Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica)
Adélie penguin (Pygoscelis adeliae) modern and fossil eggshells and guano samples collected from ornithogenic soils in Terra Nova Bay (Victoria Land, Ross Sea) were processed for carbon and nitrogen isotopic ratios with the aim of detecting past penguin dietary changes. A detailed and greatly expan...
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Online Access: | http://hdl.handle.net/11568/191907 https://doi.org/10.1007/s00442-010-1790-2 |
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ftunivpisairis:oai:arpi.unipi.it:11568/191907 2024-04-21T07:52:29+00:00 Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) Lorenzini S Fallick A. E Baneschi I Dallai L. BARONI, CARLO SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI Lorenzini, S Baroni, Carlo Fallick, A. E. Baneschi, I Salvatore, MARIA CRISTINA Zanchetta, Giovanni Dallai, L. 2010 STAMPA http://hdl.handle.net/11568/191907 https://doi.org/10.1007/s00442-010-1790-2 eng eng info:eu-repo/semantics/altIdentifier/pmid/20886238 info:eu-repo/semantics/altIdentifier/wos/WOS:000284271900007 volume:164 issue:4 firstpage:911 lastpage:919 numberofpages:9 journal:OECOLOGIA http://hdl.handle.net/11568/191907 doi:10.1007/s00442-010-1790-2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-78449233758 Adélie Penguin Paleodiet Relict colony Stable Isotope Holocene Ross Sea Antarctica info:eu-repo/semantics/article 2010 ftunivpisairis https://doi.org/10.1007/s00442-010-1790-2 2024-03-28T01:27:26Z Adélie penguin (Pygoscelis adeliae) modern and fossil eggshells and guano samples collected from ornithogenic soils in Terra Nova Bay (Victoria Land, Ross Sea) were processed for carbon and nitrogen isotopic ratios with the aim of detecting past penguin dietary changes. A detailed and greatly expanded Adélie penguin dietary record dated back to 7,200 years BP has been reconstructed for the investigated area. Our data indicate a signiWcant dietary shift between Wsh and krill, with a gradual decrease from past to present time in the proportion of Wsh compared to krill in Adélie penguin diet. From 7,200 to 2,000 years BP, delta13C and delta15N values indicate Wsh as the most eaten prey. The dietary contribution of lower-trophic prey in penguin diet started becoming evident not earlier than 2,000 years BP, when the 13C values reveal a change in the penguin feeding behavior. Modern eggshell and guano samples reveal a major dietary contribution of krill but not a krill-dominated diet, since 13C values remain much too high if krill prevail in the diet. According to the Holocene environmental background attested for Victoria Land, Adélie penguin dietary shifts between Wsh and krill seem to reflect penguin paleoecological responses to diVerent paleoenvironmental settings with diVerent conditions of sea-ice extension and persistence. Furthermore, Adélie penguin diet appears to be particularly aVected by environmental changes in a very specific period within the breeding season, namely the egg-laying period when penguin dietary and feeding habit shifts are clearly documented by the delta 13C of eggshell carbonate. Article in Journal/Newspaper Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Oecologia 164 4 911 919 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Adélie Penguin Paleodiet Relict colony Stable Isotope Holocene Ross Sea Antarctica |
spellingShingle |
Adélie Penguin Paleodiet Relict colony Stable Isotope Holocene Ross Sea Antarctica Lorenzini S Fallick A. E Baneschi I Dallai L. BARONI, CARLO SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
topic_facet |
Adélie Penguin Paleodiet Relict colony Stable Isotope Holocene Ross Sea Antarctica |
description |
Adélie penguin (Pygoscelis adeliae) modern and fossil eggshells and guano samples collected from ornithogenic soils in Terra Nova Bay (Victoria Land, Ross Sea) were processed for carbon and nitrogen isotopic ratios with the aim of detecting past penguin dietary changes. A detailed and greatly expanded Adélie penguin dietary record dated back to 7,200 years BP has been reconstructed for the investigated area. Our data indicate a signiWcant dietary shift between Wsh and krill, with a gradual decrease from past to present time in the proportion of Wsh compared to krill in Adélie penguin diet. From 7,200 to 2,000 years BP, delta13C and delta15N values indicate Wsh as the most eaten prey. The dietary contribution of lower-trophic prey in penguin diet started becoming evident not earlier than 2,000 years BP, when the 13C values reveal a change in the penguin feeding behavior. Modern eggshell and guano samples reveal a major dietary contribution of krill but not a krill-dominated diet, since 13C values remain much too high if krill prevail in the diet. According to the Holocene environmental background attested for Victoria Land, Adélie penguin dietary shifts between Wsh and krill seem to reflect penguin paleoecological responses to diVerent paleoenvironmental settings with diVerent conditions of sea-ice extension and persistence. Furthermore, Adélie penguin diet appears to be particularly aVected by environmental changes in a very specific period within the breeding season, namely the egg-laying period when penguin dietary and feeding habit shifts are clearly documented by the delta 13C of eggshell carbonate. |
author2 |
Lorenzini, S Baroni, Carlo Fallick, A. E. Baneschi, I Salvatore, MARIA CRISTINA Zanchetta, Giovanni Dallai, L. |
format |
Article in Journal/Newspaper |
author |
Lorenzini S Fallick A. E Baneschi I Dallai L. BARONI, CARLO SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI |
author_facet |
Lorenzini S Fallick A. E Baneschi I Dallai L. BARONI, CARLO SALVATORE, MARIA CRISTINA ZANCHETTA, GIOVANNI |
author_sort |
Lorenzini S |
title |
Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
title_short |
Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
title_full |
Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
title_fullStr |
Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
title_full_unstemmed |
Stable isotopes reveal Holocene changes in the diet of Adélie penguins in Northern Victoria Land (Ross Sea, Antarctica) |
title_sort |
stable isotopes reveal holocene changes in the diet of adélie penguins in northern victoria land (ross sea, antarctica) |
publishDate |
2010 |
url |
http://hdl.handle.net/11568/191907 https://doi.org/10.1007/s00442-010-1790-2 |
genre |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice Victoria Land |
genre_facet |
Antarc* Antarctica Pygoscelis adeliae Ross Sea Sea ice Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/20886238 info:eu-repo/semantics/altIdentifier/wos/WOS:000284271900007 volume:164 issue:4 firstpage:911 lastpage:919 numberofpages:9 journal:OECOLOGIA http://hdl.handle.net/11568/191907 doi:10.1007/s00442-010-1790-2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-78449233758 |
op_doi |
https://doi.org/10.1007/s00442-010-1790-2 |
container_title |
Oecologia |
container_volume |
164 |
container_issue |
4 |
container_start_page |
911 |
op_container_end_page |
919 |
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1796935703345496064 |