Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010
This study developed a historic ~50-year time series of carbon (δ13C) and nitrogen (δ15N) isotope values with annual resolution to test the hypothesis about whether northward shift of benthic ecosystems is influencing walrus movement and diet, as well as the ecology of other benthic predators. Colle...
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dataone:10.24431_rw1k33d_20191220195210 2024-06-03T18:46:41+00:00 Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 Seth Newsome James Lovvorn Christopher North Patrick Lemons BEGINDATE: 1950-01-01T07:00:00Z ENDDATE: 2010-01-01T07:00:00Z 2012-07-30T00:00:00Z https://search.dataone.org/view/10.24431_rw1k33d_20191220195210 unknown Research Workspace OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA Odobenus rosmarus morse, Walrus 1950-2010 walrus Pacific walrus stable isotope North Pacific Research Board Chukchi Sea Pacific walrus stable isotope analysis Odobenus rosmarus divergens Tooth Dentin Historic Ecology Dataset 2012 dataone:urn:node:RW 2024-06-03T18:16:05Z This study developed a historic ~50-year time series of carbon (δ13C) and nitrogen (δ15N) isotope values with annual resolution to test the hypothesis about whether northward shift of benthic ecosystems is influencing walrus movement and diet, as well as the ecology of other benthic predators. Collected and archived Pacific walrus (Odobenus rosmarus divergens) teeth (lower canines) during subsistence harvests on Saint Lawrence Island. All teeth were originally collected from Native subsistence harvested animals except for one set of teeth collected in the Bering Sea during a research cruise conducted in 1981. Age via cementum annuli counts were estimated and targeted teeth from younger animals (<15 years old). Teeth were recovered from collections made between 1960-2012. This dataset contains the estimated age and tooth dentin carbon (δ13C) and nitrogen (δ15N) isotope values of male and female walrus collected over the past ~50 years from subsistence harvests. Dataset Arctic Arctic Ocean Bering Sea Chukchi Chukchi Sea Odobenus rosmarus Alaska morse walrus* Research Workspace (via DataONE) Arctic Arctic Ocean Bering Sea Chukchi Sea Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) Morse ENVELOPE(130.167,130.167,-66.250,-66.250) Pacific |
institution |
Open Polar |
collection |
Research Workspace (via DataONE) |
op_collection_id |
dataone:urn:node:RW |
language |
unknown |
topic |
OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA Odobenus rosmarus morse, Walrus 1950-2010 walrus Pacific walrus stable isotope North Pacific Research Board Chukchi Sea Pacific walrus stable isotope analysis Odobenus rosmarus divergens Tooth Dentin Historic Ecology |
spellingShingle |
OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA Odobenus rosmarus morse, Walrus 1950-2010 walrus Pacific walrus stable isotope North Pacific Research Board Chukchi Sea Pacific walrus stable isotope analysis Odobenus rosmarus divergens Tooth Dentin Historic Ecology Seth Newsome James Lovvorn Christopher North Patrick Lemons Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
topic_facet |
OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA Odobenus rosmarus morse, Walrus 1950-2010 walrus Pacific walrus stable isotope North Pacific Research Board Chukchi Sea Pacific walrus stable isotope analysis Odobenus rosmarus divergens Tooth Dentin Historic Ecology |
description |
This study developed a historic ~50-year time series of carbon (δ13C) and nitrogen (δ15N) isotope values with annual resolution to test the hypothesis about whether northward shift of benthic ecosystems is influencing walrus movement and diet, as well as the ecology of other benthic predators. Collected and archived Pacific walrus (Odobenus rosmarus divergens) teeth (lower canines) during subsistence harvests on Saint Lawrence Island. All teeth were originally collected from Native subsistence harvested animals except for one set of teeth collected in the Bering Sea during a research cruise conducted in 1981. Age via cementum annuli counts were estimated and targeted teeth from younger animals (<15 years old). Teeth were recovered from collections made between 1960-2012. This dataset contains the estimated age and tooth dentin carbon (δ13C) and nitrogen (δ15N) isotope values of male and female walrus collected over the past ~50 years from subsistence harvests. |
format |
Dataset |
author |
Seth Newsome James Lovvorn Christopher North Patrick Lemons |
author_facet |
Seth Newsome James Lovvorn Christopher North Patrick Lemons |
author_sort |
Seth Newsome |
title |
Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
title_short |
Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
title_full |
Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
title_fullStr |
Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
title_full_unstemmed |
Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
title_sort |
retrospective study of walrus foraging and movement patterns during a major ecosystem shift in the bering and chukchi seas, alaska, 1950-2010 |
publisher |
Research Workspace |
publishDate |
2012 |
url |
https://search.dataone.org/view/10.24431_rw1k33d_20191220195210 |
op_coverage |
BEGINDATE: 1950-01-01T07:00:00Z ENDDATE: 2010-01-01T07:00:00Z |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) ENVELOPE(130.167,130.167,-66.250,-66.250) |
geographic |
Arctic Arctic Ocean Bering Sea Chukchi Sea Lawrence Island Morse Pacific |
geographic_facet |
Arctic Arctic Ocean Bering Sea Chukchi Sea Lawrence Island Morse Pacific |
genre |
Arctic Arctic Ocean Bering Sea Chukchi Chukchi Sea Odobenus rosmarus Alaska morse walrus* |
genre_facet |
Arctic Arctic Ocean Bering Sea Chukchi Chukchi Sea Odobenus rosmarus Alaska morse walrus* |
_version_ |
1800869688057528320 |