Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica
Snow petrels (Pagodroma nivea) are endemic to Antarctica. Their feeding grounds are located within the pack ice or open waters of the Southern Ocean. They feed on fish, krill and squid with changing proportions depending on sea ice conditions. The birds breed in un-glaciated areas along the coast bu...
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ftawi:oai:epic.awi.de:46228 2024-09-15T17:47:09+00:00 Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica Berg, Sonja Melles, Martin Kuhn, Gerhard 2017-09 application/pdf https://epic.awi.de/id/eprint/46228/ https://epic.awi.de/id/eprint/46228/1/PAIS17_Berg2_1A.pdf https://hdl.handle.net/10013/epic.a34358da-6adb-4b59-87dd-45ecc6b5494e unknown SCAR https://epic.awi.de/id/eprint/46228/1/PAIS17_Berg2_1A.pdf Berg, S. , Melles, M. and Kuhn, G. orcid:0000-0001-6069-7485 (2017) Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica , Past Antarctic Ice Sheet Dynamics (PAIS) Conference, Trieste, 10 September 2017 - 15 September 2017 . hdl:10013/epic.a34358da-6adb-4b59-87dd-45ecc6b5494e EPIC3Past Antarctic Ice Sheet Dynamics (PAIS) Conference, Trieste, 2017-09-10-2017-09-15SCAR Conference notRev 2017 ftawi 2024-06-24T04:18:50Z Snow petrels (Pagodroma nivea) are endemic to Antarctica. Their feeding grounds are located within the pack ice or open waters of the Southern Ocean. They feed on fish, krill and squid with changing proportions depending on sea ice conditions. The birds breed in un-glaciated areas along the coast but also on inland nunataks and mountain ranges up to 440 km from the coast. Their nests are sheltered in rock cavities, which are defended by the petrels against potential intruders (e.g., competitors and Skuas) by ejecting proventricular stomach oil. The stomach oil accumulates and fossilizes around the breeding sites, thus forming centimetre to decimetre thick deposits of so-called Antarctic mumiyo. The distribution, age, and composition of the mumiyo deposits provide information concerning the environmental history at the breeding sites and potentially also on the sea-ice conditions of the adjacent ocean. The paleoenvironmental information concerns the position of marine and lacustrine shorelines, and the extent of glaciers or the ice sheet, since the nests only occur on dry and un-glaciated grounds. Information on the sea-ice history may be provided by biogeochemical proxies to be measured on the mumiyo, however, these proxies still need to be tested. First radiocarbon-dating of mumiyo deposits from mountain ranges in Dronning Maud Land was carried out by Hiller et al. (1995). The results indicated snow petrel occupation during the last glacial, however, with some question marks arising from poor temporal resolution due to the employment of conventional 14C dating only. Here, we present first combined 14C AMS, biomarker and inorganic geochemical data that were obtained on mumiyo deposits from Petermann Range, Dronning Maud Land. The mumyio shows a finely laminated internal structure. 14C ages indicate a consistent age-depth relation spanning from 17 ka to > 58 ka. These data confirm the existence of un-glaciated areas during the Last Glacial Maximum (LGM), as assumed by Hiller et al. (1995), and extend the ... Conference Object Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Sea ice Snow Petrel Snow Petrels Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Snow petrels (Pagodroma nivea) are endemic to Antarctica. Their feeding grounds are located within the pack ice or open waters of the Southern Ocean. They feed on fish, krill and squid with changing proportions depending on sea ice conditions. The birds breed in un-glaciated areas along the coast but also on inland nunataks and mountain ranges up to 440 km from the coast. Their nests are sheltered in rock cavities, which are defended by the petrels against potential intruders (e.g., competitors and Skuas) by ejecting proventricular stomach oil. The stomach oil accumulates and fossilizes around the breeding sites, thus forming centimetre to decimetre thick deposits of so-called Antarctic mumiyo. The distribution, age, and composition of the mumiyo deposits provide information concerning the environmental history at the breeding sites and potentially also on the sea-ice conditions of the adjacent ocean. The paleoenvironmental information concerns the position of marine and lacustrine shorelines, and the extent of glaciers or the ice sheet, since the nests only occur on dry and un-glaciated grounds. Information on the sea-ice history may be provided by biogeochemical proxies to be measured on the mumiyo, however, these proxies still need to be tested. First radiocarbon-dating of mumiyo deposits from mountain ranges in Dronning Maud Land was carried out by Hiller et al. (1995). The results indicated snow petrel occupation during the last glacial, however, with some question marks arising from poor temporal resolution due to the employment of conventional 14C dating only. Here, we present first combined 14C AMS, biomarker and inorganic geochemical data that were obtained on mumiyo deposits from Petermann Range, Dronning Maud Land. The mumyio shows a finely laminated internal structure. 14C ages indicate a consistent age-depth relation spanning from 17 ka to > 58 ka. These data confirm the existence of un-glaciated areas during the Last Glacial Maximum (LGM), as assumed by Hiller et al. (1995), and extend the ... |
format |
Conference Object |
author |
Berg, Sonja Melles, Martin Kuhn, Gerhard |
spellingShingle |
Berg, Sonja Melles, Martin Kuhn, Gerhard Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
author_facet |
Berg, Sonja Melles, Martin Kuhn, Gerhard |
author_sort |
Berg, Sonja |
title |
Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
title_short |
Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
title_full |
Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
title_fullStr |
Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
title_full_unstemmed |
Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica |
title_sort |
snow petrel stomach oil deposits ("antarctic mumiyo") as archives for the environmental history of terrestrial east antarctica |
publisher |
SCAR |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/46228/ https://epic.awi.de/id/eprint/46228/1/PAIS17_Berg2_1A.pdf https://hdl.handle.net/10013/epic.a34358da-6adb-4b59-87dd-45ecc6b5494e |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Sea ice Snow Petrel Snow Petrels Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Sea ice Snow Petrel Snow Petrels Southern Ocean |
op_source |
EPIC3Past Antarctic Ice Sheet Dynamics (PAIS) Conference, Trieste, 2017-09-10-2017-09-15SCAR |
op_relation |
https://epic.awi.de/id/eprint/46228/1/PAIS17_Berg2_1A.pdf Berg, S. , Melles, M. and Kuhn, G. orcid:0000-0001-6069-7485 (2017) Snow petrel stomach oil deposits ("Antarctic mumiyo") as archives for the environmental history of terrestrial East Antarctica , Past Antarctic Ice Sheet Dynamics (PAIS) Conference, Trieste, 10 September 2017 - 15 September 2017 . hdl:10013/epic.a34358da-6adb-4b59-87dd-45ecc6b5494e |
_version_ |
1810495864180834304 |