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Permanent link (DOI): https://doi.org/10.7939/R3K606

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The potential influence of mountain pine beetle (Dendroctonus ponderosae) control harvesting on grizzly bear (Ursus arctos) food supply and habitat conditions in Alberta Open Access

Descriptions

Other title
Subject/Keyword
Habitat selection
Forest management
Grizzly bear
Food supply
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Larsen, Terrence Alexander
Supervisor and department
Bayne, Erin (Biological Sciences)
Examining committee member and department
Stenhouse, Gordon (External)
Boyce, Mark (Biological Sciences)
Boutin, Stan (Biological Sciences)
Erbilgin, Nadir (Renewable Resources)
Department
Department of Biological Sciences
Specialization
Ecology
Date accepted
2012-09-28T12:37:36Z
Graduation date
2012-09
Degree
Master of Science
Degree level
Master's
Abstract
In response to the mountain pine beetle (Dendroctonus ponderosae) threat in Alberta, forest companies plan to surge harvest 75% of susceptible (mature) lodgepole pine (Pinus contorta) stands over 20 years. To assess potential changes to grizzly bear (Ursus arctos) habitat, I projected food availability over 60 years in the Upper Foothills. I also examined grizzly bear response to pine age, and its interaction with elevation and edge proximity. Post surge, forbs were predicted to increase by 25% and fruits by 2%. After 60 years, forbs should remain above (13%) while fruits could decline below (10%) pre-harvest conditions. Less Vaccinium membranaceum shrubs above 1228m and reduced Vaccinium myrtilloides fruit production below 1228m contributed to the decline. If the surge cut proceeds, efforts should be made to increase fruit production by enhancing shrubs at specific environmental conditions (age, elevation). Small cut-blocks near non-harvested pine seemed to be particularly beneficial for bears.
Language
English
DOI
doi:10.7939/R3K606
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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