Type of Document	Thesis
Author	Albright, James Christopher
Author's Email Address	albright@bio.fsu.edu
URN	etd-11152004-170408
Title	Phylogeography of the Sigmodontine Rodent, Phyllotis Xanthopygus, and a Test of the Sensitivity of Nested Clade Analysis to Elevation-based Alternative Distances.
Degree	Master of Science
Department	Biological Science, Department of
Advisory Committee	Advisor Name Title Scott Steppan Committee Chair Dave Swofford Committee Member Don Levitan Committee Member
Keywords	Phyllotini Phyllotis Nested Clade Analysis Phylogeography Andes
Date of Defense	2004-11-01
Availability	unrestricted
Abstract I undertook a phylogenetic and phylogeographic study of the widespread Andean rodent, Phyllotis xanthopygus. My goals were to obtain general information about the history of the species and to explore some issues of Nested Clade Analysis (NCA) sensitivity in an empirical framework. The mitochondrial marker, cytochrome-b, was sequenced to produce an intraspecific maximum-likelihoo phylogeny of Phyllotis xanthopygus. I assessed the sensitivity of NCA to alternative distances by incorporating physiognomic information in the form of two elevation distances based on isolines. The elevation distances were largely congruent, but they both differed from the standard great-circle distance metrics. Only three out of nine phylogeographic inferences were the same for the different approaches.
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