Ancient marine sediment DNA reveals diatom transition in Antarctica

Linda Armbrecht (), Michael E. Weber, Maureen E. Raymo, Victoria L. Peck, Trevor Williams, Jonathan Warnock, Yuji Kato, Iván Hernández-Almeida, Frida Hoem, Brendan Reilly, Sidney Hemming, Ian Bailey, Yasmina M. Martos, Marcus Gutjahr, Vincent Percuoco, Claire Allen, Stefanie Brachfeld, Fabricio G. Cardillo, Zhiheng Du, Gerson Fauth, Chris Fogwill, Marga Garcia, Anna Glüder, Michelle Guitard, Ji-Hwan Hwang, Mutsumi Iizuka, Bridget Kenlee, Suzanne O’Connell, Lara F. Pérez, Thomas A. Ronge, Osamu Seki, Lisa Tauxe, Shubham Tripathi and Xufeng Zheng
Additional contact information
Linda Armbrecht: University of Tasmania
Michael E. Weber: University of Bonn, Institute for Geosciences, Department of Geochemistry and Petrology
Maureen E. Raymo: Columbia University
Victoria L. Peck: British Antarctic Survey
Trevor Williams: Texas A&M University
Jonathan Warnock: Indiana University of Pennsylvania
Yuji Kato: University of Tsukuba
Iván Hernández-Almeida: ETH Zürich, Geological Institute, Department of Earth Science
Frida Hoem: Utrecht University
Brendan Reilly: University of California San Diego
Sidney Hemming: Columbia University
Ian Bailey: Camborne School of Mines, University of Exeter
Yasmina M. Martos: Planetary Magnetospheres Laboratory (695), NASA Goddard Space Flight Center
Marcus Gutjahr: GEOMAR Helmholtz Centre for Ocean Research Kiel
Vincent Percuoco: Texas A&M University
Claire Allen: British Antarctic Survey
Stefanie Brachfeld: Montclair State University
Fabricio G. Cardillo: Servicio de Hidrografia Naval
Zhiheng Du: Chinese Academy of Sciences
Gerson Fauth: University of Vale do Rio dos Sinos
Chris Fogwill: Cranfield University
Marga Garcia: Cadiz Oceanographic Center (IEO-CSIC)
Anna Glüder: Oregon State University
Michelle Guitard: University of South Florida
Ji-Hwan Hwang: Korea Basic Science Institute
Mutsumi Iizuka: Tokyo City University
Bridget Kenlee: University of California Riverside
Suzanne O’Connell: Wesleyan University
Lara F. Pérez: Geological Survey of Denmark and Greenland, Department of Marine Geology
Thomas A. Ronge: Helmholtz Center for Polar and Marine Research
Osamu Seki: Hokkaido University
Lisa Tauxe: University of California San Diego
Shubham Tripathi: Ministry of Earth Sciences
Xufeng Zheng: Hainan University

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract Antarctica is one of the most vulnerable regions to climate change on Earth and studying the past and present responses of this polar marine ecosystem to environmental change is a matter of urgency. Sedimentary ancient DNA (sedaDNA) analysis can provide such insights into past ecosystem-wide changes. Here we present authenticated (through extensive contamination control and sedaDNA damage analysis) metagenomic marine eukaryote sedaDNA from the Scotia Sea region acquired during IODP Expedition 382. We also provide a marine eukaryote sedaDNA record of ~1 Mio. years and diatom and chlorophyte sedaDNA dating back to ~540 ka (using taxonomic marker genes SSU, LSU, psbO). We find evidence of warm phases being associated with high relative diatom abundance, and a marked transition from diatoms comprising

Date: 2022
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DOI: 10.1038/s41467-022-33494-4

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