Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy
Within the past 7 years, the northern Larsen Ice Shelf has broken up so it is now possible to sample the sea floor that formerly lay beneath it. Box cores have yielded surface sediment samples (0-1 cm) that give information on living and dead foraminiferal assemblages. The living assemblages are of...
Published in: | Marine Micropaleontology |
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2004
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Online Access: | http://nora.nerc.ac.uk/id/eprint/12313/ http://www.sciencedirect.com/science/article/pii/S0377839804000465 |
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ftnerc:oai:nora.nerc.ac.uk:12313 2023-05-15T13:45:11+02:00 Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy Murray, John W. Pudsey, Carol J. 2004 http://nora.nerc.ac.uk/id/eprint/12313/ http://www.sciencedirect.com/science/article/pii/S0377839804000465 unknown Elsevier Murray, John W.; Pudsey, Carol J. 2004 Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy. Marine Micropaleontology, 53 (1-2). 67-81. https://doi.org/10.1016/j.marmicro.2004.04.001 <https://doi.org/10.1016/j.marmicro.2004.04.001> Biology and Microbiology Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1016/j.marmicro.2004.04.001 2023-02-04T19:27:55Z Within the past 7 years, the northern Larsen Ice Shelf has broken up so it is now possible to sample the sea floor that formerly lay beneath it. Box cores have yielded surface sediment samples (0-1 cm) that give information on living and dead foraminiferal assemblages. The living assemblages are of moderate diversity and four have >50% calcareous tests while five have >50% agglutinated tests. This is an area of high primary production and the standing crops of the benthic foraminiferal assemblages are high. All the dead assemblages are much enriched in agglutinated tests, often >90%. They give a time-averaged record of the past 7 ice-free years and several decades of ice cover. The loss of permanent ice cover (there is still seasonal ice cover) may have caused some response from the fauna, but it is likely that it was mainly changes in relative/absolute abundance of the existing fauna. The differences between the live and dead assemblages in the surface 1 cm are attributed mainly to taphonomic effects: dissolution of calcareous tests and loss of fragile agglutinated tests. Subsurface samples down to 5 cm show that dissolution of calcareous tests is widespread and there may be some loss of fragile agglutinated forms such as Reophax subdentaliniformis. For these reasons, in this area, it may be best to make palaeoecological interpretations on the agglutinated component of the fossil assemblages. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Larsen Ice Shelf Weddell Sea Natural Environment Research Council: NERC Open Research Archive Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) Weddell Weddell Sea Marine Micropaleontology 53 1-2 67 81 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Biology and Microbiology |
spellingShingle |
Biology and Microbiology Murray, John W. Pudsey, Carol J. Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
topic_facet |
Biology and Microbiology |
description |
Within the past 7 years, the northern Larsen Ice Shelf has broken up so it is now possible to sample the sea floor that formerly lay beneath it. Box cores have yielded surface sediment samples (0-1 cm) that give information on living and dead foraminiferal assemblages. The living assemblages are of moderate diversity and four have >50% calcareous tests while five have >50% agglutinated tests. This is an area of high primary production and the standing crops of the benthic foraminiferal assemblages are high. All the dead assemblages are much enriched in agglutinated tests, often >90%. They give a time-averaged record of the past 7 ice-free years and several decades of ice cover. The loss of permanent ice cover (there is still seasonal ice cover) may have caused some response from the fauna, but it is likely that it was mainly changes in relative/absolute abundance of the existing fauna. The differences between the live and dead assemblages in the surface 1 cm are attributed mainly to taphonomic effects: dissolution of calcareous tests and loss of fragile agglutinated tests. Subsurface samples down to 5 cm show that dissolution of calcareous tests is widespread and there may be some loss of fragile agglutinated forms such as Reophax subdentaliniformis. For these reasons, in this area, it may be best to make palaeoecological interpretations on the agglutinated component of the fossil assemblages. |
format |
Article in Journal/Newspaper |
author |
Murray, John W. Pudsey, Carol J. |
author_facet |
Murray, John W. Pudsey, Carol J. |
author_sort |
Murray, John W. |
title |
Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
title_short |
Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
title_full |
Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
title_fullStr |
Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
title_full_unstemmed |
Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy |
title_sort |
living (stained) and dead foraminifera from the newly ice-free larsen ice shelf, weddell sea, antarctica: ecology and taphonomy |
publisher |
Elsevier |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/12313/ http://www.sciencedirect.com/science/article/pii/S0377839804000465 |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Larsen Ice Shelf Weddell Weddell Sea |
geographic_facet |
Larsen Ice Shelf Weddell Weddell Sea |
genre |
Antarc* Antarctica Ice Shelf Larsen Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctica Ice Shelf Larsen Ice Shelf Weddell Sea |
op_relation |
Murray, John W.; Pudsey, Carol J. 2004 Living (stained) and dead foraminifera from the newly ice-free Larsen Ice Shelf, Weddell Sea, Antarctica: ecology and taphonomy. Marine Micropaleontology, 53 (1-2). 67-81. https://doi.org/10.1016/j.marmicro.2004.04.001 <https://doi.org/10.1016/j.marmicro.2004.04.001> |
op_doi |
https://doi.org/10.1016/j.marmicro.2004.04.001 |
container_title |
Marine Micropaleontology |
container_volume |
53 |
container_issue |
1-2 |
container_start_page |
67 |
op_container_end_page |
81 |
_version_ |
1766215024193306624 |