Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka
Coccolithophore assemblage data from sediment core 162-984C from the subpolar North Atlantic ocean spanning the past 24 ka. The assemblage data were used to assess changes in biodiversity and assemblage composition during the past 24 ka, i.e., from the Last Glacial Maximum (LGM) to the current warm...
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Format: | Dataset |
Language: | English |
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PANGAEA
2024
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.963219 https://doi.org/10.1594/PANGAEA.963219 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.963219 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
162-984C Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis coccolith abundances Coccolithophores Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus ssp. braarudii Coccolithus pelagicus ssp. pelagicus Coronosphaera mediterranea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gladiolithus flabellatus Hayaster perplexus Helicosphaera carteri Helicosphaera wallichii IODP Depth Scale Terminology Joides Resolution Leg162 Magnification North Atlantic North Atlantic Ocean ODP Oolithotus antillarum Oolithotus fragilis Ophiaster hydroideus Papposphaera spp. Pontosphaera discopora Pontosphaera spp. Reticulofenestra sessilis Rhabdosphaera clavigera Sample code/label Sample mass Scanned area |
spellingShingle |
162-984C Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis coccolith abundances Coccolithophores Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus ssp. braarudii Coccolithus pelagicus ssp. pelagicus Coronosphaera mediterranea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gladiolithus flabellatus Hayaster perplexus Helicosphaera carteri Helicosphaera wallichii IODP Depth Scale Terminology Joides Resolution Leg162 Magnification North Atlantic North Atlantic Ocean ODP Oolithotus antillarum Oolithotus fragilis Ophiaster hydroideus Papposphaera spp. Pontosphaera discopora Pontosphaera spp. Reticulofenestra sessilis Rhabdosphaera clavigera Sample code/label Sample mass Scanned area Baumann, Karl-Heinz Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
topic_facet |
162-984C Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis coccolith abundances Coccolithophores Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus ssp. braarudii Coccolithus pelagicus ssp. pelagicus Coronosphaera mediterranea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gladiolithus flabellatus Hayaster perplexus Helicosphaera carteri Helicosphaera wallichii IODP Depth Scale Terminology Joides Resolution Leg162 Magnification North Atlantic North Atlantic Ocean ODP Oolithotus antillarum Oolithotus fragilis Ophiaster hydroideus Papposphaera spp. Pontosphaera discopora Pontosphaera spp. Reticulofenestra sessilis Rhabdosphaera clavigera Sample code/label Sample mass Scanned area |
description |
Coccolithophore assemblage data from sediment core 162-984C from the subpolar North Atlantic ocean spanning the past 24 ka. The assemblage data were used to assess changes in biodiversity and assemblage composition during the past 24 ka, i.e., from the Last Glacial Maximum (LGM) to the current warm period covering the last deglaciation. Samples were analysed at 2-32 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 150 mg of dry bulk sediment was brought into suspension using demineralized water buffered with ammonia (pH ~ 8.5-9). The suspension was ultrasonicated for 15 to 30 s, split (split factor = 100) using a rotary splitter and filtered onto polycarbonate membrane filters (0.4 µm pore size) using a vacuum pump. Samples were dried at 40°C for 24 h before ~1x1 cm filter aliquots were mounted on an aluminium stub that was prepared with electroconductive, self-adhesive, carbon-based discs (PLANO Leit tabs). The mounted samples were sputtered with gold/palladium in a Polaron SC7640 Sputter Coater. Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x and 5,000x magnification. Where possible, a minimum of 300 coccoliths were counted. In some samples fewer coccoliths were counted due to very low abundances in the LGM. Sample mass (m), magnification, split factor (k) and the area of the scanned transect (A) and the filter (F) are given for all samples to allow calculation of the concentration of coccoliths per gram of dry bulk sediment, which was calculated using: (F*N)/(k*A*m). Coccolithophore taxonomy follows Young et al. (2003, doi:10.58998/jnr2297). Species not reported in the data are assumed to be absent (that is, zero abundance). Two subspecies of Calcidiscus leptoporus were distinguished: Calcidiscus leptoporus subsp. quadriperforatus and Calcidiscus leptoporus subsp. leptoporus. The ladder was further subdivided into small (< 5 µm) and larger (>= 5 µm) ... |
