Main content

Response of Alpine Treeline Ecotones to 20th Century Climate Change: A Comparative Analysis from Kananaskis, Alberta

Show full item record

Title: Response of Alpine Treeline Ecotones to 20th Century Climate Change: A Comparative Analysis from Kananaskis, Alberta
Author: Brown, Robert
Department: Department of Geography
Program: Geography
Advisor: Gedalof, Ze'ev
Abstract: This study examines the changing conditions at high elevation alpine treeline ecotones (ATEs) in the southern Rocky Mountains of Alberta, Canada. Using age reconstructions from core and disc samples removed from trees at ATEs throughout the Kananaskis Valley of Alberta, we were able to identify statistically significant correlations between warming winter temperatures and seedling establishment at elevations beyond the present treeline. Further, we were able to identify multi-phase patterns of upslope treeline encroachment, suggesting climate as a key driver of initial seedling establishment beyond modern treeline elevations succeeded by a secondary process of forest density infilling largely controlled by the availability of local viable seed sources and the alterations of local microclimates that promote heightened seedling establishment. The results suggest that ongoing anthropogenic climate warming will continue to drive the upslope encroachment of ATEs in Kananaskis Country, Alberta.
URI: http://hdl.handle.net/10214/5339
Date: 2013-01
Terms of Use: All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.


Files in this item

Files Size Format View Description
Brown_Thesis_Treeline.pdf 5.858Mb PDF View/Open pdf

This item appears in the following Collection(s)

Show full item record