Associate Professor Sharon Jansa
Graduate Faculty Memberships
Conservation Biology; Ecology, Evolution, and Behavior
Mammalian systematics, biogeography, phylogeography, phylogenetic theory, molecular systematics and evolution.
My research is primarily concerned with the systematics and biogeography of localized mammalian radiations. I am currently focusing on three isolated groups of mammals: the native rodents of Madagascar, the indigenous rodents of the Philippines, and South American didelphid marsupials. Each of these groups contains species that have evolved to take advantage of a wide range of ecological conditions and exhibit a broad array of morphological adaptations. Reconstructing the evolutionary history of these groups is the first step towards understanding which forces -- biological and geological -- have prompted their diversification. I employ DNA sequence data to infer phylogenetic history, and I work with traditional systematists to combine morphological and molecular data to provide a better understanding of mammalian evolutionary history.
Jansa, S.A., F.K. Barker, and L.R. Heaney. (in press) Molecular Phylogenetics and Divergence Time Estimates for the Endemic Rodents of the Philippine Islands: Evidence from Mitochondrial and Nuclear Gene Sequences. Systematic Biology
Jansa, S.A., J. Forsman,* and R.S. Voss (2006). Different patterns of selection on the nuclear genes IRBP and DMP-1 affect the efficiency but not the outcome of phylogeny estimation for didelphid marsupials. Molecular Phylogenetics and Evolution. (*Undergraduate Student)
Jansa, S.A. and R.S. Voss (2005). Phylogenetic relationships of the marsupial genus Hyladelphys based on nuclear gene sequences and morphology. Journal of Mammalogy. 86(5):853-865
Jansa, S.A. and M. Weksler. (2004) Phylogeny of muroid rodents: Relationships within and among major lineages as revealed by nuclear IRBP gene sequences. Molecular Phylogenetics and Evolution. 31:256-276.
Voss, R.S. and S.A. Jansa. (2003) Phylogenetic studies on didelphid marsupials II. Nonmolecular data and new IRBP sequences: Separate and combined analyses of didelphine relationships with denser taxon sampling. Bulletin of the American Museum of Natural History 276:82 pp.
Jansa, S.A., B.L. Lundrigan, and P.K. Tucker (2003) Tests of positive selection on immune and reproductive genes in the murine genus Mus. Journal of Molecular Evolution 56:294-307.
Lundrigan, B.L., S.A. Jansa, and P.K. Tucker (2002) Molecular phylogenetics of the genus Mus based on maternal, paternal, and bi-parentally inherited characters. Systematic Biology 51:410-431.
Jansa, S.A. and R.S. Voss (2000) Phylogenetic studies on didelphid marsupials I: Introduction and preliminary results from IRBP gene sequences. Journal of Mammalian Evolution. 7(1):43-77.
Jansa, S.A., S.M. Goodman, and P.K. Tucker (1999) Molecular phylogenetics of the native rodents of Madagascar: A test of the single origin hypothesis. Cladistics 15:253-270.
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