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Abstract Detail


Biogeography

Jabaily, Rachel S. [1], Sytsma, Kenneth J. [2].

Historical and Ecological Biogeography of Andean Puya (Bromeliaceae).

Puya (Bromeliaceae), with over 200 species found from central Chile to Venezuela, is an ideal group in which to study the processes of lineage diversification in the Andes because it is almost exclusively Andean and can be found over a wide range of habitats, latitudes and elevations. Species richness and range size patterns correspond to global patterns of increased species number towards the equator and at mid elevations, as well as larger range sizes in more temperate latitudes and mid elevations. A well-sampled and well-resolved phylogeny of Puya using AFLPs was created and issues of AFLP data scoring were explored. Species geographic ranges were optimized onto the phylogeny in four ways: 1) areas of endemism, 2) Andean cordillera location, 3) latitudes north and south of the Western Andean Portal zone and 4) elevations above and below treeline. Evolution of these area characters was elucidated using both the Multistate and Discrete programs implemented in BayesTraits. The AFLP phylogeny enhances earlier direct-sequencing efforts and major clades are primarily united by broad latitudinal zone, though some clades are found exclusively in certain cordilleras. A single movement into the northern Andes is implied, with no subsequent movements back across the Western Andean Portal south, following the south to north direction of Andean uplift. Major shifts both up and down in elevation were inferred to have been common, perhaps corresponding to multiple Pleistocene glaciation cycles.

Broader Impacts:


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1 - Old Dominion University, Biology, 110 Mills Godwin Building, Norfolk, VA, 23529, USA
2 - University of Wisconsin Madison, Department of Botany, Birge Hall, 430 Lincoln Drive, Madison, Wisconsin, 53706-1381, USA

Keywords:
Bromeliaceae
Andes
Puya
AFLP
BayesTraits
Biogeography.

Presentation Type: Oral Paper:Papers for Topics
Session: 3
Location: 551A/Convention Center
Date: Monday, August 2nd, 2010
Time: 9:15 AM
Number: 3006
Abstract ID:199


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