The Pleistocene was a dynamic period for Holarctic mammal species, complicated by
episodes of glaciation, local extinctions, and intercontinental migration. The genetic …

The fossil record indicates that the brown bear (Ursus arctos) colonized North America from
Asia over 50 000 years ago. The species historically occupied the western United States …

Studies of species with continental distributions continue to identify intraspecific lineages
despite continuous habitat. Lineages may form due to isolation by distance, adaptation …

The genetic diversity of present‐day brown bears (Ursus arctos) has been extensively
studied over the years and appears to be geographically structured into five main clades …

To determine the extent of phylogeographic structuring in North American black bear (Ursus
americanus) populations, we examined mitochondrial DNA sequences (n= 118) and …

ABSTRACT 1 We review the genetics research that has been conducted on the European
brown bear Ursus arctos, one of the genetically best‐studied mammalian species. 2 The first …

The controversial role of Haida Gwaii (Queen Charlotte Islands) as a biological refugium on
the northwestern coast of North America has been widely discussed for more than fifty years …

The historical distribution of the brown bear (Ursus arctos) in North America included Alaska,
western Canada, the western and midwestern states, plus northern Mexico. Currently, the …

Polar bears (PBs) are superbly adapted to the extreme Arctic environment and have become
emblematic of the threat to biodiversity from global climate change. Their divergence from …

Recent genomic analyses have provided substantial evidence for past periods of gene flow
from polar bears (Ursus maritimus) into Alaskan brown bears (Ursus arctos), with some …