دورية أكاديمية
أعرض في EDS

Steep and deep: Terrain and climate factors explain brown bear (Ursus arctos) alpine den site selection to guide heli-skiing management.

التفاصيل البيبلوغرافية
العنوان: Steep and deep: Terrain and climate factors explain brown bear (Ursus arctos) alpine den site selection to guide heli-skiing management.
المؤلفون: Crupi AP; Division of Wildlife Conservation, Alaska Department of Fish and Game, Douglas, Alaska, United States of America., Gregovich DP; Division of Wildlife Conservation, Alaska Department of Fish and Game, Douglas, Alaska, United States of America., White KS; Division of Wildlife Conservation, Alaska Department of Fish and Game, Douglas, Alaska, United States of America.
المصدر: PloS one [PLoS One] 2020 Sep 23; Vol. 15 (9), pp. e0238711. Date of Electronic Publication: 2020 Sep 23 (Print Publication: 2020).
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.
اللغة: English
بيانات الدورية: Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: eCollection Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
أسماء مطبوعة: Original Publication: San Francisco, CA : Public Library of Science
مواضيع طبية MeSH: Climate* , Ecosystem* , Skiing*, Ursidae/*physiology, Alaska ; Animals ; Confidence Intervals ; Geographic Information Systems ; Geography ; Models, Theoretical ; Risk Factors ; Surveys and Questionnaires
مستخلص: Winter recreation and tourism continue to expand worldwide, and where these activities overlap with valuable wildlife habitat, there is greater potential for conservation concerns. Wildlife populations can be particularly vulnerable to disturbance in alpine habitats as helicopters and snowmachines are increasingly used to access remote backcountry terrain. Brown bears (Ursus arctos) have adapted hibernation strategies to survive this period when resources and energy reserves are limited, and disturbance could negatively impact fitness and survival. To help identify areas of potential conflict between helicopter skiing and denning brown bears in Alaska, we developed a model to predict alpine denning habitat and an associated data-based framework for mitigating disturbance activities. Following den emergence in spring, we conducted three annual aerial surveys (2015-2017) and used locations from three GPS-collared bears (2008-2014) to identify 89 brown bear dens above the forest line. We evaluated brown bear den site selection of land cover, terrain, and climate factors using resource selection function (RSF) models. Our top model supported the hypothesis that bears selected dens based on terrain and climate factors that maximized thermal efficiency. Brown bears selected den sites characterized by steep slopes at moderate elevations in smooth, well-drained topographies that promoted vegetation and deep snow. We used the RSF model to map relative probability of den selection and found 85% of dens occurred within terrain predicted as prime denning habitat. Brown bear exposure to helicopter disturbance was evident as moderate to high intensities of helicopter flight tracking data overlapped prime denning habitat, and we quantified where the risk of these impact was greatest. We also documented evidence of late season den abandonment due to disturbance from helicopter skiing. The results from this study provide valuable insights into bear denning habitat requirements in subalpine and alpine landscapes. Our quantitative framework can be used to support conservation planning for winter recreation industries operating in habitats occupied by denning brown bears.
Competing Interests: The authors declare that no competing interests exist.
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سلسلة جزيئية: Dryad 10.5061/dryad.dr7sqv9vm
تواريخ الأحداث: Date Created: 20200923 Date Completed: 20201028 Latest Revision: 20240329
رمز التحديث: 20240329
مُعرف محوري في PubMed: PMC7511016
DOI: 10.1371/journal.pone.0238711
PMID: 32966287
قاعدة البيانات: MEDLINE
الوصف
تدمد:1932-6203
DOI:10.1371/journal.pone.0238711