Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada
Bibliography: p. 209-254 Some pages are in colour. This study investigated the effects of human land-use on grizzly bear (Ursus arctos L.) habitat and populations in the Kluane region of southwest Yukon, Canada. Previous studies in the region identify grizzlies as the species most at risk from cumul...
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Environmental Design
2007
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Online Access: | http://hdl.handle.net/1880/102032 https://doi.org/10.11575/PRISM/1031 |
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ftunivcalgary:oai:prism.ucalgary.ca:1880/102032 2023-08-27T04:12:27+02:00 Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada Maraj, Ramona Gates, Cormack 2007 xxxiii, 259 leaves : ill. 30 cm. application/pdf http://hdl.handle.net/1880/102032 https://doi.org/10.11575/PRISM/1031 eng eng Environmental Design University of Calgary Calgary Maraj, R. (2007). Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada (Unpublished doctoral thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/1031 http://dx.doi.org/10.11575/PRISM/1031 http://hdl.handle.net/1880/102032 University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. doctoral thesis 2007 ftunivcalgary https://doi.org/10.11575/PRISM/1031 2023-08-06T06:25:07Z Bibliography: p. 209-254 Some pages are in colour. This study investigated the effects of human land-use on grizzly bear (Ursus arctos L.) habitat and populations in the Kluane region of southwest Yukon, Canada. Previous studies in the region identify grizzlies as the species most at risk from cumulative impacts of human activity . The goals of this project were to: 1) identify the effects of cumulative human activities on grizzly habitat and populations; and 2) provide recommendations on human-use management with respect to the conservation of grizzlies and their habitat. Thus , I investigated three aspects of bear ecology and synthesized them to examine the influence of human-activities on bears. First, I examined the appropriateness of using Tasselled Cap Transformation variables for representing the distribution of bear forage. Tasselled Cap layers correlated with aggregate measures of forage abundance, provided continuous variables for linear occupancy estimation models, and were more cost-effective to produce than land cover classifications . I then tested the influence of conspecific distribution on habitat selection by grizzly bear sex/age cohorts . Family groups segregated from other cohorts, in part, to avoid intra-specific aggression and to protect cubs. Segregation also occurred because of differential response by each cohort to the distribution of human activity, and the distribution of forage. I next examined the temporal trends and spatial characteristics of grizzly bear mortality in Kluane. While efforts reduced the frequency of occurrences and management-related mortalities, there was a substantial lag between the management efforts and the decline of human bear interactions and human-caused bear mortalities. Increased human activity in the region may have negated the positive effects of landfill closures. Finally , to examine the influence habitat and mortality models had on grizzly bear productivity and survival, I compared the explanatory power of empirical habitat models based on grizzly ... Doctoral or Postdoctoral Thesis Ursus arctos Yukon PRISM - University of Calgary Digital Repository Canada Yukon |
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English |
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Bibliography: p. 209-254 Some pages are in colour. This study investigated the effects of human land-use on grizzly bear (Ursus arctos L.) habitat and populations in the Kluane region of southwest Yukon, Canada. Previous studies in the region identify grizzlies as the species most at risk from cumulative impacts of human activity . The goals of this project were to: 1) identify the effects of cumulative human activities on grizzly habitat and populations; and 2) provide recommendations on human-use management with respect to the conservation of grizzlies and their habitat. Thus , I investigated three aspects of bear ecology and synthesized them to examine the influence of human-activities on bears. First, I examined the appropriateness of using Tasselled Cap Transformation variables for representing the distribution of bear forage. Tasselled Cap layers correlated with aggregate measures of forage abundance, provided continuous variables for linear occupancy estimation models, and were more cost-effective to produce than land cover classifications . I then tested the influence of conspecific distribution on habitat selection by grizzly bear sex/age cohorts . Family groups segregated from other cohorts, in part, to avoid intra-specific aggression and to protect cubs. Segregation also occurred because of differential response by each cohort to the distribution of human activity, and the distribution of forage. I next examined the temporal trends and spatial characteristics of grizzly bear mortality in Kluane. While efforts reduced the frequency of occurrences and management-related mortalities, there was a substantial lag between the management efforts and the decline of human bear interactions and human-caused bear mortalities. Increased human activity in the region may have negated the positive effects of landfill closures. Finally , to examine the influence habitat and mortality models had on grizzly bear productivity and survival, I compared the explanatory power of empirical habitat models based on grizzly ... |
author2 |
Gates, Cormack |
format |
Doctoral or Postdoctoral Thesis |
author |
Maraj, Ramona |
spellingShingle |
Maraj, Ramona Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
author_facet |
Maraj, Ramona |
author_sort |
Maraj, Ramona |
title |
Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
title_short |
Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
title_full |
Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
title_fullStr |
Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
title_full_unstemmed |
Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada |
title_sort |
evaluating the ecological consequences of human land-use on grizzly bears in southwest yukon, canada |
publisher |
Environmental Design |
publishDate |
2007 |
url |
http://hdl.handle.net/1880/102032 https://doi.org/10.11575/PRISM/1031 |
geographic |
Canada Yukon |
geographic_facet |
Canada Yukon |
genre |
Ursus arctos Yukon |
genre_facet |
Ursus arctos Yukon |
op_relation |
Maraj, R. (2007). Evaluating the ecological consequences of human land-use on grizzly bears in southwest Yukon, Canada (Unpublished doctoral thesis). University of Calgary, Calgary, AB. doi:10.11575/PRISM/1031 http://dx.doi.org/10.11575/PRISM/1031 http://hdl.handle.net/1880/102032 |
op_rights |
University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. |
op_doi |
https://doi.org/10.11575/PRISM/1031 |
_version_ |
1775356607244271616 |