A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars.
The skeletal remains of a small bear (Protarctos abstrusus) were collected at theBeaver Pondfossil 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...
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2017
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ftcdlib:oai:escholarship.org:ark:/13030/qt35j6b058 2023-05-15T14:50:55+02:00 A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. Wang, Xiaoming Rybczynski, Natalia Harington, C Richard White, Stuart C Tedford, Richard H 17722 2017-12-01 application/pdf https://escholarship.org/uc/item/35j6b058 unknown eScholarship, University of California qt35j6b058 https://escholarship.org/uc/item/35j6b058 public Scientific reports, vol 7, iss 1 Dentition Animals Mammals Ursidae Dental Caries Diet Ecosystem Phylogeny Species Specificity Geography Fossils Arctic Regions Extinction Biological Nutrition article 2017 ftcdlib 2023-02-06T18:40:57Z The skeletal remains of a small bear (Protarctos abstrusus) were collected at theBeaver Pondfossil 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. Article in Journal/Newspaper Arctic Nunavut University of California: eScholarship Arctic Nunavut |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Dentition Animals Mammals Ursidae Dental Caries Diet Ecosystem Phylogeny Species Specificity Geography Fossils Arctic Regions Extinction Biological Nutrition |
spellingShingle |
Dentition Animals Mammals Ursidae Dental Caries Diet Ecosystem Phylogeny Species Specificity Geography Fossils Arctic Regions Extinction Biological Nutrition Wang, Xiaoming Rybczynski, Natalia Harington, C Richard White, Stuart C Tedford, Richard H A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
topic_facet |
Dentition Animals Mammals Ursidae Dental Caries Diet Ecosystem Phylogeny Species Specificity Geography Fossils Arctic Regions Extinction Biological Nutrition |
description |
The skeletal remains of a small bear (Protarctos abstrusus) were collected at theBeaver Pondfossil 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. |
format |
Article in Journal/Newspaper |
author |
Wang, Xiaoming Rybczynski, Natalia Harington, C Richard White, Stuart C Tedford, Richard H |
author_facet |
Wang, Xiaoming Rybczynski, Natalia Harington, C Richard White, Stuart C Tedford, Richard H |
author_sort |
Wang, Xiaoming |
title |
A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
title_short |
A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
title_full |
A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
title_fullStr |
A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
title_full_unstemmed |
A basal ursine bear (Protarctos abstrusus) from the Pliocene High Arctic reveals Eurasian affinities and a diet rich in fermentable sugars. |
title_sort |
basal ursine bear (protarctos abstrusus) from the pliocene high arctic reveals eurasian affinities and a diet rich in fermentable sugars. |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/35j6b058 |
op_coverage |
17722 |
geographic |
Arctic Nunavut |
geographic_facet |
Arctic Nunavut |
genre |
Arctic Nunavut |
genre_facet |
Arctic Nunavut |
op_source |
Scientific reports, vol 7, iss 1 |
op_relation |
qt35j6b058 https://escholarship.org/uc/item/35j6b058 |
op_rights |
public |
_version_ |
1766321975482908672 |