Recent occupation by Adélie Penguins (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula

We excavated active and abandoned Adelie Penguin (<i>Pygoscelis adeliae</i>) 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...

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Detalles Bibliográficos
Autores principales: Emslie, Steven D., McKenzie, Ashley, Marti, Lucas J., Santos, María Mercedes
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Naturales
Adélie Penguin
Occupation history
Ornithogenic soils
Hope Bay
Seymour Island
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/140061
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-140061
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
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 (<i>Pygoscelis adeliae</i>) 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 (<i>Pygoscelis adeliae</i>) 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’.
format Articulo
Articulo
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 (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
title_short Recent occupation by Adélie Penguins (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
title_full Recent occupation by Adélie Penguins (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
title_fullStr Recent occupation by Adélie Penguins (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
title_full_unstemmed Recent occupation by Adélie Penguins (<i>Pygoscelis adeliae</i>) at Hope Bay and Seymour Island and the ‘northern enigma’ in the Antarctic Peninsula
title_sort recent occupation by adélie penguins (<i>pygoscelis adeliae</i>) 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
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