Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Q05: Ecological and Evolutionary Dynamics IV
3:00 PM–6:00 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-178A
Sponsoring
Unit:
DBIO
Chair: Daniel Weissman, Emory
Abstract: Q05.00013 : Effect of environmental heterogeneity on mutation-selection balance during range expansions*
5:48 PM–6:00 PM
Presenter:
Wolfram Moebius
(Living Systems Institute and Physics & Astronomy, University of Exeter, Exeter, UK)
Authors:
Wolfram Moebius
(Living Systems Institute and Physics & Astronomy, University of Exeter, Exeter, UK)
Thomas Tunstall
(Living Systems Institute and Physics & Astronomy, University of Exeter, Exeter, UK)
Tim Rogers
(Centre for Networks and Collective Behaviour, Department of Mathematical Sciences, University of Bath, Bath, UK)
We consider a system with mutation and selection where individuals with deleterious alleles have an advantage in isolated patches, but a disadvantage everywhere else.
Simulations and theoretical analysis highlight that the deleterious allele can fix at the population front even when the density of patches is below the one guaranteeing spread via percolation. We are able to predict this regime using least-time arguments for front propagation.
Our findings are an example of two sub-critical processes assisting each other to achieve super-criticality. From an applied perspective, it highlights the role of landscape structure during evolution, for example on the emergence of pesticide resistance.
*TT was supported by an EPSRC DTP PhD studentship and Syngenta.
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