Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen
Changes in primary ocean productivity play a key role in determining the structure and biomass yield of the North Pacific ecosystem. Archaeofaunal remains of marine mammals from the Aleutian Islands, Alaska were used as a proxy for marine productivity changes over decade, century and millennial scal...
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ftnsoutheastern:oai:nsuworks.nova.edu:occ_facpresentations-1366 2023-05-15T18:48:56+02:00 Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen Hirons, Amy Knecht, Richard Potter, Charles W. Gomez, Jonathan 2014-08-08T07:00:00Z https://nsuworks.nova.edu/occ_facpresentations/317 unknown NSUWorks https://nsuworks.nova.edu/occ_facpresentations/317 Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures Marine Biology Oceanography and Atmospheric Sciences and Meteorology conference 2014 ftnsoutheastern 2022-04-10T21:35:41Z Changes in primary ocean productivity play a key role in determining the structure and biomass yield of the North Pacific ecosystem. Archaeofaunal remains of marine mammals from the Aleutian Islands, Alaska were used as a proxy for marine productivity changes over decade, century and millennial scales throughout the Holocene. Marine vertebrate remains from several previously excavated, well-dated archaeological deposits on Unalaska Island span the period AD 1912-5500 BP. Stable carbon and nitrogen isotope ratios (δ13C and δ15N) derived from marine mammal bone and tooth collagen provide information about changes in food web dynamics and marine productivity levels and, through inference, about ecosystem changes. The paleorecord of phytoplankton production, in response to changes in atmospheric and oceanic fluctuations, is reflected in the stable isotope composition of the skeletal remains of these animals. An analysis of three hundred pinniped and cetacean individuals over the six thousand year period indicated a consistent inverse relationship existed between the two isotopes. A minimum of five time periods occurred when both stable isotopes changed from either a positive to negative slope or negative to positive slope. Conference Object Alaska Aleutian Islands Nova Southeastern University: NSU Works Pacific |
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Open Polar |
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Nova Southeastern University: NSU Works |
op_collection_id |
ftnsoutheastern |
language |
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topic |
Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Marine Biology Oceanography and Atmospheric Sciences and Meteorology Hirons, Amy Knecht, Richard Potter, Charles W. Gomez, Jonathan Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
topic_facet |
Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
description |
Changes in primary ocean productivity play a key role in determining the structure and biomass yield of the North Pacific ecosystem. Archaeofaunal remains of marine mammals from the Aleutian Islands, Alaska were used as a proxy for marine productivity changes over decade, century and millennial scales throughout the Holocene. Marine vertebrate remains from several previously excavated, well-dated archaeological deposits on Unalaska Island span the period AD 1912-5500 BP. Stable carbon and nitrogen isotope ratios (δ13C and δ15N) derived from marine mammal bone and tooth collagen provide information about changes in food web dynamics and marine productivity levels and, through inference, about ecosystem changes. The paleorecord of phytoplankton production, in response to changes in atmospheric and oceanic fluctuations, is reflected in the stable isotope composition of the skeletal remains of these animals. An analysis of three hundred pinniped and cetacean individuals over the six thousand year period indicated a consistent inverse relationship existed between the two isotopes. A minimum of five time periods occurred when both stable isotopes changed from either a positive to negative slope or negative to positive slope. |
format |
Conference Object |
author |
Hirons, Amy Knecht, Richard Potter, Charles W. Gomez, Jonathan |
author_facet |
Hirons, Amy Knecht, Richard Potter, Charles W. Gomez, Jonathan |
author_sort |
Hirons, Amy |
title |
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
title_short |
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
title_full |
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
title_fullStr |
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
title_full_unstemmed |
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen |
title_sort |
paleoceanographic productivity reconstructions using marine mammal bone collagen |
publisher |
NSUWorks |
publishDate |
2014 |
url |
https://nsuworks.nova.edu/occ_facpresentations/317 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_source |
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures |
op_relation |
https://nsuworks.nova.edu/occ_facpresentations/317 |
_version_ |
1766242304406847488 |