Ancient marine sediment DNA reveals diatom transition in Antarctica
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...
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ftcranfield:oai:dspace.lib.cranfield.ac.uk:1826/18543 2023-05-15T13:59:53+02:00 Ancient marine sediment DNA reveals diatom transition in Antarctica Armbrecht, Linda Weber, Michael E. Raymo, Maureen E. Fogwill, Chris 2022-10-02 https://doi.org/10.1038/s41467-022-33494-4 https://dspace.lib.cranfield.ac.uk/handle/1826/18543 en eng Springer Nature Armbrecht L, Weber ME, Raymo ME, et al., (2022) Ancient marine sediment DNA reveals diatom transition in Antarctica. Nature Communications, Volume 13, October 2022, Article number 5787 2041-1723 https://doi.org/10.1038/s41467-022-33494-4 https://dspace.lib.cranfield.ac.uk/handle/1826/18543 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Biodiversity Marine biology Metagenomics Palaeoceanography Palaeoecology Article 2022 ftcranfield https://doi.org/10.1038/s41467-022-33494-4 2023-03-23T23:39:21Z 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. Article in Journal/Newspaper Antarc* Antarctica Scotia Sea Sea ice Cranfield University: Collection of E-Research - CERES Scotia Sea Nature Communications 13 1 |
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Open Polar |
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Cranfield University: Collection of E-Research - CERES |
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ftcranfield |
language |
English |
topic |
Biodiversity Marine biology Metagenomics Palaeoceanography Palaeoecology |
spellingShingle |
Biodiversity Marine biology Metagenomics Palaeoceanography Palaeoecology Armbrecht, Linda Weber, Michael E. Raymo, Maureen E. Fogwill, Chris Ancient marine sediment DNA reveals diatom transition in Antarctica |
topic_facet |
Biodiversity Marine biology Metagenomics Palaeoceanography Palaeoecology |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Armbrecht, Linda Weber, Michael E. Raymo, Maureen E. Fogwill, Chris |
author_facet |
Armbrecht, Linda Weber, Michael E. Raymo, Maureen E. Fogwill, Chris |
author_sort |
Armbrecht, Linda |
title |
Ancient marine sediment DNA reveals diatom transition in Antarctica |
title_short |
Ancient marine sediment DNA reveals diatom transition in Antarctica |
title_full |
Ancient marine sediment DNA reveals diatom transition in Antarctica |
title_fullStr |
Ancient marine sediment DNA reveals diatom transition in Antarctica |
title_full_unstemmed |
Ancient marine sediment DNA reveals diatom transition in Antarctica |
title_sort |
ancient marine sediment dna reveals diatom transition in antarctica |
publisher |
Springer Nature |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41467-022-33494-4 https://dspace.lib.cranfield.ac.uk/handle/1826/18543 |
geographic |
Scotia Sea |
geographic_facet |
Scotia Sea |
genre |
Antarc* Antarctica Scotia Sea Sea ice |
genre_facet |
Antarc* Antarctica Scotia Sea Sea ice |
op_relation |
Armbrecht L, Weber ME, Raymo ME, et al., (2022) Ancient marine sediment DNA reveals diatom transition in Antarctica. Nature Communications, Volume 13, October 2022, Article number 5787 2041-1723 https://doi.org/10.1038/s41467-022-33494-4 https://dspace.lib.cranfield.ac.uk/handle/1826/18543 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/s41467-022-33494-4 |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
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1766268816394813440 |