Data

The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra

Australian Ocean Data Network
Spooner, Michelle ; De Deckker, Patrick
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=626d4b90-04f9-11dc-b5d9-00188b4c0af8&rft.title=The relative abundance (%) of planktonic foraminifera over time in core BAR 9403, located off the coast of Sumatra&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=626d4b90-04f9-11dc-b5d9-00188b4c0af8&rft.description=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 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.&rft.creator=Spooner, Michelle &rft.creator=De Deckker, Patrick &rft.date=2007&rft.coverage=104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905&rft.coverage=westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5&rft.coverage=westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5&rft.coverage=uplimit=2034; downlimit=2034&rft.coverage=uplimit=2034; downlimit=2034&rft_rights= http://creativecommons.org/licenses/by/2.5/au/&rft_rights=http://i.creativecommons.org/l/by/2.5/au/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 2.5 Australia License&rft_rights=http://creativecommons.org/international/au/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au&rft_subject=biota&rft_subject=POPULATION DYNAMICS&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=FORAMINIFERS&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=PROTISTS&rft_subject=AMOEBOIDS&rft_subject=age_of_core&rft_subject=taxonomic_group_count&rft.type=dataset&rft.language=English Access the data
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Brief description

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.

Lineage

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.

Notes

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.

Issued: 22 03 2007

Data time period: 1994-01-01 to 1994-01-01

This dataset is part of a larger collection

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104.01188,-5.79905 104.06901,-5.79973 104.06143,-5.84695 104.01118,-5.84697 104.01188,-5.79905

104.040095,-5.82301

104.5,-5.5 104.5,-6 104,-6 104,-5.5 104.5,-5.5

104.25,-5.75

text: westlimit=104; southlimit=-6; eastlimit=104.5; northlimit=-5.5

text: uplimit=2034; downlimit=2034

Subjects
AMOEBOIDS | BIOLOGICAL CLASSIFICATION | BIOSPHERE | EARTH SCIENCE | ECOLOGICAL DYNAMICS | Foraminifers | Population Dynamics | PROTISTS | SPECIES/POPULATION INTERACTIONS | age_of_core | biota | taxonomic_group_count |

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Other Information
(ANU_Spooner_BAR9403_3_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/626d4b90-04f9-11dc-b5d9-00188b4c0af8/attachments/ANU_Spooner_BAR9403_3_data.xls

global : 63899a20-07f0-11dc-92a7-00188b4c0af8

Identifiers
  • global : 626d4b90-04f9-11dc-b5d9-00188b4c0af8
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