thumbnail

Spatial genetic structure and regional demography in the southern torrent salamander: Implications for conservation and management

Journal of Heredity

By:
, ,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

Abstract

The Southern torrent salamander (Rhyacotriton variegatus) was recently found not warranted for listing under the US Endangered Species Act due to lack of information regarding population fragmentation and gene flow. Found in small-order streams associated with late-successional coniferous forests of the US Pacific Northwest, threats to their persistence include disturbance related to timber harvest activities. We conducted a study of genetic diversity throughout this species' range to 1) identify major phylogenetic lineages and phylogeographic barriers and 2) elucidate regional patterns of population genetic and spatial phylogeographic structure. Cytochrome b sequence variation was examined for 189 individuals from 72 localities. We identified 3 major lineages corresponding to nonoverlapping geographic regions: a northern California clade, a central Oregon clade, and a northern Oregon clade. The Yaquina River may be a phylogeographic barrier between the northern Oregon and central Oregon clades, whereas the Smith River in northern California appears to correspond to the discontinuity between the central Oregon and northern California clades. Spatial analyses of genetic variation within regions encompassing major clades indicated that the extent of genetic structure is comparable among regions. We discuss our results in the context of conservation efforts for Southern torrent salamanders.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Spatial genetic structure and regional demography in the southern torrent salamander: Implications for conservation and management
Series title:
Journal of Heredity
Volume
97
Issue:
6
Year Published:
2006
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 561-570
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
561
Last page:
570
Number of Pages:
10