History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica
Maintenance and Update Frequency: unknown Statement: Unknown This study presents compelling evidence for a diverse and abundant seabed community which has developed over the course of the Holocene beneath the Amery Ice Shelf in East Antarctica. Fossil analysis of a 47 cm long sediment core reveals a...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://researchdata.edu.au/history-benthic-colonisation-east-antarctica/683890 https://pid.geoscience.gov.au/dataset/ga/64953 https://doi.org/10.3354/meps06966 |
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ftands:oai:ands.org.au::683890 2024-09-15T17:38:42+00:00 History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica APOST (custodian) Commonwealth of Australia (Geoscience Australia) (owner) Commonwealth of Australia (Geoscience Australia) (pointOfContact) Craven, M. (author) EGD (hasAssociationWith) Hemer, M.A. (author) Manager Client Services (distributor) Manager Client Services (custodian) O'Brien, P.E. (author) Post, A.L. (author) Roberts, D. (author) Spatial: westlimit=68.0; southlimit=-72.0; eastlimit=76.0; northlimit=-66.0 https://researchdata.edu.au/history-benthic-colonisation-east-antarctica/683890 https://pid.geoscience.gov.au/dataset/ga/64953 https://doi.org/10.3354/meps06966 unknown Australian Ocean Data Network https://researchdata.edu.au/history-benthic-colonisation-east-antarctica/683890 a05f7892-cf1c-7506-e044-00144fdd4fa6 https://pid.geoscience.gov.au/dataset/ga/64953 doi:10.3354/meps06966 EGD Commonwealth of Australia (Geoscience Australia) geoscientificInformation External Publication Article Antarctic data palaeoclimatology habitat marine AQ EARTH SCIENCES Published_External publication ftands https://doi.org/10.3354/meps06966 2024-08-06T01:59:00Z Maintenance and Update Frequency: unknown Statement: Unknown This study presents compelling evidence for a diverse and abundant seabed community which has developed over the course of the Holocene beneath the Amery Ice Shelf in East Antarctica. Fossil analysis of a 47 cm long sediment core reveals a rich modern fauna, dominated by filter feeders (sponges and bryozoans), with an abundant infauna predominantly of polychaetes. The down-core assemblage reveals a succession in the colonisation of this site. The lower portion of the core (prior to ~9600 yr BP) is completely devoid of preserved fauna. The first colonisers of the site after this time were the mobile benthic organisms. Their occurrence in the core is matched by the first appearance of planktonic taxa, indicating a retreat of the ice shelf following the last glaciation to within sufficient distance to advect planktonic particles via bottom currents. The benthic infauna and filter feeders emerged during the peak abundance of the planktonic organisms, indicating their dependence on this advected food supply which is brought via bottom currents flowing from the open shelf waters of Prydz Bay. Understanding patterns of species succession in this environment has important implications for determining the potential significance of future global change. The collapse of Antarctic ice shelves, as has happened in recent times, would significantly change the organic supply regime, and therefore the nature of these sub-ice shelf benthic communities. Text Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Prydz Bay Research Data Australia (Australian National Data Service - ANDS) Marine Ecology Progress Series 344 29 37 |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation External Publication Article Antarctic data palaeoclimatology habitat marine AQ EARTH SCIENCES Published_External |
spellingShingle |
geoscientificInformation External Publication Article Antarctic data palaeoclimatology habitat marine AQ EARTH SCIENCES Published_External History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
topic_facet |
geoscientificInformation External Publication Article Antarctic data palaeoclimatology habitat marine AQ EARTH SCIENCES Published_External |
description |
Maintenance and Update Frequency: unknown Statement: Unknown This study presents compelling evidence for a diverse and abundant seabed community which has developed over the course of the Holocene beneath the Amery Ice Shelf in East Antarctica. Fossil analysis of a 47 cm long sediment core reveals a rich modern fauna, dominated by filter feeders (sponges and bryozoans), with an abundant infauna predominantly of polychaetes. The down-core assemblage reveals a succession in the colonisation of this site. The lower portion of the core (prior to ~9600 yr BP) is completely devoid of preserved fauna. The first colonisers of the site after this time were the mobile benthic organisms. Their occurrence in the core is matched by the first appearance of planktonic taxa, indicating a retreat of the ice shelf following the last glaciation to within sufficient distance to advect planktonic particles via bottom currents. The benthic infauna and filter feeders emerged during the peak abundance of the planktonic organisms, indicating their dependence on this advected food supply which is brought via bottom currents flowing from the open shelf waters of Prydz Bay. Understanding patterns of species succession in this environment has important implications for determining the potential significance of future global change. The collapse of Antarctic ice shelves, as has happened in recent times, would significantly change the organic supply regime, and therefore the nature of these sub-ice shelf benthic communities. |
author2 |
APOST (custodian) Commonwealth of Australia (Geoscience Australia) (owner) Commonwealth of Australia (Geoscience Australia) (pointOfContact) Craven, M. (author) EGD (hasAssociationWith) Hemer, M.A. (author) Manager Client Services (distributor) Manager Client Services (custodian) O'Brien, P.E. (author) Post, A.L. (author) Roberts, D. (author) |
format |
Text |
title |
History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
title_short |
History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
title_full |
History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
title_fullStr |
History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
title_full_unstemmed |
History of benthic colonisation beneath the Amery Ice Shelf, East Antarctica |
title_sort |
history of benthic colonisation beneath the amery ice shelf, east antarctica |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/history-benthic-colonisation-east-antarctica/683890 https://pid.geoscience.gov.au/dataset/ga/64953 https://doi.org/10.3354/meps06966 |
op_coverage |
Spatial: westlimit=68.0; southlimit=-72.0; eastlimit=76.0; northlimit=-66.0 |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Prydz Bay |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Shelf Ice Shelves Prydz Bay |
op_source |
EGD Commonwealth of Australia (Geoscience Australia) |
op_relation |
https://researchdata.edu.au/history-benthic-colonisation-east-antarctica/683890 a05f7892-cf1c-7506-e044-00144fdd4fa6 https://pid.geoscience.gov.au/dataset/ga/64953 doi:10.3354/meps06966 |
op_doi |
https://doi.org/10.3354/meps06966 |
container_title |
Marine Ecology Progress Series |
container_volume |
344 |
container_start_page |
29 |
op_container_end_page |
37 |
_version_ |
1810474886515130368 |