Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada
Shifts in northern vegetation with warming are well documented, particularly at tree-line where species often are at their physiological limits. I investigated ecological and evolutionary controls on understory species composition at tree-line in the Yukon Territories of Canada. I found that plant f...
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University of Guelph
2016
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Online Access: | http://hdl.handle.net/10214/9421 |
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ftunivguelph:oai:atrium.lib.uoguelph.ca:10214/9421 2024-06-23T07:57:17+00:00 Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada Bernard, Jennifer Turetsky, Merritt 2016-01-04 application/pdf http://hdl.handle.net/10214/9421 en eng University of Guelph http://hdl.handle.net/10214/9421 All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. tree-line alpine understory Yukon Territory Thesis 2016 ftunivguelph 2024-05-29T00:00:15Z Shifts in northern vegetation with warming are well documented, particularly at tree-line where species often are at their physiological limits. I investigated ecological and evolutionary controls on understory species composition at tree-line in the Yukon Territories of Canada. I found that plant functional type abundance was more strongly influenced by aspect and elevation classes than by fine-scale soil parameters. South-facing, diffuse slopes, had greater shrub and lower bryophyte abundance than north-facing, abrupt slopes. I explored relationships between species diversity, co-occurrence, and overlap among aspect and elevational classes, and also examined the phylogenetic structuring of shrub species found on my gradients. I found that species occurrences, overlap, and phylogenetic structuring varied more strongly with aspect than elevation. Overall, my research emphasizes that both environmental and evolutionary controls influence plant communities at tree-line, and that differences between north- and south-facing slopes might make them respond uniquely to environmental change. Changing Cold Regions Network Northern Scientific Training Program Thesis Tundra Yukon University of Guelph: DSpace digital archive Yukon Canada |
institution |
Open Polar |
collection |
University of Guelph: DSpace digital archive |
op_collection_id |
ftunivguelph |
language |
English |
topic |
tree-line alpine understory Yukon Territory |
spellingShingle |
tree-line alpine understory Yukon Territory Bernard, Jennifer Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
topic_facet |
tree-line alpine understory Yukon Territory |
description |
Shifts in northern vegetation with warming are well documented, particularly at tree-line where species often are at their physiological limits. I investigated ecological and evolutionary controls on understory species composition at tree-line in the Yukon Territories of Canada. I found that plant functional type abundance was more strongly influenced by aspect and elevation classes than by fine-scale soil parameters. South-facing, diffuse slopes, had greater shrub and lower bryophyte abundance than north-facing, abrupt slopes. I explored relationships between species diversity, co-occurrence, and overlap among aspect and elevational classes, and also examined the phylogenetic structuring of shrub species found on my gradients. I found that species occurrences, overlap, and phylogenetic structuring varied more strongly with aspect than elevation. Overall, my research emphasizes that both environmental and evolutionary controls influence plant communities at tree-line, and that differences between north- and south-facing slopes might make them respond uniquely to environmental change. Changing Cold Regions Network Northern Scientific Training Program |
author2 |
Turetsky, Merritt |
format |
Thesis |
author |
Bernard, Jennifer |
author_facet |
Bernard, Jennifer |
author_sort |
Bernard, Jennifer |
title |
Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
title_short |
Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
title_full |
Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
title_fullStr |
Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
title_full_unstemmed |
Changes in understory plant species abundance along tree-tundra ecotones in the Yukon Territory, Canada |
title_sort |
changes in understory plant species abundance along tree-tundra ecotones in the yukon territory, canada |
publisher |
University of Guelph |
publishDate |
2016 |
url |
http://hdl.handle.net/10214/9421 |
geographic |
Yukon Canada |
geographic_facet |
Yukon Canada |
genre |
Tundra Yukon |
genre_facet |
Tundra Yukon |
op_relation |
http://hdl.handle.net/10214/9421 |
op_rights |
All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated. |
_version_ |
1802650857681977344 |