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Abstract Detail

Systematics Section/ASPT

Spalink, Daniel [1], Drew, Bryan T. [2], Zaborsky, John [1], Starr, Julian [3], Cameron, Kenneth [4], SYTSMA , KENNETH JAY [5].

Historical biogeography and diversification of the cosmopolitan Cyperaceae.

Cyperaceae, the third largest monocot family, exhibits a remarkable range of ecological, physiological, and biogeographical diversification. Although cosmopolitan in distribution, generic centers of diversity are found on every continent except Antarctica. Key insights into the timing, rate, and place of diversification are afforded by a time-calibrated phylogeny in conjunction with historical biogeographical reconstructions. We present a new chronogram of Cyperaceae constructed in BEAST that is based on four chloroplast markers and calibrated with 17 fossils throughout Poales. Utilizing emerging methods in biogeographical reconstruction including the R package BioGeoBEARS, we demonstrate a clear origin of Cyperaceae in the neotropics about 86 mya, followed by a complex pattern of diversification including range expansion and vicariance as well as founder-effect cladogenesis. We reassess significant shifts in diversification rates as they relate to biogeographical patterns and discuss the utility and placement of several commonly utilized fossil calibration points throughout Poales.

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1 - University of Wisconsin-Madison, Department of Botany, 430 Lincoln Drive, Madison, WI, 53706, USA
2 - Department of Biology, University of Florida, Gainesville, FL 32611-85
3 - University of Ottawa, 30 Marie Curie, Ottawa, Ontario, K1N 6n5, Canada
4 - University Of Wisconsin, Department Of Botany, 154 Birge Hall, 450 Lincoln Drive, Madison, WI, 53706, USA
5 - University Of Wisconsin, Department Of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, USA


Presentation Type: Oral Paper:Papers for Sections
Session: 13
Location: Pines South/Boise Centre
Date: Monday, July 28th, 2014
Time: 2:15 PM
Number: 13004
Abstract ID:590
Candidate for Awards:George R. Cooley Award

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