Landscape Evaluation of Grizzly Bear Habitat in Western Montana
Abstract: We present a method for evaluating the cumulative effects of human activity on grizzly bear ( Ursus arctos ) habitat in the Northern Continental Divide Ecosystem of western Montana. Using logistic regression, we modeled the relative probabilities of female grizzly bear resource selection f...
Published in: | Conservation Biology |
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Online Access: | http://dx.doi.org/10.1046/j.1523-1739.1999.013002367.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1523-1739.1999.013002367.x http://onlinelibrary.wiley.com/wol1/doi/10.1046/j.1523-1739.1999.013002367.x/fullpdf |
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crwiley:10.1046/j.1523-1739.1999.013002367.x 2024-06-02T08:15:37+00:00 Landscape Evaluation of Grizzly Bear Habitat in Western Montana Mace, Richard D. Waller, John S. Manley, Timothy L. Ake, Katherine Wittinger, William T. 1999 http://dx.doi.org/10.1046/j.1523-1739.1999.013002367.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1523-1739.1999.013002367.x http://onlinelibrary.wiley.com/wol1/doi/10.1046/j.1523-1739.1999.013002367.x/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Conservation Biology volume 13, issue 2, page 367-377 ISSN 0888-8892 1523-1739 journal-article 1999 crwiley https://doi.org/10.1046/j.1523-1739.1999.013002367.x 2024-05-03T10:40:47Z Abstract: We present a method for evaluating the cumulative effects of human activity on grizzly bear ( Ursus arctos ) habitat in the Northern Continental Divide Ecosystem of western Montana. Using logistic regression, we modeled the relative probabilities of female grizzly bear resource selection from telemetry data, TM satellite imagery (greenness), elevation, human activity points, roads, and trails. During spring, adult female grizzly bears were positively associated with low‐ and mid‐elevation habitats. Logistic regression coefficients were negative for all road and human activity variables. Summer and fall coefficients were also negative for road, human activity, and trail variables. During summer and fall, females were positively associated with mid to high elevations. Coefficients were positive for greenness during all seasons. Extrapolations of seasonal potential and realized habitat models were made to other areas on the western side of the region where no telemetry data existed. During spring, much of the Bob Marshall Wilderness exhibited a relatively low probability of use by female grizzly bears, but the converse was observed during summer and fall. The mapping and extrapolation process highlighted areas where habitat restoration would have the greatest benefit. These areas were typically low‐elevation spring habitats with high road densities and private lands where urbanization occurred. We recommend that habitat management agencies implement reductions in road densities in seasonal habitat and implement methods to maintain habitat function on private lands. Article in Journal/Newspaper Ursus arctos Wiley Online Library Conservation Biology 13 2 367 377 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract: We present a method for evaluating the cumulative effects of human activity on grizzly bear ( Ursus arctos ) habitat in the Northern Continental Divide Ecosystem of western Montana. Using logistic regression, we modeled the relative probabilities of female grizzly bear resource selection from telemetry data, TM satellite imagery (greenness), elevation, human activity points, roads, and trails. During spring, adult female grizzly bears were positively associated with low‐ and mid‐elevation habitats. Logistic regression coefficients were negative for all road and human activity variables. Summer and fall coefficients were also negative for road, human activity, and trail variables. During summer and fall, females were positively associated with mid to high elevations. Coefficients were positive for greenness during all seasons. Extrapolations of seasonal potential and realized habitat models were made to other areas on the western side of the region where no telemetry data existed. During spring, much of the Bob Marshall Wilderness exhibited a relatively low probability of use by female grizzly bears, but the converse was observed during summer and fall. The mapping and extrapolation process highlighted areas where habitat restoration would have the greatest benefit. These areas were typically low‐elevation spring habitats with high road densities and private lands where urbanization occurred. We recommend that habitat management agencies implement reductions in road densities in seasonal habitat and implement methods to maintain habitat function on private lands. |
format |
Article in Journal/Newspaper |
author |
Mace, Richard D. Waller, John S. Manley, Timothy L. Ake, Katherine Wittinger, William T. |
spellingShingle |
Mace, Richard D. Waller, John S. Manley, Timothy L. Ake, Katherine Wittinger, William T. Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
author_facet |
Mace, Richard D. Waller, John S. Manley, Timothy L. Ake, Katherine Wittinger, William T. |
author_sort |
Mace, Richard D. |
title |
Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
title_short |
Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
title_full |
Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
title_fullStr |
Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
title_full_unstemmed |
Landscape Evaluation of Grizzly Bear Habitat in Western Montana |
title_sort |
landscape evaluation of grizzly bear habitat in western montana |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1046/j.1523-1739.1999.013002367.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1523-1739.1999.013002367.x http://onlinelibrary.wiley.com/wol1/doi/10.1046/j.1523-1739.1999.013002367.x/fullpdf |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Conservation Biology volume 13, issue 2, page 367-377 ISSN 0888-8892 1523-1739 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1523-1739.1999.013002367.x |
container_title |
Conservation Biology |
container_volume |
13 |
container_issue |
2 |
container_start_page |
367 |
op_container_end_page |
377 |
_version_ |
1800739848583118848 |