. E 92, 032708 (2015) · 11 pages, 6 figures
openalex publication_date 2015/09/14 · arxiv created 2015/09/23 · arxiv updated 2015/09/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.