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  • Amazon Fan; Amazon Shelf/Fan; Atlantic Caribbean Margin; Bitectatodinium spongium; Brazil Basin; Brigantedinium; Brigantedinium cariacoense; Ceara Rise; Continental slope off Brazil; Counting, dinoflagellate cysts; Dalella chathamensis; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Diplopelta symmetrica; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium spp.; Echinidinium transparantum; Elevation of event; Equatorial Atlantic; Event label; GeoB; GeoB3809-1; GeoB3810-2; GeoB3812-2; GeoB3822-1; GeoB3825-1; GeoB3826-2; GeoB3827-1; GeoB3906-9; GeoB3908-11; GeoB3909-1; GeoB3910-3; GeoB3911-1; GeoB3912-2; GeoB3913-2; GeoB3914-3; GeoB3916-1; GeoB3918-1; GeoB3925-2; GeoB3935-1; GeoB3936-2; GeoB3937-1; GeoB3938-2; GeoB3939-1; GeoB4306-1; GeoB4311-1; GeoB4319-11; GeoB4401-3; GeoB4404-2; GeoB4408-3; GeoB4412-3; GeoB4417-5; GeoB4418-2; GeoB4423-3; GeoB4424-2; Geosciences, University of Bremen; Guayana continental slope; Impagidinium aculeatum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium variaseptum; Impagidinium velorum; Latitude of event; Lejeunecysta oliva; Lejeunecysta sabrina; Lingulodinium machaerophorum long; Lingulodinium machaerophorum short; Longitude of event; M34/3; M34/4; M38/1; M38/2; Melitasphaeridium; Meteor (1986); Midatlantic Ridge; Mid Atlantic Ridge; MUC; MultiCorer; Multispinula quanta; Nematosphaeropsis labyrinthus; Nematosphaeropsis lemniscata; Northeast Brasilian Margin; Northern Brasil Basin; Operculodinium; Operculodinium israelianum long; Operculodinium israelianum short; Pentapharsodinium dalei; Pixidinopsis reticulata; Polyspaeridium zoharyi; Protoceratium reticulatum long; Protoceratium reticulatum short; Protoperidinium americanum; Protoperidinium compressum; Protoperidinium nudum; Quenquecuspis concretum; Sample mass; see reference(s); Selenopemphix alticinctum; Slide volume; Spiniferites; Spiniferites bentori; Spiniferites bulloideus; Spiniferites delicatus; Spiniferites hyperacanthus; Spiniferites membranaceus; Spiniferites mirabilis; Spiniferites pachydermus; Spiniferites ramosus; Trinovantedinium capitatum; Tuberculodinium vancampoae; Vema Channel; Votadinium calvum; Votadinium spinosum  (1)
  • Benguela; Celtic_Sea; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; MARUM; MUC; MultiCorer; North_Sea; North Sea; NW_Africa  (1)
Document type
Keywords
Publisher
Years
  • 1
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    Unknown
    Dinoflagellate cysts in western equatorial Atlantic surface sediments (2000)
    PANGAEA
    In:  Supplement to: Vink, Annemiek; Zonneveld, Karin A F; Willems, Helmut (2000): Organic-walled dinoflagellate cysts in western equatorial Atlantic surface sediments: Distributions and their relation to environment. Review of Palaeobotany and Palynology, 112(4), 247-286, https://doi.org/10.1016/S0034-6667(00)00046-4
    Details
    Publication Date: 2024-02-02
    Description: In contrast to the wide range of studies carried out in temperate and high-latitude oceanic regions, only a few studies have focused on recent and Holocene organic-walled dinoflagellate cyst assemblages from the tropics. This information is, however, essential for fully understanding the ability of species to adapt to different oceanographic regimes, and ultimately their potential application to local and regional palaeoenvironmental and palaeoceanographic reconstructions. Surface sediment samples of the western equatorial Atlantic Ocean north of Brazil, an area greatly influenced by Amazon River discharge waters, were therefore analysed in detail for their organic-walled dinoflagellate cyst content. A diverse association of 43 taxa was identified, and large differences in cyst distribution were observed. The cyst thanatocoenosis in bottom sediments reflects the seasonal advection of Amazon River discharge water through the Guyana Current and the North Equatorial Countercurrent well into the North Atlantic. To establish potential links between cyst distribution and the environmental conditions of the upper water column, distribution patterns were compared with mean temperature, salinity, density and stratification gradients within the upper water column (0–100 m) over different times of the year, using correspondence analysis and canonical correspondence analysis. The analyses show that differences in these parameters only play a subordinate role in determining species distribution. Instead, nutrient availability, or related factors, dominates the distribution pattern. The only possible indicators of slightly reduced salinities are Trinovantedinium applanatum and Lingulodinium machaerophorum. Four assemblage groups of cyst taxa with similar environmental affinities related to specific water masses/currents can be distinguished and have potential for palaeoenvironmental reconstruction.
