Effect of introducing a competitor on cyclic dominance of sockeye salmon
| Autor: | Eddy C. Carmack, Barbara Drossel, Christian Guill, Christoph K. Schmitt |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Statistics and Probability
Competitive Behavior Food Chain Biological clock Population Dynamics Population Biology Models Biological General Biochemistry Genetics and Molecular Biology Food chain Species Specificity Biological Clocks Salmon Animals Dominance (ecology) Computer Simulation education education.field_of_study General Immunology and Microbiology Ecology Applied Mathematics Population size A diamond General Medicine Brood Competitive behavior Modeling and Simulation General Agricultural and Biological Sciences |
| Zdroj: | Journal of Theoretical Biology. 360:13-20 |
| ISSN: | 0022-5193 |
| Popis: | We study the effects of introducing a competing species into a 3-species model for the population dynamics of sockeye salmon, thereby converting a food chain into a diamond module. We find that this often leads to the disappearance of the 4-year oscillation of sockeye salmon known as cyclic dominance when parameters are chosen such that all four species can coexist. Only when the population size of the competitor is small the phenomenon of cyclic dominance can persist. There is also a large region of parameter space where either the sockeye salmon or the competitor goes extinct. We discuss how these findings can be reconciled with the prevalence of cyclic dominance in many sockeye brood lakes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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