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Höll, Christine; Karwath, Britta; Rühlemann, Carsten; Zonneveld, Karin A F; Willems, Helmut (1999): (Appendix A) Abundance of calcareous dinoflagellates of sediment core GeoB2204-2. PANGAEA,, Supplement to: Höll, C et al. (1999): Palaeoenvironmental information gained from calcareous dinoflagellates: The Late Quaternary eastern and western tropical Atlantic in comparison. Palaeogeography, Palaeoclimatology, Palaeoecology, 146(1-4), 147-164,

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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.
Related to:
Höll, Christine (1998): Kalkige und organisch-wandige Dinoflagellaten-Zysten in Spätquartären Sedimenten des tropischen Atlantiks und ihre palökologische Auswertbarkeit. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 127, 121 pp, urn:nbn:de:gbv:46-ep000102467
Latitude: -8.528333 * Longitude: -34.021667
Date/Time Start: 1993-03-22T00:00:00 * Date/Time End: 1993-03-22T00:00:00
Minimum DEPTH, sediment/rock: 0.05 m * Maximum DEPTH, sediment/rock: 3.45 m
GeoB2204-2 * Latitude: -8.528333 * Longitude: -34.021667 * Date/Time: 1993-03-22T00:00:00 * Elevation: -2072.0 m * Recovery: 8.97 m * Location: Brazil Basin * Campaign: M23/3 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: weight on top of sediment
For calcareous dinoflagellates of GeoB1105-4 see Höll et al. (1998) dataset: doi:10.1594/PANGAEA.55381
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepth sedmGeocode
2Thoracosphaera heimiiT. heimii#Höll, ChristineCounting, dinoflagellate cysts
3Calciodinellum albatrosianumC. albatrosianum#Höll, ChristineCounting, dinoflagellate cysts
4Calciodinellum levantinumC. levantinum#Höll, ChristineCounting, dinoflagellate cysts
5Calciodinellum levantinumC. levantinum#Höll, ChristineCounting, dinoflagellate cystsspecies 3
6Leonella graniferaL. granifera#Höll, ChristineCounting, dinoflagellate cysts
7Rhabdothorax spp.Rhabdothorax spp.#Höll, ChristineCounting, dinoflagellate cysts
8Sample massSamp mgHöll, Christinesee reference(s)
9Sample volumeSamp vollHöll, Christinesee reference(s)
10Slide volumeslide volmlHöll, Christinesee reference(s)
315 data points

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