Key role of recombination in evolutionary processes with migration between two habitats

Saakian, David B.; Koonin, Eugene V.; Cheong, Kang Hao

doi:10.1103/physreve.100.030401

Cited by 6 publications

(2 citation statements)

References 37 publications

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“…In recent years, microbiome stability and variation have become a major problem in microbiology, with important implications for human health [28,29]. Horizontal gene transfer plays a crucial role in the preservation of genome diversity [30][31][32][33][34][35][36] but the effects of environmental variations on the microbiome composition remain poorly understood. Evolutionary processes in populations in time-varying environments can drastically differ from those in fixed environments [37][38][39][40][41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Microbial diversity and ecological complexity emerging from environmental variation and horizontal gene transfer in a simple mathematical model

Babajanyan,

Garushyants,

Wolf

et al. 2024

Preprint

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Microbiomes are generally characterized by high diversity of coexisting microbial species and strains that remains stable within a broad range of conditions. However, under fixed conditions, microbial ecology conforms with the exclusion principle under which two populations competing for the same resource within the same niche cannot coexist because the less fit population inevitably goes extinct. To explore the conditions for stabilization of microbial diversity, we developed a simple mathematical model consisting of two competing populations that could exchange a single gene allele via horizontal gene transfer (HGT). We found that, although in a fixed environment, with unbiased HGT, the system obeyed the exclusion principle, in an oscillating environment, within large regions of the phase space bounded by the rates of reproduction and HGT, the two populations coexist. Moreover, depending on the parameter combination, all three major types of symbiosis obtained, namely, pure competition, host-parasite relationship and mutualism. In each of these regimes, certain parameter combinations provided for synergy, that is, a greater total abundance of both populations compared to the abundance of the winning population in the fixed environments. These findings show that basic phenomena that are universal in microbial communities, environmental variation and HGT, provide for stabilization of microbial diversity and ecological complexity.

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Section: Introductionmentioning

confidence: 99%

Microbial diversity and ecological complexity emerging from environmental variation and horizontal gene transfer in a simple mathematical model

Babajanyan,

Garushyants,

Wolf

et al. 2024

Preprint

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“…It is known that the evolutionary processes in varying environments can drastically differ from those in a fixed environment. [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] A changing environment can induce polymorphic states that do not exist in a fixed environment. [34,37,39,41,[52][53][54][55][56][57][58] Here, we are going to discuss the selection process in well-mixed populations under a periodically varying environment.…”

Section: Introductionmentioning

confidence: 99%

Cooperate or Not Cooperate in Predictable but Periodically Varying Situations? Cooperation in Fast Oscillating Environment

2020

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In this work, the cooperation problem between two populations in a periodically varying environment is discussed. In particular, the two‐population prisoner's dilemma game with periodically oscillating payoffs is discussed, such that the time‐average of these oscillations over the period of environmental variations vanishes. The possible overlaps of these oscillations generate completely new dynamical effects that drastically change the phase space structure of the two‐population evolutionary dynamics. Due to these effects, the emergence of some level of cooperators in both populations is possible under certain conditions on the environmental variations. In the domain of stable coexistence the dynamics of cooperators in each population form stable cycles. Thus, the cooperators in each population promote the existence of cooperators in the other population. However, the survival of cooperators in both populations is not guaranteed by a large initial fraction of them.

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A review of predator–prey systems with dormancy of predators

et al. 2022

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Key role of recombination in evolutionary processes with migration between two habitats

Cited by 6 publications

References 37 publications

Microbial diversity and ecological complexity emerging from environmental variation and horizontal gene transfer in a simple mathematical model

Microbial diversity and ecological complexity emerging from environmental variation and horizontal gene transfer in a simple mathematical model

Cooperate or Not Cooperate in Predictable but Periodically Varying Situations? Cooperation in Fast Oscillating Environment

A review of predator–prey systems with dormancy of predators

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