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Absolute abundances of dinoflagellate cysts in surface sediment samples from four sites: Lycopodium marker-grain method (2009)

Mertens, Kenneth Neil ; Verhoeven, Koen ; Verleye, Thomas ; [et al.]

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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

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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

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Absolute abundances of dinoflagellate cysts insurface sediment samples from the Benguela site (2009)

Mertens, Kenneth Neil ; Verhoeven, Koen ; Verleye, Thomas ; [et al.]

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Publication Date: 2024-02-02

Keywords: Benguela; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; Laboratory; Lycopodium marker-grain method; MARUM; Species

Type: Dataset

Format: text/tab-separated-values, 14353 data points

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Alkenone concentration and sea surface temperature (SST) analysis from borhole Sdr Cvdium (2020)

Herbert, Timothy D ; Rose, Rebecca ; Dybkjaer, Karen ; [et al.]

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Publication Date: 2024-04-18

Keywords: AGE; Age model; Alkenone, C37; Alkenone, unsaturation index UK'37; BACON age modeling; Calculated from UK'37 (Müller et al, 1998); CDRILL; Core drilling; Depth, corrected; DEPTH, sediment/rock; Miocene; Miocene Climatic Optimum; Sdr_Vdium; Sea surface temperature; Sea surface temperature, annual mean; Tierney & Tingley 2018 calibration, Bayesian prior = 3 METHOD: SST, from UK'37; Tierney & Tingley 2018 calibration, Bayesian prior = 5 METHOD: SST, from UK'37

Type: Dataset

Format: text/tab-separated-values, 780 data points

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