From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01)
With ongoing climate change, research into the biological changes occurring in particularly vulnerable ecosystems, such as Antarctica, is critical. The Totten Glacier region, Sabrina Coast, is currently experiencing some of the highest rates of thinning across all East Antarctica. An assessment of t...
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American Geophysical Union
2023
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Online Access: | https://hdl.handle.net/2440/141366 https://doi.org/10.1029/2022JG007252 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/141366 2024-09-09T19:03:58+00:00 From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) Armbrecht, L. Focardi, A. Lawler, K.A. O’Brien, P. Leventer, A. Noble, T.L. Opdyke, B. Duffy, M. Evangelinos, D. George, S.C. Lieser, J. López-Quirós, A. Post, A. Ostrowski, M. Paulsen, I. Armand, L. 2023 application/pdf https://hdl.handle.net/2440/141366 https://doi.org/10.1029/2022JG007252 en eng American Geophysical Union http://purl.org/au-research/grants/arc/DP170100557 http://purl.org/au-research/grants/arc/DE210100929 http://purl.org/au-research/grants/arc/FL140100021 Journal of Geophysical Research: Biogeosciences, 2023; 128(4):e2022JG007252-1-e2022JG007252-20 2169-8953 2169-8961 https://hdl.handle.net/2440/141366 doi:10.1029/2022JG007252 Armbrecht, L. [0000-0002-1213-1257] © 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. http://dx.doi.org/10.1029/2022jg007252 Journal article 2023 ftunivadelaidedl https://doi.org/10.1029/2022JG00725210.1029/2022jg007252 2024-06-25T14:16:55Z With ongoing climate change, research into the biological changes occurring in particularly vulnerable ecosystems, such as Antarctica, is critical. The Totten Glacier region, Sabrina Coast, is currently experiencing some of the highest rates of thinning across all East Antarctica. An assessment of the microscopic organisms supporting the ecosystem of the marginal sea-ice zone over the continental rise is important, yet there is a lack of knowledge about the diversity and distribution of these organisms throughout the water column, and their occurrence and/or preservation in the underlying sediments. Here, we provide a taxonomic overview of the modern and ancient marine bacterial and eukaryotic communities of the Totten Glacier region, using a combination of 16S and 18S rRNA amplicon sequencing (modern DNA) and shotgun metagenomics (sedimentary ancient DNA, sedaDNA). Our data show considerable differences between eukaryote and bacterial signals in the water column versus the sediments. Proteobacteria and diatoms dominate the bacterial and eukaryote composition in the upper water column, while diatoms, dinoflagellates, and haptophytes notably decrease in relative abundance with increasing water depth. Little diatom sedaDNA is preserved in the sediments, which are instead dominated by Proteobacteria and Retaria. We compare the diatom microfossil and sedaDNA record and link the weak preservation of diatom sedaDNA to DNA degradation while sinking through the water column to the seafloor. This study provides the first assessment of DNA transfer from ocean waters to sediments and an overview of the microscopic communities occurring in the climatically important Totten Glacier region. Linda Armbrecht, Amaranta Focardi, Kelly-Anne Lawler, Phil O, Brien, Amy Leventer, Taryn L. Noble, Bradley Opdyke, Meghan Duffy, Dimitris Evangelinos, Simon C. George, Jan Lieser, Adrián López-Quirós, Alix Post, Martin Ostrowski, Ian Paulsen, and Leanne Armand Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Totten Glacier The University of Adelaide: Digital Library East Antarctica Sabrina Coast ENVELOPE(118.550,118.550,-67.000,-67.000) Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
