Data

The relative abundance (%) of planktonic foraminifera over time in core MD 002361, located on the shelf edge, offshore Western Australia

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=2fb543b0-07f6-11dc-92a7-00188b4c0af8&rft.title=The relative abundance (%) of planktonic foraminifera over time in core MD 002361, located on the shelf edge, offshore Western Australia&rft.identifier=http://catalogue-aodn.prod.aodn.org.au/geonetwork/srv/eng/search?uuid=2fb543b0-07f6-11dc-92a7-00188b4c0af8&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 abundant species within core MD002361 is the subtropical species Gs. ruber. High abundances =30% are seen during the interglacial periods Marine Isotope Stages (MIS) 11, 9, 7, 5 with peak abundance (37.7%) during the Holocene. Other tropical and subtropical species follow this pattern. The transitional, deep dwelling species Gr. inflata has the most distinct abundance change within core MD002361. This species is absent during the interglacial periods but achieves high relative abundances (~20-30%) during glacial periods.Maintenance and Update Frequency: notPlannedStatement: Foraminifera were identified accurately to a species level, with an average of 436 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=113.48338,-22.09163 113.48516,-22.09177 113.48469,-22.09283 113.48360,-22.09270 113.48338,-22.09163&rft.coverage=westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22&rft.coverage=westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22&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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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).

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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 abundant species within core MD002361 is the subtropical species Gs. ruber. High abundances =30% are seen during the interglacial periods Marine Isotope Stages (MIS) 11, 9, 7, 5 with peak abundance (37.7%) during the Holocene. Other tropical and subtropical species follow this pattern. The transitional, deep dwelling species Gr. inflata has the most distinct abundance change within core MD002361. This species is absent during the interglacial periods but achieves high relative abundances (~20-30%) during glacial periods.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Foraminifera were identified accurately to a species level, with an average of 436 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 Research Council (ARC)
Credit
Funded by The Australian Institute of Nuclear Science Engineering (AINSE)
Credit
Funded by The Murray Darling Basin Commission
Purpose
To reconstruct the faunal assemblages of planktonic foraminifera through time and to give insight into the palaeoceanography of the core location.

Issued: 22 03 2007

Data time period: 2000-01-01 to 2000-01-01

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113.48338,-22.09163 113.48516,-22.09177 113.48469,-22.09283 113.4836,-22.0927 113.48338,-22.09163

113.48427,-22.09223

113.5,-22 113.5,-22.5 113,-22.5 113,-22 113.5,-22

113.25,-22.25

text: westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22

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_MD002361_3_data.xls)

uri : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/2fb543b0-07f6-11dc-92a7-00188b4c0af8/attachments/ANU_Spooner_MD002361_3_data.xls

global : 85ccfd40-07f8-11dc-92a7-00188b4c0af8

Identifiers
  • global : 2fb543b0-07f6-11dc-92a7-00188b4c0af8
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