Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells.
An oxygen isotope record of Adélie penguin (Pygoscelis adeliae) eggshells from Terra Nova Bay (Victoria Land, Antarctica) has been reconstructed in order to provide insights into the palaeoenviroment of this region during the last ~8000 years. The δ18O values measured in eggshell carbonate show a g...
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ftunivpisairis:oai:arpi.unipi.it:11568/199686 2024-04-21T07:52:48+00:00 Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. LORENZINI S. BANESCHI I. FALLICK A. E DALLAI L. SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI BARONI, CARLO Lorenzini, S. Baneschi, I. Fallick, A. E. Salvatore, MARIA CRISTINA Zanchetta, Giovanni Dallai, L. Baroni, Carlo 2012 STAMPA http://hdl.handle.net/11568/199686 eng eng info:eu-repo/semantics/altIdentifier/wos/000298353900007 volume:22 issue:1 firstpage:63 lastpage:69 numberofpages:7 journal:THE HOLOCENE http://hdl.handle.net/11568/199686 10.1177/ 0959683611409773 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84055178642 Adélie penguin Antarctica Holocene oxygen isotope palaeoenvironment info:eu-repo/semantics/article 2012 ftunivpisairis 2024-03-28T01:28:08Z An oxygen isotope record of Adélie penguin (Pygoscelis adeliae) eggshells from Terra Nova Bay (Victoria Land, Antarctica) has been reconstructed in order to provide insights into the palaeoenviroment of this region during the last ~8000 years. The δ18O values measured in eggshell carbonate show a great variability over the course of the studied period, with maximum values consistently around +27.5‰. Adopting a metabolic enrichment relative to water source of ~+28.5‰, eggshell δ18O values can be interpreted in terms of marine water uptake by the penguins. The spread in δ18O of eggshell carbonate at any given time toward more negative values reflects the existence of a low δ18O water end member, most plausibly snow or snowmelt. Samples younger than 2000 years are characterized by a general lack of very negative δ18O values. As also attested by other proxies, this shift toward more positive isotopic values is likely to be related both to a decreasing contribution of snow or meltwater in the seawaters and consequently to an absence or paucity on the boundary of the nesting sites of snow or snowfall and freshwater that could be directly eaten or drunk by penguins. Article in Journal/Newspaper Antarc* Antarctica Pygoscelis adeliae Ross Sea Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Adélie penguin Antarctica Holocene oxygen isotope palaeoenvironment |
spellingShingle |
Adélie penguin Antarctica Holocene oxygen isotope palaeoenvironment LORENZINI S. BANESCHI I. FALLICK A. E DALLAI L. SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI BARONI, CARLO Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
topic_facet |
Adélie penguin Antarctica Holocene oxygen isotope palaeoenvironment |
description |
An oxygen isotope record of Adélie penguin (Pygoscelis adeliae) eggshells from Terra Nova Bay (Victoria Land, Antarctica) has been reconstructed in order to provide insights into the palaeoenviroment of this region during the last ~8000 years. The δ18O values measured in eggshell carbonate show a great variability over the course of the studied period, with maximum values consistently around +27.5‰. Adopting a metabolic enrichment relative to water source of ~+28.5‰, eggshell δ18O values can be interpreted in terms of marine water uptake by the penguins. The spread in δ18O of eggshell carbonate at any given time toward more negative values reflects the existence of a low δ18O water end member, most plausibly snow or snowmelt. Samples younger than 2000 years are characterized by a general lack of very negative δ18O values. As also attested by other proxies, this shift toward more positive isotopic values is likely to be related both to a decreasing contribution of snow or meltwater in the seawaters and consequently to an absence or paucity on the boundary of the nesting sites of snow or snowfall and freshwater that could be directly eaten or drunk by penguins. |
author2 |
Lorenzini, S. Baneschi, I. Fallick, A. E. Salvatore, MARIA CRISTINA Zanchetta, Giovanni Dallai, L. Baroni, Carlo |
format |
Article in Journal/Newspaper |
author |
LORENZINI S. BANESCHI I. FALLICK A. E DALLAI L. SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI BARONI, CARLO |
author_facet |
LORENZINI S. BANESCHI I. FALLICK A. E DALLAI L. SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI BARONI, CARLO |
author_sort |
LORENZINI S. |
title |
Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
title_short |
Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
title_full |
Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
title_fullStr |
Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
title_full_unstemmed |
Insights into the Holocene environmental setting of Terra Nova Bay region (Ross Sea, Antarctica) from oxygen isotope geochemistry of Adélie penguin eggshells. |
title_sort |
insights into the holocene environmental setting of terra nova bay region (ross sea, antarctica) from oxygen isotope geochemistry of adélie penguin eggshells. |
publishDate |
2012 |
url |
http://hdl.handle.net/11568/199686 |
genre |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000298353900007 volume:22 issue:1 firstpage:63 lastpage:69 numberofpages:7 journal:THE HOLOCENE http://hdl.handle.net/11568/199686 10.1177/ 0959683611409773 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84055178642 |
_version_ |
1796936018626084864 |