The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra
Statement: Foraminifera were identified accurately to a species level, with an average of 437 individuals picked and identified per sample. Relative species abundances are calculated as a percentage of the total count. Parameters: Age of core (yrs BP), relative abundance of planktonic foraminifera a...
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ftands:oai:ands.org.au::679962 2023-10-25T01:42:59+02:00 The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra De Deckker, Patrick (collaborator) Department of Earth and Marine Sciences (DEMS), The Australian National University (ANU) (hasAssociationWith) Horizon Oil Ltd (hasAssociationWith) Research School of Earth Sciences (RSES), The Australian National University (ANU) (hasAssociationWith) Spooner, Michelle (hasPrincipalInvestigator) Spatial: 104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905. Spatial: westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5 Spatial: uplimit=2034; downlimit=2034 Temporal: From 1994-01-01 to 1994-01-01 https://researchdata.edu.au/the-relative-abundance-coast-sumatra/679962 unknown Australian Ocean Data Network https://researchdata.edu.au/the-relative-abundance-coast-sumatra/679962 626d4b90-04f9-11dc-b5d9-00188b4c0af8 Horizon Oil Ltd Research School of Earth Sciences (RSES), The Australian National University (ANU) biota POPULATION DYNAMICS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS FORAMINIFERS BIOLOGICAL CLASSIFICATION PROTISTS AMOEBOIDS age_of_core taxonomic_group_count dataset ftands 2023-09-25T22:30:30Z Statement: Foraminifera were identified accurately to a species level, with an average of 437 individuals picked and identified per sample. Relative species abundances are calculated as a percentage of the total count. Parameters: Age of core (yrs BP), relative abundance of planktonic foraminifera assemblages (%). Statement: Counts of planktonic foraminifera were made on splits of the >150µm fractions to provide a base level for ecological counts, removing small juvenile and possibly unidentifiable foraminifera. Each sample was split by an Otto-micro splitter until ~400 species were present in the final split. Credit The Australian National University (ANU) Credit Funded by The National Oceans Office (NOO) Credit Funded by The French Polar Institute Credit Funded by The Australian Institute of Nuclear Science Engineering (AINSE) Credit Funded by The Australian Research Council (ARC) Credit Funded by The Murray Darling Basin Commission Purpose To reconstruct the faunal assemblages of planktonic foraminifera through time and give insight into palaeoceanography of core location. The advent of deep-sea drilling in the 1950's prompted the use of planktonic foraminifera (unicellular protozans) as palaeoceanographic indicators. They provide a natural archive of past environmental changes due to their global distribution, their prolific productivity and sensitivity to environmental variations. The most obvious change in relative abundance in core BAR9403 (off the coast of Sumatra) is shown by sub-polar to transitional 'upwelling' species Ga. bulloides with abundances of 26% at approximately 14,000yrs BP and 22.7% during the Holocene. This is compared to the periods from Marine Isotope Stage (MIS) 3 to the Last Glacial Maximum (LGM) where the relative abundance of Ga. bulloides is generally <10%. Gr. menardii, a tropical 'upwelling' species, also increases its relative abundance during MIS 2 from <8% during MIS 3 to a peak abundance of 16% at ~17,000yrs BP. Dataset Planktonic foraminifera Research Data Australia (Australian National Data Service - ANDS) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota POPULATION DYNAMICS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS FORAMINIFERS BIOLOGICAL CLASSIFICATION PROTISTS AMOEBOIDS age_of_core taxonomic_group_count |
spellingShingle |
biota POPULATION DYNAMICS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS FORAMINIFERS BIOLOGICAL CLASSIFICATION PROTISTS AMOEBOIDS age_of_core taxonomic_group_count The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
topic_facet |
biota POPULATION DYNAMICS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS FORAMINIFERS BIOLOGICAL CLASSIFICATION PROTISTS AMOEBOIDS age_of_core taxonomic_group_count |
description |
Statement: Foraminifera were identified accurately to a species level, with an average of 437 individuals picked and identified per sample. Relative species abundances are calculated as a percentage of the total count. Parameters: Age of core (yrs BP), relative abundance of planktonic foraminifera assemblages (%). Statement: Counts of planktonic foraminifera were made on splits of the >150µm fractions to provide a base level for ecological counts, removing small juvenile and possibly unidentifiable foraminifera. Each sample was split by an Otto-micro splitter until ~400 species were present in the final split. Credit The Australian National University (ANU) Credit Funded by The National Oceans Office (NOO) Credit Funded by The French Polar Institute Credit Funded by The Australian Institute of Nuclear Science Engineering (AINSE) Credit Funded by The Australian Research Council (ARC) Credit Funded by The Murray Darling Basin Commission Purpose To reconstruct the faunal assemblages of planktonic foraminifera through time and give insight into palaeoceanography of core location. The advent of deep-sea drilling in the 1950's prompted the use of planktonic foraminifera (unicellular protozans) as palaeoceanographic indicators. They provide a natural archive of past environmental changes due to their global distribution, their prolific productivity and sensitivity to environmental variations. The most obvious change in relative abundance in core BAR9403 (off the coast of Sumatra) is shown by sub-polar to transitional 'upwelling' species Ga. bulloides with abundances of 26% at approximately 14,000yrs BP and 22.7% during the Holocene. This is compared to the periods from Marine Isotope Stage (MIS) 3 to the Last Glacial Maximum (LGM) where the relative abundance of Ga. bulloides is generally <10%. Gr. menardii, a tropical 'upwelling' species, also increases its relative abundance during MIS 2 from <8% during MIS 3 to a peak abundance of 16% at ~17,000yrs BP. |
author2 |
De Deckker, Patrick (collaborator) Department of Earth and Marine Sciences (DEMS), The Australian National University (ANU) (hasAssociationWith) Horizon Oil Ltd (hasAssociationWith) Research School of Earth Sciences (RSES), The Australian National University (ANU) (hasAssociationWith) Spooner, Michelle (hasPrincipalInvestigator) |
format |
Dataset |
title |
The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
title_short |
The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
title_full |
The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
title_fullStr |
The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
title_full_unstemmed |
The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra |
title_sort |
relative abundance (%) of planktonic foraminifera over time in core bar 9403, located off the coast of sumatra |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/the-relative-abundance-coast-sumatra/679962 |
op_coverage |
Spatial: 104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905. Spatial: westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5 Spatial: uplimit=2034; downlimit=2034 Temporal: From 1994-01-01 to 1994-01-01 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Horizon Oil Ltd Research School of Earth Sciences (RSES), The Australian National University (ANU) |
op_relation |
https://researchdata.edu.au/the-relative-abundance-coast-sumatra/679962 626d4b90-04f9-11dc-b5d9-00188b4c0af8 |
_version_ |
1780739713596915712 |