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Related Experiment Video

Updated: Nov 10, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

Evolutionary bet-hedging in structured populations.

Christopher E Overton^1,2, Kieran J Sharkey³

¹University of Liverpool, Liverpool, UK. c.overton@liverpool.ac.uk.

Journal of Mathematical Biology

|April 2, 2021

Summary

This summary is machine-generated.

Bet-hedging, an evolutionary adaptation, helps species survive environmental changes. New research shows that even small population structures significantly impact bet-hedging against within-generational variation, challenging previous assumptions.

Keywords:

Evolution Evolutionary graph theory Fitness variance Networks Stochastic process

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Area of Science:

Evolutionary biology
Ecology
Population genetics

Background:

Species face extinction due to environmental fluctuations.
Bet-hedging is an evolutionary adaptation to reduce extinction risk.
Environmental variation occurs within or between generations.

Purpose of the Study:

To investigate the impact of population structure on bet-hedging against within-generational environmental variation.
To challenge the assumption that bet-hedging against within-generational variation is negligible in large populations.

Main Methods:

Utilized the framework of evolutionary graph theory.
Incorporated competition structure into population models.
Analyzed the evolutionary process under varying population structures.

Main Results:

Within-generational variation significantly impacts the evolutionary process in structured populations of any size.
Population structure, not just size, is crucial for bet-hedging dynamics.
Findings align with ecological observations contradicting established theory.

Conclusions:

Bet-hedging against within-generational variation is significant in structured populations.
Evolutionary graph theory provides a framework to study these effects.
Further empirical research is warranted in this understudied area.