Biology ETDs
Publication Date
Summer 7-15-2026
Abstract
Eurasia's ancient geology and extreme environments, combined with diverse topography and Quaternary climate oscillations, have significantly influenced the genetic structure of its fauna. Unlike Europe and North America, much of high latitude Asia remained ice-free during glaciation, allowing species to persist more widely. However, this region has received limited research attention. In my study, I examined shrews in the Sorex ‘caecutiens’ and ‘minutus’ groups to understand genetic relationships across Eurasia. Using mitochondrial cytochrome b gene data, I identified well-supported phylogenetic relationships and found that Pacific Coastal Archipelagos played a key role in shrew diversification. Additionally, a longitudinal gradient of genetic diversity was observed, reflecting east-west population expansions during the Late Pleistocene. This contrasts with the northward expansion seen in European and North American species. My findings provide new insights into the historical biogeography of a minimally studied region of Asia.
Language
English
Keywords
Biogeography, Mammalogy, Genetics, Eurasia, Shews
Document Type
Thesis
Degree Name
Biology
Level of Degree
Masters
Department Name
UNM Biology Department
First Committee Member (Chair)
Joseph A. Cook
Second Committee Member
Lisa N. Barrow
Third Committee Member
Jason L. Malaney
Recommended Citation
Land, Danielle M.. "IF THE SHREW FITS, SEQUENCE IT: THE HISTORICAL BIOGEOGRAPHY OF EURASIAN SHREWS." (2026). https://digitalrepository.unm.edu/biol_etds/592
