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Abstract Detail



Biogeography

Jost, Lou [1], Neubig, Kurt [2], Endara, Lorena [2], Whitten, William [3].

Exploring the biogeography of high elevations in the Andes using phylogenetic relationships in Teagueia (Orchidaceae).

Until the late 1990’s, the genus Teagueia contained only 6 species. Now, with the discovery of new populations in central Ecuador at or above 3000 m, the genus has grown to ~30 species. This newly discovered group of species forms a strongly supported clade. The phylogenetic results are mostly consistent with species circumscriptions based on morphology, although with some limitations in phylogenetic resolution (probably due to rapid radiation). Although these species are known from only a small region of Ecuador, there is strong biogeographic signal in phylogenetic trees among mountaintops and ranges, with strong geographic barriers such as the Pastaza River and discontinuous high elevation areas. This example of such high species richness in a single young clade richness in a small area might represent strong ecologically mediated speciation due to isolation on high elevation mountaintop habitats.

Broader Impacts:


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1 - Via Runtun, Banos, Tungurahua, Ecuador
2 - University of Florida, Florida Museum of Natural History, Gainesville, FL, 32611, USA
3 - University of Florida, Florida Museum of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA

Keywords:
Andes
biogeography
Orchidaceae
phylogeny
Teagueia
Pleurothallidinae.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Grand Salon A - D/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 5:30 PM
Number: PBG004
Abstract ID:321
Candidate for Awards:None


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