2020/02/18 by M. M. Tehrani, Mostafa Mazaheri Tehrani, Tehrani, M. M. +2
Biochemistry, Genetics and Molecular Biology · Mathematics · Medicine · Physics and Astronomy · Social Sciences · #Biology #Chaotic #Competition (biology) #Demography #Ecology #Econometrics #Economics #Evolutionary Game Theory and Cooperation #Extinction (optical mineralogy) #FOS: Biological sciences #Growth rate #Mathematical and Theoretical Epidemiology and Ecology Models #Mathematics #Opinion Dynamics and Social Influence #Physics #Population #Population growth #Population size #Populations and Evolution (q-bio.PE) #Quantitative Methods (q-bio.QM) #Statistics #q-bio.PE #q-bio.QM
paper · pdf · doi:10.48550/arxiv.2002.07307
published in arXiv (Cornell University) (Cornell University) · 19 pages, 7 figures
arxiv created 2020/02/18 · openalex publication_date 2020/02/18 · arxiv updated 2020/02/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Population dynamics of a competitive two-species system under the influence of random events are analyzed and expressions for the steady-state population mean, fluctuations, and cross-correlation of the two species are presented. It is shown that random events cause the population mean of each specie to make smooth transition from far above to far below of its growth rate threshold. At the same time, the population mean of the weaker specie never reaches the extinction point. It is also shown that, as a result of competition, the relative population fluctuations do not die out as the growth rates of both species are raised far above their respective thresholds. This behavior is most remarkable at the maximum competition point where the weaker specie's population statistics becomes completely chaotic regardless of how far its growth rate in raised.