Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States
Phylogeographical analyses conducted in the Pacific Northwestern United States have often revealed concordant patterns of genetic diversity among taxa. These studies demonstrate distinct North/South genetic discontinuities that have been attributed to Pleistocene glaciation. We examined phylogeograp...
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ftunivnebraskali:oai:digitalcommons.unl.edu:usgsstaffpub-1695 2023-11-12T04:18:51+01:00 Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States Miller, Mark P. Bellinger, M. Renee Forsman, Eric D. Haig, Susan M. 2006-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usgsstaffpub/686 https://digitalcommons.unl.edu/context/usgsstaffpub/article/1695/viewcontent/Haig_ME_2006_Effects_of_historical_climate_change.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usgsstaffpub/686 https://digitalcommons.unl.edu/context/usgsstaffpub/article/1695/viewcontent/Haig_ME_2006_Effects_of_historical_climate_change.pdf USGS Staff -- Published Research interpolation mitochondrial control region Phenacomys longicaudus phylogeography Pleistocene glaciation spatial genetic analysis text 2006 ftunivnebraskali 2023-10-30T11:00:57Z Phylogeographical analyses conducted in the Pacific Northwestern United States have often revealed concordant patterns of genetic diversity among taxa. These studies demonstrate distinct North/South genetic discontinuities that have been attributed to Pleistocene glaciation. We examined phylogeographical patterns of red tree voles (Phenacomys longicaudus) in western Oregon by analysing mitochondrial control region sequences for 169 individuals from 18 areas across the species’ range. Cytochrome b sequences were also analysed from a subset of our samples to confirm the presence of major haplotype groups. Phylogenetic network analyses suggested the presence of two haplotype groups corresponding to northern and southern regions of P. longicaudus’ range. Spatial genetic analyses (SAMOVA and Genetic Landscape Shapes) of control region sequences demonstrated a primary genetic discontinuity separating northern and southern sampling areas, while a secondary discontinuity separated northern sampling areas into eastern and western groups divided by the Willamette Valley. The North/South discontinuity likely corresponds to a region of secondary contact between lineages rather than an overt barrier. Although the Cordilleran ice sheet (maximum ∼ 12 000 years ago) did not move southward to directly affect the region occupied by P. longicaudus, climate change during glaciation fragmented the forest landscape that it inhabits. Signatures of historical fragmentation were reflected by positive associations between latitude and variables such as Tajima’s D and patterns associated with location-specific alleles. Genetic distances between southern sampling areas were smaller, suggesting that forest fragmentation was reduced in southern vs. northern regions. Text Ice Sheet University of Nebraska-Lincoln: DigitalCommons@UNL Pacific Red Tree ENVELOPE(27.849,27.849,71.036,71.036) |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
interpolation mitochondrial control region Phenacomys longicaudus phylogeography Pleistocene glaciation spatial genetic analysis |
spellingShingle |
interpolation mitochondrial control region Phenacomys longicaudus phylogeography Pleistocene glaciation spatial genetic analysis Miller, Mark P. Bellinger, M. Renee Forsman, Eric D. Haig, Susan M. Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
topic_facet |
interpolation mitochondrial control region Phenacomys longicaudus phylogeography Pleistocene glaciation spatial genetic analysis |
description |
Phylogeographical analyses conducted in the Pacific Northwestern United States have often revealed concordant patterns of genetic diversity among taxa. These studies demonstrate distinct North/South genetic discontinuities that have been attributed to Pleistocene glaciation. We examined phylogeographical patterns of red tree voles (Phenacomys longicaudus) in western Oregon by analysing mitochondrial control region sequences for 169 individuals from 18 areas across the species’ range. Cytochrome b sequences were also analysed from a subset of our samples to confirm the presence of major haplotype groups. Phylogenetic network analyses suggested the presence of two haplotype groups corresponding to northern and southern regions of P. longicaudus’ range. Spatial genetic analyses (SAMOVA and Genetic Landscape Shapes) of control region sequences demonstrated a primary genetic discontinuity separating northern and southern sampling areas, while a secondary discontinuity separated northern sampling areas into eastern and western groups divided by the Willamette Valley. The North/South discontinuity likely corresponds to a region of secondary contact between lineages rather than an overt barrier. Although the Cordilleran ice sheet (maximum ∼ 12 000 years ago) did not move southward to directly affect the region occupied by P. longicaudus, climate change during glaciation fragmented the forest landscape that it inhabits. Signatures of historical fragmentation were reflected by positive associations between latitude and variables such as Tajima’s D and patterns associated with location-specific alleles. Genetic distances between southern sampling areas were smaller, suggesting that forest fragmentation was reduced in southern vs. northern regions. |
format |
Text |
author |
Miller, Mark P. Bellinger, M. Renee Forsman, Eric D. Haig, Susan M. |
author_facet |
Miller, Mark P. Bellinger, M. Renee Forsman, Eric D. Haig, Susan M. |
author_sort |
Miller, Mark P. |
title |
Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
title_short |
Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
title_full |
Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
title_fullStr |
Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
title_full_unstemmed |
Effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( Phenacomys longicaudus ) in the Pacific Northwestern United States |
title_sort |
effects of historical climate change, habitat connectivity, and vicariance on genetic structure and diversity across the range of the red tree vole ( phenacomys longicaudus ) in the pacific northwestern united states |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2006 |
url |
https://digitalcommons.unl.edu/usgsstaffpub/686 https://digitalcommons.unl.edu/context/usgsstaffpub/article/1695/viewcontent/Haig_ME_2006_Effects_of_historical_climate_change.pdf |
long_lat |
ENVELOPE(27.849,27.849,71.036,71.036) |
geographic |
Pacific Red Tree |
geographic_facet |
Pacific Red Tree |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
USGS Staff -- Published Research |
op_relation |
https://digitalcommons.unl.edu/usgsstaffpub/686 https://digitalcommons.unl.edu/context/usgsstaffpub/article/1695/viewcontent/Haig_ME_2006_Effects_of_historical_climate_change.pdf |
_version_ |
1782335394008793088 |