Determining the absolute abundance of dinoflagellate cysts in recent marine sediments: The Lycopodium marker-grain method put to the test

Kenneth Neil Mertens, Koen Verhoeven, Thomas Verleye, Stephen Louwye, Ana Amorim, Sofia Ribeiro, Amr S. Deaf, Ian C. Harding, Stijn De Schepper, Catalina González, Monika Kodrans-Nsiah, Anne De Vernal, Maryse Henry, Taoufik Radi, Karen Dybkjaer, Niels E. Poulsen, Susanne Feist-Burkhardt, Jonah Chitolie, Claus Heilmann-Clausen, Laurent LondeixJean Louis Turon, Fabienne Marret, Jens Matthiessen, Francine M.G. McCarthy, Vandana Prasad, Vera Pospelova, Jane E. Kyffin Hughes, James B. Riding, André Rochon, Francesca Sangiorgi, Natasja Welters, Natalie Sinclair, Christian Thun, Ali Soliman, Nicolas Van Nieuwenhove, Annemiek Vink, Martin Young

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)238-252
Number of pages15
JournalReview of Palaeobotany and Palynology
Volume157
Issue number3-4
DOIs
StatePublished - Nov 2009
Externally publishedYes

Keywords

  • Lycopodium clavatum tablets
  • concentration
  • dinoflagellate cyst
  • inter-laboratory calibration
  • spike

Fingerprint

Dive into the research topics of 'Determining the absolute abundance of dinoflagellate cysts in recent marine sediments: The Lycopodium marker-grain method put to the test'. Together they form a unique fingerprint.

Cite this