Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka
Coccolithophore assemblage data from sediment core M35003-4 from the western subtropical North Atlantic Ocean spanning the past 55 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 to the current...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.965782 2024-09-15T18:23:01+00:00 Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka Baumann, Karl-Heinz LATITUDE: 12.090000 * LONGITUDE: -61.243333 * DATE/TIME START: 1996-04-19T00:00:00 * DATE/TIME END: 1996-04-19T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.05 m * MAXIMUM DEPTH, sediment/rock: 9.50 m 2024 text/tab-separated-values, 3834 data points https://doi.pangaea.de/10.1594/PANGAEA.965782 https://doi.org/10.1594/PANGAEA.965782 en eng PANGAEA https://doi.org/10.1594/PANGAEA.965722 https://doi.pangaea.de/10.1594/PANGAEA.965782 https://doi.org/10.1594/PANGAEA.965782 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis Calciosolenia murrayi coccolith abundances Coccolithophores Coccoliths reworked reworked per unit sediment mass Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus DEPTH sediment/rock Discosphaera tubifera Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gephyrocapsa ornata Gladiolithus flabellatus Gravity corer (Kiel type) Helicosphaera carteri Helicosphaera spp. M35/1 M35003-4 Magnification Meteor (1986) Michaelsarsia spp. Oolithotus fragilis Reticulofenestra sessilis Rhabdosphaera clavigera Rhabdosphaera clavigera var. stylifera Sample mass Scanned area Scanning electron microscope (SEM) Zeiss DSM 940A SL Split factor subtropical North Atlantic dataset 2024 ftpangaea https://doi.org/10.1594/PANGAEA.96578210.1594/PANGAEA.965722 2024-07-24T02:31:43Z Coccolithophore assemblage data from sediment core M35003-4 from the western subtropical North Atlantic Ocean spanning the past 55 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 to the current warm period covering the last deglaciation. Samples were analysed at 5 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 100 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 magnification. Two samples were counted on SEM images at 2,000x magnification. A minimum of 288 coccoliths were counted. 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) coccoliths. The variety Rhabdosphaera clavigera ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-61.243333,-61.243333,12.090000,12.090000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis Calciosolenia murrayi coccolith abundances Coccolithophores Coccoliths reworked reworked per unit sediment mass Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus DEPTH sediment/rock Discosphaera tubifera Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gephyrocapsa ornata Gladiolithus flabellatus Gravity corer (Kiel type) Helicosphaera carteri Helicosphaera spp. M35/1 M35003-4 Magnification Meteor (1986) Michaelsarsia spp. Oolithotus fragilis Reticulofenestra sessilis Rhabdosphaera clavigera Rhabdosphaera clavigera var. stylifera Sample mass Scanned area Scanning electron microscope (SEM) Zeiss DSM 940A SL Split factor subtropical North Atlantic |
spellingShingle |
Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis Calciosolenia murrayi coccolith abundances Coccolithophores Coccoliths reworked reworked per unit sediment mass Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus DEPTH sediment/rock Discosphaera tubifera Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gephyrocapsa ornata Gladiolithus flabellatus Gravity corer (Kiel type) Helicosphaera carteri Helicosphaera spp. M35/1 M35003-4 Magnification Meteor (1986) Michaelsarsia spp. Oolithotus fragilis Reticulofenestra sessilis Rhabdosphaera clavigera Rhabdosphaera clavigera var. stylifera Sample mass Scanned area Scanning electron microscope (SEM) Zeiss DSM 940A SL Split factor subtropical North Atlantic Baumann, Karl-Heinz Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
topic_facet |
Acanthoica quattrospina AGE Algirosphaera robusta Assemblages Calcidiscus leptoporus ssp. leptoporus Calcidiscus leptoporus ssp. quadriperforatus Calciosolenia brasiliensis Calciosolenia murrayi coccolith abundances Coccolithophores Coccoliths reworked reworked per unit sediment mass Coccoliths indeterminata Coccoliths indeterminata per unit sediment mass Coccolithus pelagicus DEPTH sediment/rock Discosphaera tubifera Emiliania huxleyi Filter area Florisphaera profunda Frame width Gephyrocapsa ericsonii Gephyrocapsa muellerae Gephyrocapsa oceanica Gephyrocapsa ornata Gladiolithus flabellatus Gravity corer (Kiel type) Helicosphaera carteri Helicosphaera spp. M35/1 M35003-4 Magnification Meteor (1986) Michaelsarsia spp. Oolithotus fragilis Reticulofenestra sessilis Rhabdosphaera clavigera Rhabdosphaera clavigera var. stylifera Sample mass Scanned area Scanning electron microscope (SEM) Zeiss DSM 940A SL Split factor subtropical North Atlantic |
description |
Coccolithophore assemblage data from sediment core M35003-4 from the western subtropical North Atlantic Ocean spanning the past 55 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 to the current warm period covering the last deglaciation. Samples were analysed at 5 cm intervals and were prepared using a combined dilution/filtering technique as described by Andruleit (1996, doi:10.2307/1485964). Between 50 and 100 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 magnification. Two samples were counted on SEM images at 2,000x magnification. A minimum of 288 coccoliths were counted. 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) coccoliths. The variety Rhabdosphaera clavigera ... |
format |
Dataset |
author |
Baumann, Karl-Heinz |
author_facet |
Baumann, Karl-Heinz |
author_sort |
Baumann, Karl-Heinz |
title |
Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
title_short |
Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
title_full |
Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
title_fullStr |
Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
title_full_unstemmed |
Coccolith species abundances in sediment core M35003-4 from the western subtropical North Atlantic Ocean for the past 55 ka |
title_sort |
coccolith species abundances in sediment core m35003-4 from the western subtropical north atlantic ocean for the past 55 ka |
publisher |
PANGAEA |
publishDate |
2024 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.965782 https://doi.org/10.1594/PANGAEA.965782 |
op_coverage |
LATITUDE: 12.090000 * LONGITUDE: -61.243333 * DATE/TIME START: 1996-04-19T00:00:00 * DATE/TIME END: 1996-04-19T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.05 m * MAXIMUM DEPTH, sediment/rock: 9.50 m |
long_lat |
ENVELOPE(-61.243333,-61.243333,12.090000,12.090000) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.1594/PANGAEA.965722 https://doi.pangaea.de/10.1594/PANGAEA.965782 https://doi.org/10.1594/PANGAEA.965782 |
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.96578210.1594/PANGAEA.965722 |
_version_ |
1810463138649210880 |