Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus)
Thesis (M.S.) University of Alaska Fairbanks, 1995 Phylogeographic patterns of genetic and morphologic variation were explored among six subspecies of the Holarctic tundra vole (Microtus oeconomus). but focused on those populations occurring in southcoastal Alaska. Allozyme electrophoresis and karyo...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/14766 2023-12-24T10:25:23+01:00 Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) Lance, Ellen Weintraub Cook, Joseph A. Klein, David R. 1995-12 http://hdl.handle.net/11122/14766 en_US eng http://hdl.handle.net/11122/14766 Voles Microtus Thesis ms 1995 ftunivalaska 2023-11-30T19:04:38Z Thesis (M.S.) University of Alaska Fairbanks, 1995 Phylogeographic patterns of genetic and morphologic variation were explored among six subspecies of the Holarctic tundra vole (Microtus oeconomus). but focused on those populations occurring in southcoastal Alaska. Allozyme electrophoresis and karyotyping revealed that, although levels of intraspecific variation were low compared to other species of Microtus. allozymic divergence was concordant with regional glacial history. Tundra voles from interior Alaska became established prior to the last glacial retreat. However, populations from southcoastal Alaska were founded more recently. Tundra voles from Montague Island, an endemic subspecies, exhibited features of the island syndrome (i. e., gigantism, older age structure). Factors potentially responsible for insular gigantism were assessed. The findings of this study fail to support the hypothesis that the island syndrome is a direct result of interspecific competition. Other density-dependent factors, such as predation, may be responsible for body size and demographic changes in these insular rodents. U.S.D.A. Forest Service, Chugach National Forest and U.S. Fish and Wildlife Service, Ecological Services Thesis Tundra Alaska University of Alaska: ScholarWorks@UA Fairbanks Montague ENVELOPE(-136.021,-136.021,61.783,61.783) |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Voles Microtus |
spellingShingle |
Voles Microtus Lance, Ellen Weintraub Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
topic_facet |
Voles Microtus |
description |
Thesis (M.S.) University of Alaska Fairbanks, 1995 Phylogeographic patterns of genetic and morphologic variation were explored among six subspecies of the Holarctic tundra vole (Microtus oeconomus). but focused on those populations occurring in southcoastal Alaska. Allozyme electrophoresis and karyotyping revealed that, although levels of intraspecific variation were low compared to other species of Microtus. allozymic divergence was concordant with regional glacial history. Tundra voles from interior Alaska became established prior to the last glacial retreat. However, populations from southcoastal Alaska were founded more recently. Tundra voles from Montague Island, an endemic subspecies, exhibited features of the island syndrome (i. e., gigantism, older age structure). Factors potentially responsible for insular gigantism were assessed. The findings of this study fail to support the hypothesis that the island syndrome is a direct result of interspecific competition. Other density-dependent factors, such as predation, may be responsible for body size and demographic changes in these insular rodents. U.S.D.A. Forest Service, Chugach National Forest and U.S. Fish and Wildlife Service, Ecological Services |
author2 |
Cook, Joseph A. Klein, David R. |
format |
Thesis |
author |
Lance, Ellen Weintraub |
author_facet |
Lance, Ellen Weintraub |
author_sort |
Lance, Ellen Weintraub |
title |
Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
title_short |
Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
title_full |
Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
title_fullStr |
Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
title_full_unstemmed |
Phylogeographic variation and the island syndrome in holarctic tundra voles (Microtus oeconomus) |
title_sort |
phylogeographic variation and the island syndrome in holarctic tundra voles (microtus oeconomus) |
publishDate |
1995 |
url |
http://hdl.handle.net/11122/14766 |
long_lat |
ENVELOPE(-136.021,-136.021,61.783,61.783) |
geographic |
Fairbanks Montague |
geographic_facet |
Fairbanks Montague |
genre |
Tundra Alaska |
genre_facet |
Tundra Alaska |
op_relation |
http://hdl.handle.net/11122/14766 |
_version_ |
1786201148232826880 |