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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Axiom Data Science
2019
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Online Access: | https://dx.doi.org/10.24431/rw1k33d https://search.dataone.org/#view/10.24431/rw1k33d |
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ftdatacite:10.24431/rw1k33d 2023-05-15T15:43:44+02:00 Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 Newsome, Seth Lovvorn, James North, Christopher Lemons, Patrick 2019 https://dx.doi.org/10.24431/rw1k33d https://search.dataone.org/#view/10.24431/rw1k33d en eng Axiom Data Science dataset Dataset 2019 ftdatacite https://doi.org/10.24431/rw1k33d 2021-11-05T12:55:41Z 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 Bering Sea Chukchi Odobenus rosmarus Alaska walrus* DataCite Metadata Store (German National Library of Science and Technology) Bering Sea Lawrence Island ENVELOPE(-103.718,-103.718,56.967,56.967) Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
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 |
Newsome, Seth Lovvorn, James North, Christopher Lemons, Patrick |
spellingShingle |
Newsome, Seth Lovvorn, James North, Christopher Lemons, Patrick Retrospective Study of Walrus Foraging and Movement Patterns During a Major Ecosystem Shift in the Bering and Chukchi Seas, Alaska, 1950-2010 |
author_facet |
Newsome, Seth Lovvorn, James North, Christopher Lemons, Patrick |
author_sort |
Newsome, Seth |
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 |
Axiom Data Science |
publishDate |
2019 |
url |
https://dx.doi.org/10.24431/rw1k33d https://search.dataone.org/#view/10.24431/rw1k33d |
long_lat |
ENVELOPE(-103.718,-103.718,56.967,56.967) |
geographic |
Bering Sea Lawrence Island Pacific |
geographic_facet |
Bering Sea Lawrence Island Pacific |
genre |
Bering Sea Chukchi Odobenus rosmarus Alaska walrus* |
genre_facet |
Bering Sea Chukchi Odobenus rosmarus Alaska walrus* |
op_doi |
https://doi.org/10.24431/rw1k33d |
_version_ |
1766377938200035328 |