Preemptive spatial competition under a reproduction–mortality constraint
| Autor: | Gyorgy Korniss, Andrew J. Allstadt, Thomas Caraco |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Statistics and Probability
Competitive Behavior media_common.quotation_subject Population Biology Models Biological General Biochemistry Genetics and Molecular Biology Competition (biology) Pleiotropy Statistics Animals Mortality Selection Genetic education Selection (genetic algorithm) media_common education.field_of_study Models Statistical Ecology General Immunology and Microbiology Resistance (ecology) Reproduction Applied Mathematics Mortality rate General Medicine Constraint (information theory) Phenotype Standardized mortality ratio Modeling and Simulation General Agricultural and Biological Sciences |
| Zdroj: | Journal of Theoretical Biology. 258:537-549 |
| ISSN: | 0022-5193 |
| DOI: | 10.1016/j.jtbi.2009.02.012 |
| Popis: | Spatially structured ecological interactions can shape selection pressures experienced by a population's different phenotypes. We study spatial competition between phenotypes subject to antagonistic pleiotropy between reproductive effort and mortality rate. The constraint we invoke reflects a previous life-history analysis; the implied dependence indicates that although propagation and mortality rates both vary, their ratio is fixed. We develop a stochastic invasion approximation predicting that phenotypes with higher propagation rates will invade an empty environment (no biotic resistance) faster, despite their higher mortality rate. However, once population density approaches demographic equilibrium, phenotypes with lower mortality are favored, despite their lower propagation rate. We conducted a set of pairwise invasion analyses by simulating an individual-based model of preemptive competition. In each case, the phenotype with the lowest mortality rate and (via antagonistic pleiotropy) the lowest propagation rate qualified as evolutionarily stable among strategies simulated. This result, for a fixed propagation to mortality ratio, suggests that a selective response to spatial competition can extend the time scale of the population's dynamics, which in turn decelerates phenotypic evolution. |
| Databáze: | OpenAIRE |
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