| Full text | |
| Author(s): |
Marquitti, Flavia Maria Darcie
[1]
;
Fernandes, Lucas D.
[2]
;
de Aguiar, Marcus Aloizio Martinez
[1]
Total Authors: 3
|
| Affiliation: | [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 |
| Abstract | |
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 Opportunities: | Special Projects |
| FAPESP's process: | 19/20271-5 - Evolutionary models in population dynamics |
| Grantee: | Marcus Aloizio Martinez de Aguiar |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 15/11985-3 - Evolution of cooperation among different species |
| Grantee: | Flávia Maria Darcie Marquitti |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |