气候变化领域集成服务门户(CCPortal): Polar bear energetic and behavioral strategies on land with implications for surviving the ice-free period

CCPortal

DOI	10.1038/s41467-023-44682-1
	Polar bear energetic and behavioral strategies on land with implications for surviving the ice-free period
	Pagano, Anthony M.; Rode, Karyn D.; Lunn, Nicholas J.; Mcgeachy, David; Atkinson, Stephen N.; Farley, Sean D.; Erlenbach, Joy A.; Robbins, Charles T.
发表日期	2024
EISSN	2041-1723
起始页码	15
结束页码	1
卷号	15 期号:1
英文摘要	Declining Arctic sea ice is increasing polar bear land use. Polar bears on land are thought to minimize activity to conserve energy. Here, we measure the daily energy expenditure (DEE), diet, behavior, movement, and body composition changes of 20 different polar bears on land over 19-23 days from August to September (2019-2022) in Manitoba, Canada. Polar bears on land exhibited a 5.2-fold range in DEE and 19-fold range in activity, from hibernation-like DEEs to levels approaching active bears on the sea ice, including three individuals that made energetically demanding swims totaling 54-175 km. Bears consumed berries, vegetation, birds, bones, antlers, seal, and beluga. Beyond compensating for elevated DEE, there was little benefit from terrestrial foraging toward prolonging the predicted time to starvation, as 19 of 20 bears lost mass (0.4-1.7 kg center dot day-1). Although polar bears on land exhibit remarkable behavioral plasticity, our findings reinforce the risk of starvation, particularly in subadults, with forecasted increases in the onshore period. Declining Arctic sea ice is increasing polar bear land use. Here, the authors follow 20 different polar bears on land over 3 years and measure daily energy expenditure finding that despite behavioural and diet plasticity the bears are at risk of starvation.
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001161933400013
来源期刊	NATURE COMMUNICATIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297545
作者单位	United States Department of the Interior; United States Geological Survey; Environment & Climate Change Canada; Canadian Wildlife Service; Wildlife Research Division - Environment Canada; Alaska Department of Fish & Game; Washington State University; Washington State University; United States Department of the Interior; US Fish & Wildlife Service
推荐引用方式 GB/T 7714	Pagano, Anthony M.,Rode, Karyn D.,Lunn, Nicholas J.,et al. Polar bear energetic and behavioral strategies on land with implications for surviving the ice-free period[J],2024,15(1).
APA	Pagano, Anthony M..,Rode, Karyn D..,Lunn, Nicholas J..,Mcgeachy, David.,Atkinson, Stephen N..,...&Robbins, Charles T..(2024).Polar bear energetic and behavioral strategies on land with implications for surviving the ice-free period.NATURE COMMUNICATIONS,15(1).
MLA	Pagano, Anthony M.,et al."Polar bear energetic and behavioral strategies on land with implications for surviving the ice-free period".NATURE COMMUNICATIONS 15.1(2024).