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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Allopatry increases the balance of phylogenetic trees during radiation under neutral speciation

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Marquitti, Flavia Maria Darcie [1] ; Fernandes, Lucas D. [2] ; de Aguiar, Marcus Aloizio Martinez [1]
Total Authors: 3
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Campinas, SP - Brazil
[2] Imperial Coll London, Dept Life Sci, Ascot, Berks - England
Total Affiliations: 2
Document type: Journal article
Source: ECOGRAPHY; v. 43, n. 10 JUL 2020.
Web of Science Citations: 0

The shape of a phylogenetic tree is defined by the sequence of speciation events, represented by its branching points, and extinctions, represented by branch interruptions. In a neutral scenario of parapatry and isolation by distance, species tend to branch off the original population one after the other, leading to highly unbalanced trees. In this case the degree of imbalance, measured by the normalized Sackin index, grows linearly with species richness. Here we claim that moderate values of imbalance for trees with large number of species can occur if the geographic distribution involves more than one deme (allopatry) and speciation is parapatric within demes. The combined values of balance (normalized Sackin index) and species richness provide an estimate of how many demes were involved in the process if it happened in such neutral scenario. We also show that the spatial division in demes moderately slows down the diversification process, portraying a neutral mechanism for structuring the branch length distribution of phylogenetic trees. (AU)

FAPESP's process: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics
Grantee:Nathan Jacob Berkovits
Support type: Research Projects - Thematic Grants
FAPESP's process: 19/20271-5 - Evolutionary models in population dynamics
Grantee:Marcus Aloizio Martinez de Aguiar
Support type: Regular Research Grants
FAPESP's process: 15/11985-3 - Evolution of cooperation among different species
Grantee:Flávia Maria Darcie Marquitti
Support type: Scholarships in Brazil - Post-Doctorate