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Optimizing Forest Harvests & Grizzly Bear (Ursus arctos horribilis) Habitat Open Access


Other title
Grizzly Bear
Forest Harvests
Type of item
Degree grantor
University of Alberta
Author or creator
Moradaoglu, Pembegul
Supervisor and department
Armstrong, Glen (Renewable Resources)
Examining committee member and department
Luckert, Martin (Resource Economics and Environmental Sociology)
Nielsen, Scott (Renewable Resources)
Armstrong, Glen (Renewable Resources)
Department of Renewable Resources
Forest Biology and Management
Date accepted
Graduation date
Master of Science
Degree level
West-central, Alberta is subject to a growing number of resource extraction activities such as forestry that change ecosystem components and their structure. This area is important for the grizzly bear (Ursus arctos horribilis) population, which is considered to be a threatened species in Alberta because of low population densities, habitat fragmentation and increasing human-caused bear mortalities. Forest managers are under pressure to conduct sustainable forest management while protecting the grizzly bear population, which requires the understanding of the effects of forest harvesting on the grizzly bear habitat, including availability of food resources. The goal of this thesis is to find management strategies, that provide efficient combinations of timber value and grizzly bear habitat. A linear programming technique was used to find harvest plans that maximize the production level of timber value subject to specified amounts of grizzly bear food items over a 200-year planning horizon. By finding harvesting plans for different amounts of grizzly bear food resources, a production possibility frontier was developed to examine trade-offs between timber management and occurrence of grizzly bear food resources that index habitat quality. Forest harvesting did negatively effect the occurrence of some grizzly bear food items. However, the occurrence of some of grizzly bear food items, such as huckleberry and clover, declined if there is no harvesting. By maintaining 90% of the grizzly bear food items, maximum timber production could still be obtained. Although the results are specific to west-central Alberta and for grizzly bears, the approach used can be generalized providing the model and structure for future analyses.
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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