    Keywords: Amazon Fan; Amazon Shelf/Fan; Atlantic Caribbean Margin; Bitectatodinium spongium; Brazil Basin; Brigantedinium; Brigantedinium cariacoense; Ceara Rise; Continental slope off Brazil; Counting, dinoflagellate cysts; Dalella chathamensis; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Diplopelta symmetrica; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium spp.; Echinidinium transparantum; Elevation of event; Equatorial Atlantic; Event label; GeoB; GeoB3809-1; GeoB3810-2; GeoB3812-2; GeoB3822-1; GeoB3825-1; GeoB3826-2; GeoB3827-1; GeoB3906-9; GeoB3908-11; GeoB3909-1; GeoB3910-3; GeoB3911-1; GeoB3912-2; GeoB3913-2; GeoB3914-3; GeoB3916-1; GeoB3918-1; GeoB3925-2; GeoB3935-1; GeoB3936-2; GeoB3937-1; GeoB3938-2; GeoB3939-1; GeoB4306-1; GeoB4311-1; GeoB4319-11; GeoB4401-3; GeoB4404-2; GeoB4408-3; GeoB4412-3; GeoB4417-5; GeoB4418-2; GeoB4423-3; GeoB4424-2; Geosciences, University of Bremen; Guayana continental slope; Impagidinium aculeatum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sp.; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium variaseptum; Impagidinium velorum; Latitude of event; Lejeunecysta oliva; Lejeunecysta sabrina; Lingulodinium machaerophorum long; Lingulodinium machaerophorum short; Longitude of event; M34/3; M34/4; M38/1; M38/2; Melitasphaeridium; Meteor (1986); Midatlantic Ridge; Mid Atlantic Ridge; MUC; MultiCorer; Multispinula quanta; Nematosphaeropsis labyrinthus; Nematosphaeropsis lemniscata; Northeast Brasilian Margin; Northern Brasil Basin; Operculodinium; Operculodinium israelianum long; Operculodinium israelianum short; Pentapharsodinium dalei; Pixidinopsis reticulata; Polyspaeridium zoharyi; Protoceratium reticulatum long; Protoceratium reticulatum short; Protoperidinium americanum; Protoperidinium compressum; Protoperidinium nudum; Quenquecuspis concretum; Sample mass; see reference(s); Selenopemphix alticinctum; Slide volume; Spiniferites; Spiniferites bentori; Spiniferites bulloideus; Spiniferites delicatus; Spiniferites hyperacanthus; Spiniferites membranaceus; Spiniferites mirabilis; Spiniferites pachydermus; Spiniferites ramosus; Trinovantedinium capitatum; Tuberculodinium vancampoae; Vema Channel; Votadinium calvum; Votadinium spinosum
    Type: Dataset
    Format: text/tab-separated-values, 1938 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Absolute abundances of dinoflagellate cysts in surface sediment samples from four sites: Lycopodium marker-grain method (2009)
    PANGAEA
    In:  Supplement to: Mertens, Kenneth Neil; Verhoeven, Koen; Verleye, Thomas; Louwye, Stephen; Amorim, Ana; Ribeiro, Sofia; Deaf, Amr S; Harding, Ian C; De Schepper, Stijn; González, Catalina; Kodrans-Nsiah, Monika; de Vernal, Anne; Henry, Maryse; Radi, Taoufik; Dybkjaer, Karen; Poulsen, Niels E; Feist-Burkhardt, Susanne; Chitolie, Jonah; Heilmann-Clausen, Claus; Londeix, Laurent; Turon, Jean-Louis; Marret, Fabienne; Matthiessen, Jens; McCarthy, Francine M G; Prasad, Vandana; Pospelova, Vera; Hughes, Jane E Kyffin; Riding, James B; Rochon, André; Sangiorgi, Francesca; Welters, Natasja; Sinclair, Natalie; Thun, Christian; Soliman, Ali; Van Nieuwenhove, Nicolas; Vink, Annemiek; Young, Martin (2009): Determining the absolute abundance of dinoflagellate cysts in recent marine sediments: The Lycopodium marker-grain method put to the test. Review of Palaeobotany and Palynology, Review of Palaeobotany and Palynology, 157(3-4), 238-252, https://doi.org/10.1016/j.revpalbo.2009.05.004
    Details
    Publication Date: 2024-02-02
    Description: Absolute abundances (concentrations) of dinoflagellate cysts are often determined through the addition of Lycopodium clavatum marker-grains as a spike to a sample before palynological processing. An inter-laboratory calibration exercise was set up in order to test the comparability of results obtained in different laboratories, each using its own preparation method. Each of the 23 laboratories received the same amount of homogenized splits of four Quaternary sediment samples. The samples originate from different localities and consisted of a variety of lithologies. Dinoflagellate cysts were extracted and counted, and relative and absolute abundances were calculated. The relative abundances proved to be fairly reproducible, notwithstanding a need for taxonomic calibration. By contrast, excessive loss of Lycopodium spores during sample preparation resulted in non-reproducibility of absolute abundances. Use of oxidation, KOH, warm acids, acetolysis, mesh sizes larger than 15 µm and long ultrasonication (〉 1 min) must be avoided to determine reproducible absolute abundances. The results of this work therefore indicate that the dinoflagellate cyst worker should make a choice between using the proposed standard method which circumvents critical steps, adding Lycopodium tablets at the end of the preparation and using an alternative method.
    Keywords: Benguela; Celtic_Sea; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; MARUM; MUC; MultiCorer; North_Sea; North Sea; NW_Africa
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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