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Abstract Detail

Systematics Section/ASPT

Salinas , Nelson R [1], Pedraza, Paola [2].

Biogeographic history of Andean Vaccinieae (Ericaceae).

Distribution patterns and geographic range evolution of Andean Blueberries (Vaccinieae: Ericaceae) were studied. Six areas of endemism were detected through Biotic Element Analysis: Central America, Choco, Western Ecuador, Eastern Ecuador, Yungas, and Northern Andes. Biogeographic barriers, inferred via Spatial Analysis of Vicariance, were mostly located along the boundaries of the aforementioned areas, especially Central America-Choco, Northern Andes-Eastern Ecuador, and Eastern Ecuador-Yungas. Calibrated phylogenies and Statistical Dispersal-Vicariance Analysis showed that the Vaccinieae immigrated into South America in the early Miocene (18-27 MA), and diversified mostly during the Terciary. The first area to be colonized in South America was the Choco, which remained the predominant ancestral area until late Miocene (7.5 MA). The Yungas have been a frequent target of dispersal events ever since, and this is probably related to the end of the massive marine incursion in southern Ecuador (9.5 MA). Subsequent cladogenesis in the Yungas resulted in the origin of several lineages restricted to Peru and Bolivia. Putative vicariant events were recovered throughout the history of the Andean clade, however they were unambiguously supported at nodes older than mid Miocene (12 MA), a peak period of tectonic activity in the Northern Andes. Overall, these results highlight the role of Andean orogeny in the diversification of South American Ericaceae.

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1 - The New York Botanical Garden, Pfizer Plant Research Laboratory, 2900 Southern Blvd., Bronx, NY, 10458, USA
2 - New York Botanical Garden, Institute Of Systematic Botany, 2900 Southern Blvd., Bronx, NY, 10458, USA

Comparative methods
Andean plants.

Presentation Type: Oral Paper:Papers for Sections
Session: 30
Location: Payette/Boise Centre
Date: Tuesday, July 29th, 2014
Time: 2:15 PM
Number: 30004
Abstract ID:433
Candidate for Awards:George R. Cooley Award

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