A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars

doi:10.1038/s41598-017-17657-8

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	A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars
	Wang, Xiaoming 1,2,3; Rybczynski, Natalia 4,5,6; Harington, C. Richard 4; White, Stuart C.7; Tedford, Richard H.3
刊名	SCIENTIFIC REPORTS
	2017-12-18
卷号	7
DOI	10.1038/s41598-017-17657-8
文献子类	Article
英文摘要	The skeletal remains of a small bear (Protarctos abstrusus) were collected at the Beaver Pond fossil site in the High Arctic (Ellesmere I., Nunavut). This mid-Pliocene deposit has also yielded 12 other mammals and the remains of a boreal-forest community. Phylogenetic analysis reveals this bear to be basal to modern bears. It appears to represent an immigration event from Asia, leaving no living North American descendants. The dentition shows only modest specialization for herbivory, consistent with its basal position within Ursinae. However, the appearance of dental caries suggest a diet high in fermentable-carbohydrates. Fossil plants remains, including diverse berries, suggests that, like modern northern black bears, P. abstrusus may have exploited a high-sugar diet in the fall to promote fat accumulation and facilitate hibernation. A tendency toward a sugar-rich diet appears to have arisen early in Ursinae, and may have played a role in allowing ursine lineages to occupy cold habitats.
WOS关键词	NORTH-AMERICA ; BLACK BEARS ; GENE FLOW ; CARIES ; PROGRAM ; MAMMALS ; URSUS
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000418323900034
资助机构	Canadian Museum of Nature ; Canadian Polar Continental Shelf Program ; Garfield Weston Foundation ; National Science Foundation(EAR-0958704)
内容类型	期刊论文
源URL	[http://124.16.247.212/handle/311034/8064]
专题	古脊椎动物与古人类研究所_图书馆1
作者单位	1.Nat Hist Museum Los Angeles Cty, Dept Vertebrate Paleontol, 900 Exposit Blvd, Los Angeles, CA 90007 USA 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Amer Museum Nat Hist, Div Paleontol, Cent Pk West & 79th St, New York, NY 10024 USA 4.Canadian Museum Nat, Palaeobiol, POB 3443 STN D, Ottawa, ON K1P 6P4, Canada 5.Carleton Univ, Dept Biol, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada 6.Carleton Univ, Dept Earth Sci, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada 7.Univ Calif Los Angeles, Sch Dent, 10833 Le Conte Ave, Los Angeles, CA 90095 USA
推荐引用方式 GB/T 7714	Wang, Xiaoming,Rybczynski, Natalia,Harington, C. Richard,et al. A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars[J]. SCIENTIFIC REPORTS,2017,7.
APA	Wang, Xiaoming,Rybczynski, Natalia,Harington, C. Richard,White, Stuart C.,&Tedford, Richard H..(2017).A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars.SCIENTIFIC REPORTS,7.
MLA	Wang, Xiaoming,et al."A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars".SCIENTIFIC REPORTS 7(2017).