TY - JOUR
T1 - Ancient marine sediment DNA reveals diatom transition in Antarctica
AU - Armbrecht, Linda
AU - Weber, Michael E.
AU - Raymo, Maureen E.
AU - Peck, Victoria L.
AU - Williams, Trevor
AU - Warnock, Jonathan
AU - Kato, Yuji
AU - Hernández-Almeida, Iván
AU - Hoem, Frida
AU - Reilly, Brendan
AU - Hemming, Sidney
AU - Bailey, Ian
AU - Martos, Yasmina M.
AU - Gutjahr, Marcus
AU - Percuoco, Vincent
AU - Allen, Claire
AU - Brachfeld, Stefanie
AU - Cardillo, Fabricio G.
AU - Du, Zhiheng
AU - Fauth, Gerson
AU - Fogwill, Chris
AU - Garcia, Marga
AU - Glüder, Anna
AU - Guitard, Michelle
AU - Hwang, Ji Hwan
AU - Iizuka, Mutsumi
AU - Kenlee, Bridget
AU - O’Connell, Suzanne
AU - Pérez, Lara F.
AU - Ronge, Thomas A.
AU - Seki, Osamu
AU - Tauxe, Lisa
AU - Tripathi, Shubham
AU - Zheng, Xufeng
N1 - Funding Information:
This research used samples provided by the International Ocean Discovery Program (IODP). Funding for this research was provided by the Australian and New Zealand International Ocean Discovery Program Consortium (ANZIC) Post-Cruise Analytical Funding (PC_LArmbrecht_0120). L.A. was supported by ANZIC, The University of Adelaide, and an Australian Research Council (ARC) Discovery Early Career Researcher (DECRA) Fellowship (DE210100929). M.E.W. received funding by the Deutsche Forschungsgemeinschaft (DFG–Priority Programme 527, Grant We2039/17-1. Y.M.M. was supported by NASA under award number 80GSFC17M0002. US-based scientists M.R., T.W., J.P.W., B.R., S.H., Y.M.M., S.B., L.T., M.Guitard, A.G., B.L. and S.O.C. acknowledge post-expedition science awards from the IODP US Science Support program via National Science Foundation (NSF) grant OCE-1450528 and its subaward 97 (GG009393). F.H. acknowledges funding from the Dutch Research Council (NWO) polar programme (grant no. ALW.2016.001). L.F.P. had funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 792773 and the Natural Environment Research Council (NERC) UK-IODP programme under the grand NEB1782. We thank the IODP Exp. 382 crew and technical team for assistance during sampling, and Gustaaf Hallegraeff and Chris Bolch for their valuable feedback on the manuscript.
Funding Information:
This research used samples provided by the International Ocean Discovery Program (IODP). Funding for this research was provided by the Australian and New Zealand International Ocean Discovery Program Consortium (ANZIC) Post-Cruise Analytical Funding (PC_LArmbrecht_0120). L.A. was supported by ANZIC, The University of Adelaide, and an Australian Research Council (ARC) Discovery Early Career Researcher (DECRA) Fellowship (DE210100929). M.E.W. received funding by the Deutsche Forschungsgemeinschaft (DFG–Priority Programme 527, Grant We2039/17-1. Y.M.M. was supported by NASA under award number 80GSFC17M0002. US-based scientists M.R., T.W., J.P.W., B.R., S.H., Y.M.M., S.B., L.T., M.Guitard, A.G., B.L. and S.O.C. acknowledge post-expedition science awards from the IODP US Science Support program via National Science Foundation (NSF) grant OCE-1450528 and its subaward 97 (GG009393). F.H. acknowledges funding from the Dutch Research Council (NWO) polar programme (grant no. ALW.2016.001). L.F.P. had funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 792773 and the Natural Environment Research Council (NERC) UK-IODP programme under the grand NEB1782. We thank the IODP Exp. 382 crew and technical team for assistance during sampling, and Gustaaf Hallegraeff and Chris Bolch for their valuable feedback on the manuscript.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - 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 <10% of all eukaryotes prior to ~14.5 ka, to ~50% after this time, i.e., following Meltwater Pulse 1A, alongside a composition change from sea-ice to open-ocean species. Our study demonstrates that sedaDNA tools can be expanded to hundreds of thousands of years, opening the pathway to the study of ecosystem-wide marine shifts and paleo-productivity phases throughout multiple glacial-interglacial cycles.
AB - 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 <10% of all eukaryotes prior to ~14.5 ka, to ~50% after this time, i.e., following Meltwater Pulse 1A, alongside a composition change from sea-ice to open-ocean species. Our study demonstrates that sedaDNA tools can be expanded to hundreds of thousands of years, opening the pathway to the study of ecosystem-wide marine shifts and paleo-productivity phases throughout multiple glacial-interglacial cycles.
UR - http://www.scopus.com/inward/record.url?scp=85139127669&partnerID=8YFLogxK
U2 - 10.1038/s41467-022-33494-4
DO - 10.1038/s41467-022-33494-4
M3 - Article
C2 - 36184671
AN - SCOPUS:85139127669
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 5787
ER -
