气候变化领域集成服务门户(CCPortal): Grizzly bear selection of recently harvested forests is dependent on forest recovery rate and landscape composition

CCPortal

DOI	10.1016/j.foreco.2019.117459
	Grizzly bear selection of recently harvested forests is dependent on forest recovery rate and landscape composition
	Kearney S.P.; Coops N.C.; Stenhouse G.B.; Nielsen S.E.; Hermosilla T.; White J.C.; Wulder M.A.
发表日期	2019
ISSN	0378-1127
卷号	449
英文摘要	Forests in the early stages of regeneration are valuable habitat for threatened grizzly bear (Ursus arctos) populations inhabiting the interior mountains of North America, with forest management affecting the timing, prevalence, and quality of such habitats. Forest harvesting can lead to early-seral habitat, however the quality and duration of post-harvest habitat compared to natural disturbances (e.g., wildfire), is not known. North American silvicultural practices are mandated to ensure tree regrowth following harvesting, and a rapid rate of growth in managed tree regeneration may lead to a shorter time window during which attractive early-seral habitat is available to bears compared to natural forest disturbances. The distribution of natural disturbances across forested landscapes may also be an important consideration in the response of bears to forest harvesting. In this study, we analyzed grizzly bear habitat selection for 160 collared grizzly bears across 118,000-km2 (68% of their known habitat) in Alberta, Canada, using metrics of forest disturbance and recovery derived from a 33-year satellite time series. We developed seasonal resource selection functions to evaluate (1) if selection of recently harvested forests was contingent upon the availability of natural disturbances, (2) how habitat selection within disturbed areas varied across disturbance types, and (3) how habitat suitability changed over time during the first 30 years of forest recovery following various disturbance types. Results showed that, compared to areas not recently disturbed, grizzly bears were up to three times more likely to select for harvested forests when natural disturbances were limited in their home range, while selection of harvested forests was neutral when natural disturbances were abundant. When available, grizzly bears were more likely to select for natural disturbances compared to harvested locations, especially during Hypophagia (spring) and Hyperphagia (fall). Selection of harvested locations was inversely related to forest recovery assessed by spectral analysis and decreased sharply 15–20 years post-harvest, at which point it tended to be lower than pre-disturbance. This study demonstrates the utility of vegetation, disturbance, and recovery metrics derived from satellite time series for enriching our understanding of wildlife habitat selection in dynamic landscapes. Our results also have implications for forest management in regions where grizzly bear habitat availability and selection patterns are important. While rapid forest recovery following harvest is desirable and beneficial for a multitude of ecological and economic objectives, it appears to minimize the period of attractive early-seral habitat for grizzly bears. © 2019 Elsevier B.V.
英文关键词	Forest disturbance; Forest recovery; Habitat selection; Landsat; Spectral recovery; Time series; Ursus arctos
语种	英语
scopus关键词	Ecosystems; Harvesting; Recovery; Spectrum analysis; Time series; Forest disturbances; Forest recovery; Habitat selection; LANDSAT; Spectral recoveries; Ursus arctos; Reforestation; bear; disturbance; forest ecosystem; forestry practice; habitat availability; habitat selection; home range; Landsat; landscape; resource selection; seasonal variation; silviculture; spectral analysis; time series; Ecosystems; Forest Management; Forests; Harvesting; Recovery; Reforestation; Selection; Trees; Alberta; Canada; Ursus arctos
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155828
作者单位	University of British Columbia, Forest Resources Management, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; fRI Research, 1176 Switzer Drive, Hinton, AB T7V 1V3, Canada; University of Saskatchewan, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada; University of Alberta, 2-06 Agriculture Forestry Centre, Edmonton, AB T6G 2P5, Canada; Canadian Forest Service (Pacific Forestry Centre), Natural Resources Canada, 506 Burnside Road West, Victoria, BC V8Z 1M5, Canada
推荐引用方式 GB/T 7714	Kearney S.P.,Coops N.C.,Stenhouse G.B.,et al. Grizzly bear selection of recently harvested forests is dependent on forest recovery rate and landscape composition[J],2019,449.
APA	Kearney S.P..,Coops N.C..,Stenhouse G.B..,Nielsen S.E..,Hermosilla T..,...&Wulder M.A..(2019).Grizzly bear selection of recently harvested forests is dependent on forest recovery rate and landscape composition.Forest Ecology and Management,449.
MLA	Kearney S.P.,et al."Grizzly bear selection of recently harvested forests is dependent on forest recovery rate and landscape composition".Forest Ecology and Management 449(2019).