Articles | Volume 16, issue 5
Ocean Sci., 16, 1017–1032, 2020
https://doi.org/10.5194/os-16-1017-2020
Ocean Sci., 16, 1017–1032, 2020
https://doi.org/10.5194/os-16-1017-2020

Research article 07 Sep 2020

Research article | 07 Sep 2020

Changes in the composition of marine and sea-ice diatoms derived from sedimentary ancient DNA of the eastern Fram Strait over the past 30 000 years

Heike H. Zimmermann et al.

Data sets

Diatom sedimentary ancient DNA metabarcoding from western Fram Strait and Kronotsky Peninsula, Dryad, Dataset Heike H. Zimmermann, Kathleen R. Stoof-Leichsenring, Stefan Kruse, Juliane Müller, Ruediger Stein, Ralf Tiedemann, and Ulrike Herzschuh https://doi.org/10.5061/dryad.bnzs7h481

Model code and software

R code for resampling and thus normalizing of count data to the minimum number of counts across a set of samples (e.g. sedaDNA sequence/pollen taxa counts per sample along a sediment core) S. Kruse https://github.com/StefanKruse/R_Rarefaction

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Short summary
This study targets high-resolution, diatom-specific sedimentary ancient DNA using a DNA metabarcoding approach. Diatom DNA has been preserved with substantial taxonomic richness in the eastern Fram Strait over the past 30 000 years with taxonomic composition being dominated by cold-water and sea-ice-associated diatoms. Taxonomic reorganisations took place after the Last Glacial Maximum and after the Younger Dryas. Peak proportions of pennate diatoms might indicate past sea-ice presence.