Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica
Abstract Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WAIS). A 2.06 m composite sediment profile was recentl...
Published in: | ISME Communications |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1038/s43705-023-00216-w https://www.nature.com/articles/s43705-023-00216-w.pdf https://www.nature.com/articles/s43705-023-00216-w https://academic.oup.com/ismecommun/article-pdf/3/1/8/55143780/43705_2023_article_216.pdf |
id |
croxfordunivpr:10.1038/s43705-023-00216-w |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1038/s43705-023-00216-w 2024-09-09T19:10:11+00:00 Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica Davis, Christina L Venturelli, Ryan A Michaud, Alexander B Hawkings, Jon R Achberger, Amanda M Vick-Majors, Trista J Rosenheim, Brad E Dore, John E Steigmeyer, August Skidmore, Mark L Barker, Joel D Benning, Liane G Siegfried, Matthew R Priscu, John C Christner, Brent C Barbante, Carlo Bowling, Mark Burnett, Justin Campbell, Timothy Collins, Billy Dean, Cindy Duling, Dennis Fricker, Helen A Gagnon, Alan Gardner, Christopher Gibson, Dar Gustafson, Chloe Harwood, David Kalin, Jonas Kasic, Kathy Kim, Ok-Sun Krula, Edwin Leventer, Amy Li, Wei Lyons, W Berry McGill, Patrick McManis, James McPike, David Mironov, Anatoly Patterson, Molly Roberts, Graham Rot, James Trainor, Cathy Tranter, Martyn Winans, John Zook, Bob National Science Foundation All funding information is provided in the article file National Science Foundation All funding information is provided in the article file 2023 http://dx.doi.org/10.1038/s43705-023-00216-w https://www.nature.com/articles/s43705-023-00216-w.pdf https://www.nature.com/articles/s43705-023-00216-w https://academic.oup.com/ismecommun/article-pdf/3/1/8/55143780/43705_2023_article_216.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 ISME Communications volume 3, issue 1 ISSN 2730-6151 journal-article 2023 croxfordunivpr https://doi.org/10.1038/s43705-023-00216-w 2024-08-12T04:26:02Z Abstract Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WAIS). A 2.06 m composite sediment profile was recently recovered from Mercer Subglacial Lake, a 15 m deep water cavity beneath a 1087 m thick portion of the Mercer Ice Stream. We examined microbial abundances, used 16S rRNA gene amplicon sequencing to assess community structures, and characterized extracellular polymeric substances (EPS) associated with distinct lithologic units in the sediments. Bacterial and archaeal communities in the surficial sediments are more abundant and diverse, with significantly different compositions from those found deeper in the sediment column. The most abundant taxa are related to chemolithoautotrophs capable of oxidizing reduced nitrogen, sulfur, and iron compounds with oxygen, nitrate, or iron. Concentrations of dissolved methane and total organic carbon together with water content in the sediments are the strongest predictors of taxon and community composition. δ¹³C values for EPS (−25 to −30‰) are consistent with the primary source of carbon for biosynthesis originating from legacy marine organic matter. Comparison of communities to those in lake sediments under an adjacent ice stream (Whillans Subglacial Lake) and near its grounding zone provide seminal evidence for a subglacial metacommunity that is biogeochemically and evolutionarily linked through ice sheet dynamics and the transport of microbes, water, and sediments beneath WAIS. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Mercer Ice Stream Ross Ice Shelf West Antarctica Oxford University Press Antarctic Mercer ENVELOPE(65.647,65.647,-70.227,-70.227) Mercer Ice Stream ENVELOPE(-145.000,-145.000,-84.833,-84.833) Ross Ice Shelf West Antarctic Ice Sheet West Antarctica Whillans ENVELOPE(-64.250,-64.250,-84.450,-84.450) ISME Communications 3 1 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WAIS). A 2.06 m composite sediment profile was recently recovered from Mercer Subglacial Lake, a 15 m deep water cavity beneath a 1087 m thick portion of the Mercer Ice Stream. We examined microbial abundances, used 16S rRNA gene amplicon sequencing to assess community structures, and characterized extracellular polymeric substances (EPS) associated with distinct lithologic units in the sediments. Bacterial and archaeal communities in the surficial sediments are more abundant and diverse, with significantly different compositions from those found deeper in the sediment column. The most abundant taxa are related to chemolithoautotrophs capable of oxidizing reduced nitrogen, sulfur, and iron compounds with oxygen, nitrate, or iron. Concentrations of dissolved methane and total organic carbon together with water content in the sediments are the strongest predictors of taxon and community composition. δ¹³C values for EPS (−25 to −30‰) are consistent with the primary source of carbon for biosynthesis originating from legacy marine organic matter. Comparison of communities to those in lake sediments under an adjacent ice stream (Whillans Subglacial Lake) and near its grounding zone provide seminal evidence for a subglacial metacommunity that is biogeochemically and evolutionarily linked through ice sheet dynamics and the transport of microbes, water, and sediments beneath WAIS. |
