(Appendix A) Abundance of calcareous dinoflagellates of sediment core GeoB2204-2
Citation
Höll C, Karwath B, Rühlemann C, Zonneveld K A F, Willems H (1999). (Appendix A) Abundance of calcareous dinoflagellates of sediment core GeoB2204-2. PANGAEA - Publishing Network for Geoscientific and Environmental Data. Occurrence dataset https://doi.org/10.1594/pangaea.55382 accessed via GBIF.org on 2023-01-27.Description
The environmental preferences of calcareous dinoflagellates have been investigated over the last 140 ka by comparing material from two sediment cores: one from the highly productive equatorial divergence of the eastern Atlantic Ocean and the other from the low productivity western tropical Atlantic Ocean. Pronounced differences in palaeoproductivity between the two sediment cores are indicated by high and variable organic carbon accumulation rates in the east, in contrast to relatively constant and low values in the west. Calcareous dinoflagellates show just the opposite pattern: high accumulation rates in the west and lower in the east. At the equatorial divergence, temporal variations of calcareous dinoflagellate and organic carbon accumulation rates show, for the most part, an inverse relationship. High calcareous dinoflagellate content coincides with low organic carbon accumulation rates and vice versa. In the investigated region and time interval, enhanced production of calcareous dinoflagellates can be correlated to periods of reduced palaeoproductivity probably related to relatively stratified conditions of the upper water column.Taxonomic Coverages
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Chromistarank: kingdom
Geographic Coverages
Event: GeoB2204-2,
Brazil Basin
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Bibliographic Citations
Contacts
Christine Hölloriginator
Britta Karwath
originator
Carsten Rühlemann
originator
Karin A F Zonneveld
originator
Helmut Willems
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: https://www.pangaea.de
administrative point of contact
PANGAEA - Data Publisher for Earth & Environmental Science
email: info@pangaea.de
homepage: http://www.pangaea.de