Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
We excavated active and abandoned Adelie Penguin ( Pygoscelis adeliae ) colonies at Seymour Island and Hope Bay, Antarctic Peninsula, to determine an occupation history for this species at these sites. Previous research at Hope Bay has indicated an occupation there since the middle Holocene, based o...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/140061 2023-05-15T13:04:45+02:00 Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula Emslie, Steven D. McKenzie, Ashley Marti, Lucas J. Santos, María Mercedes 2018-01 application/pdf 71-77 http://sedici.unlp.edu.ar/handle/10915/140061 en eng http://sedici.unlp.edu.ar/handle/10915/140061 issn:0722-4060 issn:1432-2056 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Ciencias Naturales Adélie Penguin Occupation history Ornithogenic soils Hope Bay Seymour Island Articulo 2018 ftunivlaplata 2022-08-07T00:06:36Z We excavated active and abandoned Adelie Penguin ( Pygoscelis adeliae ) colonies at Seymour Island and Hope Bay, Antarctic Peninsula, to determine an occupation history for this species at these sites. Previous research at Hope Bay has indicated an occupation there since the middle Holocene, based on a sediment record from Lake Boeckella. Excavations revealed only shallow and relatively fresh ornithogenic soils in the active colonies at the two localities. At least 53 abandoned pebble mounds were located at Hope Bay of which nine were excavated and four were sampled by probing to recover organic remains to determine their age. Radiocarbon dating of egg membrane, feather, and bone from both sites revealed a young occupation dating to less than ~600 years after correcting for the marine carbon reservoir effect. The mismatch in the geologic record of Adelie Penguin occupation in the northern Antarctic Peninsula, including Lake Boeckella sediments and geologic deposits and lake sediments on King George Island, with more direct evidence of breeding colonies from ornithogenic soils from active and abandoned colonies is hereby referred to as the ‘northern enigma’ as it does not occur in other regions of Antarctica including the southern Antarctic Peninsula, East Antarctica, or the Ross Sea, where the penguin record extends to the early to middle Holocene and matches well with the geologic record of deglaciation and penguin occupation. As yet, there is no convincing explanation for the ‘northern enigma’. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Adelie penguin Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica King George Island Pygoscelis adeliae Ross Sea Seymour Island Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic Antarctic Peninsula Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) East Antarctica Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) King George Island Lake Boeckella ENVELOPE(-57.000,-57.000,-63.400,-63.400) Ross Sea Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) The Antarctic |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Ciencias Naturales Adélie Penguin Occupation history Ornithogenic soils Hope Bay Seymour Island |
spellingShingle |
Ciencias Naturales Adélie Penguin Occupation history Ornithogenic soils Hope Bay Seymour Island Emslie, Steven D. McKenzie, Ashley Marti, Lucas J. Santos, María Mercedes Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
topic_facet |
Ciencias Naturales Adélie Penguin Occupation history Ornithogenic soils Hope Bay Seymour Island |
description |
We excavated active and abandoned Adelie Penguin ( Pygoscelis adeliae ) colonies at Seymour Island and Hope Bay, Antarctic Peninsula, to determine an occupation history for this species at these sites. Previous research at Hope Bay has indicated an occupation there since the middle Holocene, based on a sediment record from Lake Boeckella. Excavations revealed only shallow and relatively fresh ornithogenic soils in the active colonies at the two localities. At least 53 abandoned pebble mounds were located at Hope Bay of which nine were excavated and four were sampled by probing to recover organic remains to determine their age. Radiocarbon dating of egg membrane, feather, and bone from both sites revealed a young occupation dating to less than ~600 years after correcting for the marine carbon reservoir effect. The mismatch in the geologic record of Adelie Penguin occupation in the northern Antarctic Peninsula, including Lake Boeckella sediments and geologic deposits and lake sediments on King George Island, with more direct evidence of breeding colonies from ornithogenic soils from active and abandoned colonies is hereby referred to as the ‘northern enigma’ as it does not occur in other regions of Antarctica including the southern Antarctic Peninsula, East Antarctica, or the Ross Sea, where the penguin record extends to the early to middle Holocene and matches well with the geologic record of deglaciation and penguin occupation. As yet, there is no convincing explanation for the ‘northern enigma’. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
author |
Emslie, Steven D. McKenzie, Ashley Marti, Lucas J. Santos, María Mercedes |
author_facet |
Emslie, Steven D. McKenzie, Ashley Marti, Lucas J. Santos, María Mercedes |
author_sort |
Emslie, Steven D. |
title |
Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
title_short |
Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
title_full |
Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
title_fullStr |
Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
title_full_unstemmed |
Recent occupation by Adélie Penguins ( Pygoscelis adeliae ) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula |
title_sort |
recent occupation by adélie penguins ( pygoscelis adeliae ) at hope bay and seymour island and the ‘northern enigma’ in the antarctic peninsula |
publishDate |
2018 |
url |
http://sedici.unlp.edu.ar/handle/10915/140061 |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-57.000,-57.000,-63.400,-63.400) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Boeckella East Antarctica Hope Bay King George Island Lake Boeckella Ross Sea Seymour Seymour Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Boeckella East Antarctica Hope Bay King George Island Lake Boeckella Ross Sea Seymour Seymour Island The Antarctic |
genre |
Adelie penguin Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica King George Island Pygoscelis adeliae Ross Sea Seymour Island |
genre_facet |
Adelie penguin Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica King George Island Pygoscelis adeliae Ross Sea Seymour Island |
op_relation |
http://sedici.unlp.edu.ar/handle/10915/140061 issn:0722-4060 issn:1432-2056 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
op_rightsnorm |
CC-BY |
_version_ |
1766370142131847168 |