Abundance of calcareous dinoflagellates of sediment cores from the South Atlantic Ocean
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| Main Authors: | , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2000
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| _version_ | 1867168550700974080 |
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| author | Esper, Oliver Zonneveld, Karin A F Höll, Christine Karwath, Britta Schneider, Ralph R Vink, Annemiek Weise-Ihlo, Ilka Willems, Helmut |
| author_facet | Esper, Oliver Zonneveld, Karin A F Höll, Christine Karwath, Britta Schneider, Ralph R Vink, Annemiek Weise-Ihlo, Ilka Willems, Helmut |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Despite the increasing interest in the South Atlantic Ocean as a key area of the heat exchange between the southern and the northern hemisphere, information about its palaeoceanographic conditions during transitions from glacial to interglacial stages, the so-called Terminations, are not well understood. Herein we attempt to increase this information by studying the calcareous dinoflagellate cysts and the shells of Thoracosphaera heimii (calcareous cysts) of five Late Quaternary South Atlantic Ocean cores. Extremely high accumulation rates of calcareous cysts at the Terminations might be due to a combined effect of increased cyst production and better preservation as result of calm, oligotrophic conditions in the upper water layers. Low relative abundance of Sphaerodinella albatrosiana compared with Sphaerodinella tuberosa in the Cape Basin may be the result of the relatively colder environmental conditions in this region compared with the equatorial Atlantic Ocean with high relative abundance of S. albatrosiana. Furthermore, the predominance of S. tuberosa during glacials and interglacials at the observed site of the western Atlantic Ocean reflects decreased salinity in the upper water layer. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_603886 |
| institution | PANGAEA |
| language | en |
| publishDate | 2000 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Abundance of calcareous dinoflagellates of sediment cores from the South Atlantic Ocean Esper, Oliver Zonneveld, Karin A F Höll, Christine Karwath, Britta Schneider, Ralph R Vink, Annemiek Weise-Ihlo, Ilka Willems, Helmut Brazil Basin; Cape Basin; Equatorial Atlantic; GeoB; GeoB1105-4; GeoB1117-2; GeoB1214-1; GeoB2204-2; GeoB3603-2; Geosciences, University of Bremen; Gravity corer (Kiel type); M12/1; M23/3; M34/1; M9/4; Meteor (1986); SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Southern Cape Basin Despite the increasing interest in the South Atlantic Ocean as a key area of the heat exchange between the southern and the northern hemisphere, information about its palaeoceanographic conditions during transitions from glacial to interglacial stages, the so-called Terminations, are not well understood. Herein we attempt to increase this information by studying the calcareous dinoflagellate cysts and the shells of Thoracosphaera heimii (calcareous cysts) of five Late Quaternary South Atlantic Ocean cores. Extremely high accumulation rates of calcareous cysts at the Terminations might be due to a combined effect of increased cyst production and better preservation as result of calm, oligotrophic conditions in the upper water layers. Low relative abundance of Sphaerodinella albatrosiana compared with Sphaerodinella tuberosa in the Cape Basin may be the result of the relatively colder environmental conditions in this region compared with the equatorial Atlantic Ocean with high relative abundance of S. albatrosiana. Furthermore, the predominance of S. tuberosa during glacials and interglacials at the observed site of the western Atlantic Ocean reflects decreased salinity in the upper water layer. |
| title | Abundance of calcareous dinoflagellates of sediment cores from the South Atlantic Ocean |
| topic | Brazil Basin; Cape Basin; Equatorial Atlantic; GeoB; GeoB1105-4; GeoB1117-2; GeoB1214-1; GeoB2204-2; GeoB3603-2; Geosciences, University of Bremen; Gravity corer (Kiel type); M12/1; M23/3; M34/1; M9/4; Meteor (1986); SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Southern Cape Basin |
| url | https://doi.org/10.1594/PANGAEA.603886 |