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dc.contributor.supervisor Hopkinson, Christopher
dc.contributor.author McCaffrey, David R.
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2018-04-10T21:29:05Z
dc.date.available 2018-04-10T21:29:05Z
dc.date.issued 2018
dc.identifier.uri https://hdl.handle.net/10133/5086
dc.description.abstract Alpine treeline ecotone (ATE) is a dynamic region where tree growth is limited by atmospheric temperature. Landscape scale variation in climate, topography, and disturbance regimes cause heterogeneity in the ATE by suppressing tree elevation below the absolute thermal limit to growth. In order to understand how ATE will respond to anticipated atmospheric warming, observations of historic change are required. This research introduces a novel method of canopy cover observation using oblique historic imagery. ATE change is assessed in the West Castle Watershed between 1914-2006, and found to be correlated to elevation, aspect, and fire-exposure. A random forest model was used to test a spatial extension of observed canopy cover change into areas that were not observed in the oblique imagery. This model used proxies for climate, topography, and disturbance regime as predictive variables. Collectively, this thesis research demonstrates that oblique photography can provide valuable insights into dynamic processes in the ATE. en_US
dc.language.iso en_US en_US
dc.publisher Lethbridge, Alta. : Universtiy of Lethbridge, Department of Geography en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Ecotones--Alberta--West Castle Watershed en_US
dc.subject Timberline--Alberta--West Castle Watershed en_US
dc.subject Forest canopies--Alberta--West Castle Watershed en_US
dc.subject Climatic changes--Alberta--West Castle Watershed en_US
dc.subject Trees--Ecophysiology--Alberta--West Castle Watershed en_US
dc.subject Aerial photography in forestry--Alberta--West Castle Watershed en_US
dc.subject West Castle Watershed (Alta.)--Research en_US
dc.subject alpine treeline ecotone en_US
dc.subject canopy cover en_US
dc.subject oblique photography en_US
dc.title Assessing historic change in subalpine forest : a case study in the West Castle Watershed en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Geography en_US
dc.degree.level Masters en_US
dc.proquest.subject 0368 en_US
dc.proquest.subject 0799 en_US
dc.proquest.subject 0329 en_US
dc.proquestyes Yes en_US
dc.embargo No en_US


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