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Media type:
E-Article
Title:
On the importance of evolving phenotype distributions on evolutionary diversification
Contributor:
Henriques, Gil Jorge Barros;
Ito, Koichi;
Hauert, Christoph;
Doebeli, Michael
imprint:
Public Library of Science (PLoS), 2021
Published in:PLOS Computational Biology
Language:
English
DOI:
10.1371/journal.pcbi.1008733
ISSN:
1553-7358
Origination:
Footnote:
Description:
<jats:p>Evolutionary branching occurs when a population with a unimodal phenotype distribution diversifies into a multimodally distributed population consisting of two or more strains. Branching results from frequency-dependent selection, which is caused by interactions between individuals. For example, a population performing a social task may diversify into a cooperator strain and a defector strain. Branching can also occur in multi-dimensional phenotype spaces, such as when two tasks are performed simultaneously. In such cases, the strains may diverge in different directions: possible outcomes include division of labor (with each population performing one of the tasks) or the diversification into a strain that performs both tasks and another that performs neither. Here we show that the shape of the population’s phenotypic distribution plays a role in determining the direction of branching. Furthermore, we show that the shape of the distribution is, in turn, contingent on the direction of approach to the evolutionary branching point. This results in a distribution–selection feedback that is not captured in analytical models of evolutionary branching, which assume monomorphic populations. Finally, we show that this feedback can influence long-term evolutionary dynamics and promote the evolution of division of labor.</jats:p>