English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

When a biological population expands into new territory, genetic driftdevelops an enormous influence on evolution at the propagating front. In suchrange expansion processes, fluctuations in allele frequencies occur throughstochastic \textit{spatial} wandering of both genetic lineages and theboundaries between genetically segregated sectors. Laboratory experiments onmicrobial range expansions have shown that this stochastic wandering,transverse to the front, is superdiffusive due to the front's growingroughness, implying much faster loss of genetic diversity than predicted bysimple flat front diffusive models. We study the evolutionary consequences ofthis superdiffusive wandering using two complementary numerical models of rangeexpansions: the stepping stone model, and a new interpretation of the model ofdirected paths in random media, in the context of a roughening populationfront. Through these approaches we compute statistics for the times sincecommon ancestry for pairs of individuals with a given spatial separation at thefront, and we explore how environmental heterogeneities can locally suppressthese superdiffusive fluctuations.

Evolution in range expansions with competition at rough boundaries