IBIS-Flora

Angiosperm Flora of India

Cenozoic colonization and diversification patterns of tropical American palms: evidence from Astrocaryum (Arecaceae)

Publication Type:Journal Article
Year of Publication:2013
Authors:RONCAL, JULISSA, Kahn, F, Millan, B, COUVREUR, THOMASLP, PINTAUD, JEAN-CHRISTOPHE
Journal:Botanical Journal of the Linnean Society
Volume:171
Issue:1
Date Published:2013
ISBN Number:1095-8339
Keywords:ancestral range reconstruction, Andean uplift, Arecaceae, Dispersal, diversification rate shifts, extinction and cladogenesis (DEC) model, Guiana Shield, middle Miocene climatic optimum, Pebas, Western Amazon
Abstract:

With 788 species in 67 genera in the Neotropics, Arecaceae are an important ecological and economic component of the region. We review the influence of geological events such as the Pebas system, the Andean uplift and the land connections between South and Central/North America, on the historical assembly of Neotropical palms. We present a case study of the palm genus Astrocaryum (40 species) as a model for evaluating colonization and diversification patterns of lowland Neotropical taxa. We conducted a Bayesian dated phylogenetic analysis based on four low-copy nuclear DNA regions and a biogeographical analysis using the dispersal, extinction and cladogenesis model. Cladogenesis of Western Amazonian Astrocaryum spp. (c. 6 Mya) post-dated the drainage of the aquatic Pebas system, supporting the constraining role of Pebas on in situ diversification and colonization. The ancestral distribution of Astrocaryum spp. in the Guiana Shield supported the hypothesis of an old formation that acted as a source area from which species colonized adjacent regions, but an earliest branching position for Guianan species was not confidently recovered. A twofold increase in diversification rate was found in a clade, the ancestor of which occupied the Guiana Shield (c. 13 Mya, a time of climatic change and Andean uplift). © 2012 The Linnean Society of London, Botanical Journal of the Linnean Society, 2012, ●●, ●●–●●.

URL:http://dx.doi.org/10.1111/j.1095-8339.2012.01297.x
Short Title:Botanical Journal of the Linnean Society
Taxonomic name: 
Fri, 2014-01-24 18:13 -- admin
https://secure.gravatar.com/avatar/5ade1b012674ce3dd941e2ea5dd15cc1.jpg?d=https%3A//flora.indianbiodiversity.org/sites/all/modules/patches/contrib/gravatar/avatar.png&s=100&r=G
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith