Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions
Snow petrels (Pagodroma nivea), which are endemic to the Antarctic region, produce proventricular stomach oil from ingested food for feeding purposes but also spit the oil in the immediate surrounds of the nests, where it forms encrustations over time (Antarctic mumiyo). These deposits provide a uni...
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ftuhalleopendata:oai:opendata.uni-halle.de:1981185920/105404 2023-07-02T03:30:44+02:00 Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions Berg, S. Emmerson, L. Heim, C. Buchta, E. Fromm, T. Glaser, Bruno Hermichen, W.-D. Rethemeyer, J. Southwell, C. Wand, U. Zech, M. Melles, Martin 2023 application/pdf https://opendata.uni-halle.de//handle/1981185920/105404 https://doi.org/10.25673/103450 eng eng 1847529321 http://dx.doi.org/10.25673/103450 https://opendata.uni-halle.de//handle/1981185920/105404 https://creativecommons.org/licenses/by-nc-nd/4.0/ ddc:590 ddc:598 doc-type:article 2023 ftuhalleopendata https://doi.org/10.25673/103450 2023-06-11T22:28:46Z Snow petrels (Pagodroma nivea), which are endemic to the Antarctic region, produce proventricular stomach oil from ingested food for feeding purposes but also spit the oil in the immediate surrounds of the nests, where it forms encrustations over time (Antarctic mumiyo). These deposits provide a unique opportunity to understand the paleo-ecological diet of snow petrels and because the seabirds forage in the ocean, they potentially provide an archive of past marine environmental conditions in the Southern Ocean. For validating methods for reconstructions we use compositional data obtained on modern stomach oils and DNA data from fecal samples of snow petrels. We find that the distribution of carboxylic acid compounds in modern stomach oils and in the fossil deposits are consistent with variable contributions of fish and krill, which are the main constituents of modern snow petrel diet, and allows inference of past changes in snow petrel diet from the fossil record. Analyses of mumiyo deposits from six regions in East Antarctica reveal systematic differences in the isotopic composition of organic matter (δ13C and δ15N) and carboxylic acid patterns. This may suggest regional and/or temporal variability in the composition of snow petrels diet, likely differing in response to the prevailing environmental conditions in the foraging range of the birds, such as sea-ice variability, polynya activity and primary productivity. Our study provides confidence for using these approaches for broader scale paleo-studies in the future and for an assessment of the temporal changes and regional variability in snow petrel diet. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice Snow Petrel Snow Petrels Southern Ocean Share it - Open Access und Forschungsdaten-Repositorium der Hochschulbibliotheken in Sachsen-Anhalt Antarctic East Antarctica Nivea ENVELOPE(-45.479,-45.479,-60.580,-60.580) Southern Ocean Spit The ENVELOPE(-55.491,-55.491,-61.480,-61.480) The Antarctic |
institution |
Open Polar |
collection |
Share it - Open Access und Forschungsdaten-Repositorium der Hochschulbibliotheken in Sachsen-Anhalt |
op_collection_id |
ftuhalleopendata |
language |
English |
topic |
ddc:590 ddc:598 |
spellingShingle |
ddc:590 ddc:598 Berg, S. Emmerson, L. Heim, C. Buchta, E. Fromm, T. Glaser, Bruno Hermichen, W.-D. Rethemeyer, J. Southwell, C. Wand, U. Zech, M. Melles, Martin Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
topic_facet |
ddc:590 ddc:598 |
description |
Snow petrels (Pagodroma nivea), which are endemic to the Antarctic region, produce proventricular stomach oil from ingested food for feeding purposes but also spit the oil in the immediate surrounds of the nests, where it forms encrustations over time (Antarctic mumiyo). These deposits provide a unique opportunity to understand the paleo-ecological diet of snow petrels and because the seabirds forage in the ocean, they potentially provide an archive of past marine environmental conditions in the Southern Ocean. For validating methods for reconstructions we use compositional data obtained on modern stomach oils and DNA data from fecal samples of snow petrels. We find that the distribution of carboxylic acid compounds in modern stomach oils and in the fossil deposits are consistent with variable contributions of fish and krill, which are the main constituents of modern snow petrel diet, and allows inference of past changes in snow petrel diet from the fossil record. Analyses of mumiyo deposits from six regions in East Antarctica reveal systematic differences in the isotopic composition of organic matter (δ13C and δ15N) and carboxylic acid patterns. This may suggest regional and/or temporal variability in the composition of snow petrels diet, likely differing in response to the prevailing environmental conditions in the foraging range of the birds, such as sea-ice variability, polynya activity and primary productivity. Our study provides confidence for using these approaches for broader scale paleo-studies in the future and for an assessment of the temporal changes and regional variability in snow petrel diet. |
format |
Article in Journal/Newspaper |
author |
Berg, S. Emmerson, L. Heim, C. Buchta, E. Fromm, T. Glaser, Bruno Hermichen, W.-D. Rethemeyer, J. Southwell, C. Wand, U. Zech, M. Melles, Martin |
author_facet |
Berg, S. Emmerson, L. Heim, C. Buchta, E. Fromm, T. Glaser, Bruno Hermichen, W.-D. Rethemeyer, J. Southwell, C. Wand, U. Zech, M. Melles, Martin |
author_sort |
Berg, S. |
title |
Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
title_short |
Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
title_full |
Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
title_fullStr |
Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
title_full_unstemmed |
Reconstructing the paleo-ecological diet of snow petrels (Pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
title_sort |
reconstructing the paleo-ecological diet of snow petrels (pagodroma nivea) from modern samples and fossil deposits : implications for southern ocean paleoenvironmental reconstructions |
publishDate |
2023 |
url |
https://opendata.uni-halle.de//handle/1981185920/105404 https://doi.org/10.25673/103450 |
long_lat |
ENVELOPE(-45.479,-45.479,-60.580,-60.580) ENVELOPE(-55.491,-55.491,-61.480,-61.480) |
geographic |
Antarctic East Antarctica Nivea Southern Ocean Spit The The Antarctic |
geographic_facet |
Antarctic East Antarctica Nivea Southern Ocean Spit The The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice Snow Petrel Snow Petrels Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice Snow Petrel Snow Petrels Southern Ocean |
op_relation |
1847529321 http://dx.doi.org/10.25673/103450 https://opendata.uni-halle.de//handle/1981185920/105404 |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.25673/103450 |
_version_ |
1770275023979806720 |