Publication Date:
2017-02-17
Description:
We investigate patterns of historical assembly of tree communities across Amazonia using a newly developed phylogeny for the species-rich neotropical tree genusInga. We compare our results with those for three other ecologically important, diverse, and abundant Amazonian tree lineages,Swartzia, Protieae, andGuatteria. Our analyses using phylogenetic diversity metrics demonstrate a clear lack of geographic phylogenetic structure, and show that local communities ofIngaand regional communities of all four lineages are assembled by dispersal across Amazonia. The importance of dispersal in the biogeography ofIngaand other tree genera in Amazonian and Guianan rain forests suggests that speciation is not driven by vicariance, and that allopatric isolation following dispersal may be involved in the speciation process. A clear implication of these results is that over evolutionary timescales, the metacommunity for any local or regional tree community in the Amazon is the entire Amazon basin.
Print ISSN:
0027-8424
Electronic ISSN:
1091-6490
Topics:
Biology
,
Medicine
,
Natural Sciences in General
Permalink