Abstract Detail



Biogeography

Naranjo, Andre [1], Gitzendanner, Matt [2], Soltis, Douglas [3], Soltis, Pamela [4].

Patterns of Biogeography & Diversification in the Scrub Mint Clade (Lamiaceae) using target enrichment.

The Scrub Mint clade (Lamiaceae) provides a unique system for investigating the evolutionary processes driving diversification in the North American Coastal Plain from both a systematic and biogeographic context. The clade comprises Dicerandra, Conradina, Piloblephis, Stachydeoma, and four species of Clinopodium (Mentheae; Lamiaceae), almost all of which are endemic to the North American Coastal Plain. Most species of this clade are threatened or endangered and restricted to sand hill vegetation and a mosaic of scrub habitats; some species are restricted to just one or two sites in peninsular Florida and Georgia. Using both novel and established approaches, we analyzed evolutionary relationships in this clade to help us understand the biogeography of the group and answer questions regarding phylogenetic structure and diversification rates across the physical landscape. We generated a dated phylogeny using a target enrichment/capture dataset, and then calculated mean pairwise distance and mean nearest taxon distance. We also estimated the geographical range evolution of subclades and tested whether speciation and extinction rates were affected by dispersal events. These results have helped clarify whether certain scrub mint communities are over-dispersed or clustered and elucidate the processes behind geographic variation in speciation and extinction rates during the diversification of this clade.


1 - University of Florida, Biology, Po Box 117800, Gainesville
2 - University Of Florida, Biology, PO Box 117800, Gainesville, FL, 32611, United States
3 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611, USA
4 - University Of Florida, Florida Museum Of Natural History, Po Box 117800, Gainesville, FL, 32611, United States

Keywords:
endemism
biogeography
diversification
north american coastal plain
phylogenetic diversity.

Presentation Type: Oral Paper
Number:
Abstract ID:555
Candidate for Awards:None


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