With ongoing climate change, research into the biological changes occurring in particularly vulnerable ecosystems, such as Antarctica, is critical. The Totten Glacier region, Sabrina Coast, is currently experiencing some of the highest rates of thinning across all East Antarctica. An assessment of the microscopic organisms supporting the ecosystem of the marginal sea-ice zone over the continental rise is important, yet there is a lack of knowledge about the diversity and distribution of these organisms throughout the water column, and their occurrence and/or preservation in the underlying sediments. Here, we provide a taxonomic overview of the modern and ancient marine bacterial and eukaryotic communities of the Totten Glacier region, using a combination of 16S and 18S rRNA amplicon sequencing (modern DNA) and shotgun metagenomics (sedimentary ancient DNA, sedaDNA). Our data show considerable differences between eukaryote and bacterial signals in the water column versus the sediments. Proteobacteria and diatoms dominate the bacterial and eukaryote composition in the upper water column, while diatoms, dinoflagellates, and haptophytes notably decrease in relative abundance with increasing water depth. Little diatom sedaDNA is preserved in the sediments, which are instead dominated by Proteobacteria and Retaria. We compare the diatom microfossil and sedaDNA record and link the weak preservation of diatom sedaDNA to DNA degradation while sinking through the water column to the seafloor. This study provides the first assessment of DNA transfer from ocean waters to sediments and an overview of the microscopic communities occurring in the climatically important Totten Glacier region. Linda Armbrecht, Amaranta Focardi, Kelly-Anne Lawler, Phil O, Brien, Amy Leventer, Taryn L. Noble, Bradley Opdyke, Meghan Duffy, Dimitris Evangelinos, Simon C. George, Jan Lieser, Adrián López-Quirós, Alix Post, Martin Ostrowski, Ian Paulsen, and Leanne Armand |
format |
Article in Journal/Newspaper |
author |
Armbrecht, L. Focardi, A. Lawler, K.A. O’Brien, P. Leventer, A. Noble, T.L. Opdyke, B. Duffy, M. Evangelinos, D. George, S.C. Lieser, J. López-Quirós, A. Post, A. Ostrowski, M. Paulsen, I. Armand, L. |
spellingShingle |
Armbrecht, L. Focardi, A. Lawler, K.A. O’Brien, P. Leventer, A. Noble, T.L. Opdyke, B. Duffy, M. Evangelinos, D. George, S.C. Lieser, J. López-Quirós, A. Post, A. Ostrowski, M. Paulsen, I. Armand, L. From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
author_facet |
Armbrecht, L. Focardi, A. Lawler, K.A. O’Brien, P. Leventer, A. Noble, T.L. Opdyke, B. Duffy, M. Evangelinos, D. George, S.C. Lieser, J. López-Quirós, A. Post, A. Ostrowski, M. Paulsen, I. Armand, L. |
author_sort |
Armbrecht, L. |
title |
From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
title_short |
From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
title_full |
From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
title_fullStr |
From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
title_full_unstemmed |
From the Surface Ocean to the Seafloor: Linking Modern and Paleo-Genetics at the Sabrina Coast, East Antarctica (IN2017_V01) |
title_sort |
from the surface ocean to the seafloor: linking modern and paleo-genetics at the sabrina coast, east antarctica (in2017_v01) |
publisher |
American Geophysical Union |
publishDate |
2023 |
url |
https://hdl.handle.net/2440/141366 https://doi.org/10.1029/2022JG007252 |
long_lat |
ENVELOPE(118.550,118.550,-67.000,-67.000) ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
East Antarctica Sabrina Coast Totten Glacier |
geographic_facet |
East Antarctica Sabrina Coast Totten Glacier |
genre |
Antarc* Antarctica East Antarctica Sea ice Totten Glacier |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice Totten Glacier |
op_source |
http://dx.doi.org/10.1029/2022jg007252 |
op_relation |
http://purl.org/au-research/grants/arc/DP170100557 http://purl.org/au-research/grants/arc/DE210100929 http://purl.org/au-research/grants/arc/FL140100021 Journal of Geophysical Research: Biogeosciences, 2023; 128(4):e2022JG007252-1-e2022JG007252-20 2169-8953 2169-8961 https://hdl.handle.net/2440/141366 doi:10.1029/2022JG007252 Armbrecht, L. [0000-0002-1213-1257] |
op_rights |
© 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
op_doi |
https://doi.org/10.1029/2022JG00725210.1029/2022jg007252 |
_version_ |
1809817966639841280 |