Environmental Stochasticity and the Speed of Evolution

Matan Danino; David A. Kessler; Nadav M. Shnerb

doi:https://doi.org/10.1007/s10955-018-1990-4

Environmental Stochasticity and the Speed of Evolution

Matan Danino, David A. Kessler, Nadav M. Shnerb

Department of Physics

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

Abstract

Biological populations are subject to two types of noise: demographic stochasticity due to fluctuations in the reproductive success of individuals, and environmental variations that affect coherently the relative fitness of entire populations. The rate in which the average fitness of a community increases has been considered so far using models with pure demographic stochasticity; here we present some theoretical considerations and numerical results for the general case where environmental variations are taken into account. When the competition is pairwise, fitness fluctuations are shown to reduce the speed of evolution, while under global competition the speed increases due to environmental stochasticity.

Original language	English
Pages (from-to)	126-142
Number of pages	17
Journal	Journal of Statistical Physics
Volume	172
Issue number	1
Early online date	2 Mar 2018
DOIs	https://doi.org/10.1007/s10955-018-1990-4
State	Published - 1 Jul 2018

Keywords

Demographic stochasticity
Environmental stochasticity
Fixation probability
Population genetics
Speed of evolution

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Mathematical Physics

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N2 - Biological populations are subject to two types of noise: demographic stochasticity due to fluctuations in the reproductive success of individuals, and environmental variations that affect coherently the relative fitness of entire populations. The rate in which the average fitness of a community increases has been considered so far using models with pure demographic stochasticity; here we present some theoretical considerations and numerical results for the general case where environmental variations are taken into account. When the competition is pairwise, fitness fluctuations are shown to reduce the speed of evolution, while under global competition the speed increases due to environmental stochasticity.

AB - Biological populations are subject to two types of noise: demographic stochasticity due to fluctuations in the reproductive success of individuals, and environmental variations that affect coherently the relative fitness of entire populations. The rate in which the average fitness of a community increases has been considered so far using models with pure demographic stochasticity; here we present some theoretical considerations and numerical results for the general case where environmental variations are taken into account. When the competition is pairwise, fitness fluctuations are shown to reduce the speed of evolution, while under global competition the speed increases due to environmental stochasticity.

KW - Demographic stochasticity

KW - Environmental stochasticity

KW - Fixation probability

KW - Population genetics

KW - Speed of evolution

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M3 - مقالة

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EP - 142

JO - Journal of Statistical Physics

JF - Journal of Statistical Physics

IS - 1

ER -

Environmental Stochasticity and the Speed of Evolution

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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