author2 |
National Science Foundation All funding information is provided in the article file National Science Foundation All funding information is provided in the article file |
format |
Article in Journal/Newspaper |
author |
Davis, Christina L Venturelli, Ryan A Michaud, Alexander B Hawkings, Jon R Achberger, Amanda M Vick-Majors, Trista J Rosenheim, Brad E Dore, John E Steigmeyer, August Skidmore, Mark L Barker, Joel D Benning, Liane G Siegfried, Matthew R Priscu, John C Christner, Brent C Barbante, Carlo Bowling, Mark Burnett, Justin Campbell, Timothy Collins, Billy Dean, Cindy Duling, Dennis Fricker, Helen A Gagnon, Alan Gardner, Christopher Gibson, Dar Gustafson, Chloe Harwood, David Kalin, Jonas Kasic, Kathy Kim, Ok-Sun Krula, Edwin Leventer, Amy Li, Wei Lyons, W Berry McGill, Patrick McManis, James McPike, David Mironov, Anatoly Patterson, Molly Roberts, Graham Rot, James Trainor, Cathy Tranter, Martyn Winans, John Zook, Bob |
spellingShingle |
Davis, Christina L Venturelli, Ryan A Michaud, Alexander B Hawkings, Jon R Achberger, Amanda M Vick-Majors, Trista J Rosenheim, Brad E Dore, John E Steigmeyer, August Skidmore, Mark L Barker, Joel D Benning, Liane G Siegfried, Matthew R Priscu, John C Christner, Brent C Barbante, Carlo Bowling, Mark Burnett, Justin Campbell, Timothy Collins, Billy Dean, Cindy Duling, Dennis Fricker, Helen A Gagnon, Alan Gardner, Christopher Gibson, Dar Gustafson, Chloe Harwood, David Kalin, Jonas Kasic, Kathy Kim, Ok-Sun Krula, Edwin Leventer, Amy Li, Wei Lyons, W Berry McGill, Patrick McManis, James McPike, David Mironov, Anatoly Patterson, Molly Roberts, Graham Rot, James Trainor, Cathy Tranter, Martyn Winans, John Zook, Bob Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
author_facet |
Davis, Christina L Venturelli, Ryan A Michaud, Alexander B Hawkings, Jon R Achberger, Amanda M Vick-Majors, Trista J Rosenheim, Brad E Dore, John E Steigmeyer, August Skidmore, Mark L Barker, Joel D Benning, Liane G Siegfried, Matthew R Priscu, John C Christner, Brent C Barbante, Carlo Bowling, Mark Burnett, Justin Campbell, Timothy Collins, Billy Dean, Cindy Duling, Dennis Fricker, Helen A Gagnon, Alan Gardner, Christopher Gibson, Dar Gustafson, Chloe Harwood, David Kalin, Jonas Kasic, Kathy Kim, Ok-Sun Krula, Edwin Leventer, Amy Li, Wei Lyons, W Berry McGill, Patrick McManis, James McPike, David Mironov, Anatoly Patterson, Molly Roberts, Graham Rot, James Trainor, Cathy Tranter, Martyn Winans, John Zook, Bob |
author_sort |
Davis, Christina L |
title |
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
title_short |
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
title_full |
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
title_fullStr |
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
title_full_unstemmed |
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica |
title_sort |
biogeochemical and historical drivers of microbial community composition and structure in sediments from mercer subglacial lake, west antarctica |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1038/s43705-023-00216-w https://www.nature.com/articles/s43705-023-00216-w.pdf https://www.nature.com/articles/s43705-023-00216-w https://academic.oup.com/ismecommun/article-pdf/3/1/8/55143780/43705_2023_article_216.pdf |
long_lat |
ENVELOPE(65.647,65.647,-70.227,-70.227) ENVELOPE(-145.000,-145.000,-84.833,-84.833) ENVELOPE(-64.250,-64.250,-84.450,-84.450) |
geographic |
Antarctic Mercer Mercer Ice Stream Ross Ice Shelf West Antarctic Ice Sheet West Antarctica Whillans |
geographic_facet |
Antarctic Mercer Mercer Ice Stream Ross Ice Shelf West Antarctic Ice Sheet West Antarctica Whillans |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Mercer Ice Stream Ross Ice Shelf West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Mercer Ice Stream Ross Ice Shelf West Antarctica |
op_source |
ISME Communications volume 3, issue 1 ISSN 2730-6151 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1038/s43705-023-00216-w |
container_title |
ISME Communications |
container_volume |
3 |
container_issue |
1 |
_version_ |
1809824777953607680 |