Range limitations and phylogeography of stream salamanders in Quebec and Labrador
Physical barriers are known to limit species' ranges, but, in the absence of physical barriers, what prevents adaptation and expansion at the periphery? Genetic influence from central populations may prevent adaptation to ecological barriers by swamping peripheral populations with suboptimal ge...
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ftcanadathes:oai:collectionscanada.gc.ca:QMM.101621 2023-05-15T17:20:02+02:00 Range limitations and phylogeography of stream salamanders in Quebec and Labrador Markle, Tricia M. Master of Science (Department of Biology.) 2006 application/pdf http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101621 en eng McGill University alephsysno: 002599498 proquestno: AAIMR32749 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101621 © Tricia M. Markle, 2006 Northern two-lined salamander -- Home range -- Québec (Province) Northern dusky salamander -- Home range -- Québec (Province) Phylogeography -- Québec (Province) Northern two-lined salamander -- Home range -- Newfoundland and Labrador -- Labrador Northern dusky salamander -- Home range -- Newfoundland and Labrador -- Labrador Phylogeography -- Newfoundland and Labrador -- Labrador Electronic Thesis or Dissertation 2006 ftcanadathes 2014-02-16T00:55:56Z Physical barriers are known to limit species' ranges, but, in the absence of physical barriers, what prevents adaptation and expansion at the periphery? Genetic influence from central populations may prevent adaptation to ecological barriers by swamping peripheral populations with suboptimal genes. If this is the case, then isolation may enable local adaptation and further range expansion. Barriers such as rivers provide ideal tests of the influence of gene flow and may explain differences in range sizes. This study investigates northern range limitations and phylogeography of the Northern Two-lined ( Eurycea bislineata) and Northern Dusky (Desmognathus fuscus ) stream salamanders. Phylogeographic patterns of populations throughout Quebec and Labrador were investigated by sequencing portions of cytochrome b and 12S rRNA mitochondrial DNA genes. Interpopulation divergence was low for both species, however, unique genetic haplotypes and morphological variation on the north shore of the St. Lawrence indicate that the river is acting as a barrier to gene flow. Thesis Newfoundland Theses Canada/Thèses Canada (Library and Archives Canada) Newfoundland |
institution |
Open Polar |
collection |
Theses Canada/Thèses Canada (Library and Archives Canada) |
op_collection_id |
ftcanadathes |
language |
English |
topic |
Northern two-lined salamander -- Home range -- Québec (Province) Northern dusky salamander -- Home range -- Québec (Province) Phylogeography -- Québec (Province) Northern two-lined salamander -- Home range -- Newfoundland and Labrador -- Labrador Northern dusky salamander -- Home range -- Newfoundland and Labrador -- Labrador Phylogeography -- Newfoundland and Labrador -- Labrador |
spellingShingle |
Northern two-lined salamander -- Home range -- Québec (Province) Northern dusky salamander -- Home range -- Québec (Province) Phylogeography -- Québec (Province) Northern two-lined salamander -- Home range -- Newfoundland and Labrador -- Labrador Northern dusky salamander -- Home range -- Newfoundland and Labrador -- Labrador Phylogeography -- Newfoundland and Labrador -- Labrador Markle, Tricia M. Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
topic_facet |
Northern two-lined salamander -- Home range -- Québec (Province) Northern dusky salamander -- Home range -- Québec (Province) Phylogeography -- Québec (Province) Northern two-lined salamander -- Home range -- Newfoundland and Labrador -- Labrador Northern dusky salamander -- Home range -- Newfoundland and Labrador -- Labrador Phylogeography -- Newfoundland and Labrador -- Labrador |
description |
Physical barriers are known to limit species' ranges, but, in the absence of physical barriers, what prevents adaptation and expansion at the periphery? Genetic influence from central populations may prevent adaptation to ecological barriers by swamping peripheral populations with suboptimal genes. If this is the case, then isolation may enable local adaptation and further range expansion. Barriers such as rivers provide ideal tests of the influence of gene flow and may explain differences in range sizes. This study investigates northern range limitations and phylogeography of the Northern Two-lined ( Eurycea bislineata) and Northern Dusky (Desmognathus fuscus ) stream salamanders. Phylogeographic patterns of populations throughout Quebec and Labrador were investigated by sequencing portions of cytochrome b and 12S rRNA mitochondrial DNA genes. Interpopulation divergence was low for both species, however, unique genetic haplotypes and morphological variation on the north shore of the St. Lawrence indicate that the river is acting as a barrier to gene flow. |
format |
Thesis |
author |
Markle, Tricia M. |
author_facet |
Markle, Tricia M. |
author_sort |
Markle, Tricia M. |
title |
Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
title_short |
Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
title_full |
Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
title_fullStr |
Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
title_full_unstemmed |
Range limitations and phylogeography of stream salamanders in Quebec and Labrador |
title_sort |
range limitations and phylogeography of stream salamanders in quebec and labrador |
publisher |
McGill University |
publishDate |
2006 |
url |
http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101621 |
op_coverage |
Master of Science (Department of Biology.) |
geographic |
Newfoundland |
geographic_facet |
Newfoundland |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
alephsysno: 002599498 proquestno: AAIMR32749 Theses scanned by UMI/ProQuest. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101621 |
op_rights |
© Tricia M. Markle, 2006 |
_version_ |
1766096978661343232 |