Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone

The Southern Ocean, a region highly vulnerable to climate change, plays a vital role in regulating global nutrient cycles and atmospheric CO2 via the biological carbon pump. Diatoms, photosynthetically active plankton with dense opal skeletons, are key to this process as their exoskeletons are thoug...

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Autores: Williams, Jimmy R., Giering, Sarah, Baker, Christopher A., Pabortsava, Katsiaryna, Briggs, ‪Nathan, East, Holly, Espinola, Benoit, Blackbird, Sabena, Le Moigne, Frédéric, Villa Alfageme, María, Poulton, Alex J., Carvalho, Filipa, Pebody, Corinne, Saw, Kevin, Moore, C. Mark, Henson, Stephanie A., Sanders, Richard, Martin, Adrian P.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/165149
Acceso en línea:https://hdl.handle.net/11441/165149
https://doi.org/10.1038/s41561-024-01602-2
Access Level:acceso abierto
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spelling Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zoneWilliams, Jimmy R.Giering, SarahBaker, Christopher A.Pabortsava, KatsiarynaBriggs, ‪NathanEast, HollyEspinola, BenoitBlackbird, SabenaLe Moigne, FrédéricVilla Alfageme, MaríaPoulton, Alex J.Carvalho, FilipaPebody, CorinneSaw, KevinMoore, C. MarkHenson, Stephanie A.Sanders, RichardMartin, Adrian P.The Southern Ocean, a region highly vulnerable to climate change, plays a vital role in regulating global nutrient cycles and atmospheric CO2 via the biological carbon pump. Diatoms, photosynthetically active plankton with dense opal skeletons, are key to this process as their exoskeletons are thought to enhance the transfer of particulate organic carbon to depth, positioning them as major vectors of carbon storage. Yet conficting observations obscure the mechanistic link between diatoms, opal and particulate organic carbon fuxes, especially in the twilight zone where greatest fux losses occur. Here we present direct springtime fux measurements from diferent sectors of the subpolar Southern Ocean, demonstrating that across large areas of the subpolar twilight zone, carbon is efciently transferred to depth, albeit not by diatoms. Rather, opal is retained near the surface ocean, indicating that processes such as diatom buoyancy regulation and grazer repackaging can negate ballast efects of diatoms’ skeletons. Our results highlight that the presence of diatoms in surface waters of the Southern Ocean’s largest biome does not guarantee their importance as vectors for efcient carbon transfer through the subpolar twilight zone. Climate change-driven shifts in phytoplankton community composition may afect biologically sequestered carbon pools less than currently predicted.Springer NatureFísica Aplicada II2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/165149https://doi.org/10.1038/s41561-024-01602-2reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésNature Geoscience, 11, 1-14.https://doi.org/10.1038/s41561-024-01602-2info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1651492026-06-17T12:51:07Z
dc.title.none.fl_str_mv Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
title Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
spellingShingle Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
Williams, Jimmy R.
title_short Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
title_full Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
title_fullStr Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
title_full_unstemmed Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
title_sort Inefficient transfer of diatoms through the subpolar Southern Ocean twilight zone
dc.creator.none.fl_str_mv Williams, Jimmy R.
Giering, Sarah
Baker, Christopher A.
Pabortsava, Katsiaryna
Briggs, ‪Nathan
East, Holly
Espinola, Benoit
Blackbird, Sabena
Le Moigne, Frédéric
Villa Alfageme, María
Poulton, Alex J.
Carvalho, Filipa
Pebody, Corinne
Saw, Kevin
Moore, C. Mark
Henson, Stephanie A.
Sanders, Richard
Martin, Adrian P.
author Williams, Jimmy R.
author_facet Williams, Jimmy R.
Giering, Sarah
Baker, Christopher A.
Pabortsava, Katsiaryna
Briggs, ‪Nathan
East, Holly
Espinola, Benoit
Blackbird, Sabena
Le Moigne, Frédéric
Villa Alfageme, María
Poulton, Alex J.
Carvalho, Filipa
Pebody, Corinne
Saw, Kevin
Moore, C. Mark
Henson, Stephanie A.
Sanders, Richard
Martin, Adrian P.
author_role author
author2 Giering, Sarah
Baker, Christopher A.
Pabortsava, Katsiaryna
Briggs, ‪Nathan
East, Holly
Espinola, Benoit
Blackbird, Sabena
Le Moigne, Frédéric
Villa Alfageme, María
Poulton, Alex J.
Carvalho, Filipa
Pebody, Corinne
Saw, Kevin
Moore, C. Mark
Henson, Stephanie A.
Sanders, Richard
Martin, Adrian P.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Física Aplicada II
description The Southern Ocean, a region highly vulnerable to climate change, plays a vital role in regulating global nutrient cycles and atmospheric CO2 via the biological carbon pump. Diatoms, photosynthetically active plankton with dense opal skeletons, are key to this process as their exoskeletons are thought to enhance the transfer of particulate organic carbon to depth, positioning them as major vectors of carbon storage. Yet conficting observations obscure the mechanistic link between diatoms, opal and particulate organic carbon fuxes, especially in the twilight zone where greatest fux losses occur. Here we present direct springtime fux measurements from diferent sectors of the subpolar Southern Ocean, demonstrating that across large areas of the subpolar twilight zone, carbon is efciently transferred to depth, albeit not by diatoms. Rather, opal is retained near the surface ocean, indicating that processes such as diatom buoyancy regulation and grazer repackaging can negate ballast efects of diatoms’ skeletons. Our results highlight that the presence of diatoms in surface waters of the Southern Ocean’s largest biome does not guarantee their importance as vectors for efcient carbon transfer through the subpolar twilight zone. Climate change-driven shifts in phytoplankton community composition may afect biologically sequestered carbon pools less than currently predicted.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/165149
https://doi.org/10.1038/s41561-024-01602-2
url https://hdl.handle.net/11441/165149
https://doi.org/10.1038/s41561-024-01602-2
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Nature Geoscience, 11, 1-14.
https://doi.org/10.1038/s41561-024-01602-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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