format |
Dataset |
author |
Baumann, Karl-Heinz |
author_facet |
Baumann, Karl-Heinz |
author_sort |
Baumann, Karl-Heinz |
title |
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
title_short |
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
title_full |
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
title_fullStr |
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
title_full_unstemmed |
Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka |
title_sort |
coccolith species abundances in odp hole 162-984c from the subpolar north atlantic ocean for the past 24 ka |
publisher |
PANGAEA |
publishDate |
2024 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.963219 https://doi.org/10.1594/PANGAEA.963219 |
op_coverage |
LATITUDE: 61.425300 * LONGITUDE: -24.082500 * DATE/TIME START: 1995-07-28T08:20:00 * DATE/TIME END: 1995-07-29T01:45:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 4.45 m |
long_lat |
ENVELOPE(-24.082500,-24.082500,61.425300,61.425300) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.1594/PANGAEA.965722 https://doi.pangaea.de/10.1594/PANGAEA.963219 https://doi.org/10.1594/PANGAEA.963219 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.96321910.1594/PANGAEA.965722 |
_version_ |
1810462419727679488 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.963219 2024-09-15T18:22:33+00:00 Coccolith species abundances in ODP Hole 162-984C from the subpolar North Atlantic Ocean for the past 24 ka Baumann, Karl-Heinz LATITUDE: 61.425300 * LONGITUDE: -24.082500 * DATE/TIME START: 1995-07-28T08:20:00 * DATE/TIME END: 1995-07-29T01:45:00 * MINIMUM DEPTH, sediment/rock: 0.01 m * MAXIMUM DEPTH, sediment/rock: 4.45 m 2024 text/tab-separated-values, 4290 data points https://doi.pangaea.de/10.1594/PANGAEA.963219 https://doi.org/10.1594/PANGAEA.963219 en eng PANGAEA https://doi.org/10.1594/PANGAEA.965722 https://doi.pangaea.de/10.1594/PANGAEA.963219 https://doi.org/10.1594/PANGAEA.963219 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess 162-984C Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis coccolith abundances Coccolithophores Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus ssp. braarudii Coccolithus pelagicus ssp. pelagicus Coronosphaera mediterranea DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gladiolithus flabellatus Hayaster perplexus Helicosphaera carteri Helicosphaera wallichii IODP Depth Scale Terminology Joides Resolution Leg162 Magnification North Atlantic North Atlantic Ocean ODP Oolithotus antillarum Oolithotus fragilis Ophiaster hydroideus Papposphaera spp. Pontosphaera discopora Pontosphaera spp. Reticulofenestra sessilis Rhabdosphaera clavigera Sample code/label Sample mass Scanned area dataset 2024 ftpangaea https://doi.org/10.1594/PANGAEA.96321910.1594/PANGAEA.965722 2024-08-21T00:02:28Z Coccolithophore assemblage data from sediment core 162-984C from the subpolar North Atlantic ocean spanning the past 24 ka. The assemblage data were used to assess changes in biodiversity and assemblage composition during the past 24 ka, i.e., from the Last Glacial Maximum (LGM) to the current warm period covering the last deglaciation. Samples were analysed at 2-32 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 150 mg of dry bulk sediment was brought into suspension using demineralized water buffered with ammonia (pH ~ 8.5-9). The suspension was ultrasonicated for 15 to 30 s, split (split factor = 100) using a rotary splitter and filtered onto polycarbonate membrane filters (0.4 µm pore size) using a vacuum pump. Samples were dried at 40°C for 24 h before ~1x1 cm filter aliquots were mounted on an aluminium stub that was prepared with electroconductive, self-adhesive, carbon-based discs (PLANO Leit tabs). The mounted samples were sputtered with gold/palladium in a Polaron SC7640 Sputter Coater. Coccolith counts (N) were made manually using a Zeiss DSM 940A scanning electron microscope at 3,000x and 5,000x magnification. Where possible, a minimum of 300 coccoliths were counted. In some samples fewer coccoliths were counted due to very low abundances in the LGM. Sample mass (m), magnification, split factor (k) and the area of the scanned transect (A) and the filter (F) are given for all samples to allow calculation of the concentration of coccoliths per gram of dry bulk sediment, which was calculated using: (F*N)/(k*A*m). Coccolithophore taxonomy follows Young et al. (2003, doi:10.58998/jnr2297). Species not reported in the data are assumed to be absent (that is, zero abundance). Two subspecies of Calcidiscus leptoporus were distinguished: Calcidiscus leptoporus subsp. quadriperforatus and Calcidiscus leptoporus subsp. leptoporus. The ladder was further subdivided into small (< 5 µm) and larger (>= 5 µm) ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-24.082500,-24.082500,61.425300,61.425300) |