Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean
International audience Upper ocean plankton assemblages are known to influence the export of carbon and biominerals from the mixed layer. However, relationships between plankton community structure and the magnitude and stoichiometry of export remain poorly characterized. We present data on biogeoch...
Published in: | Polar Biology |
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Online Access: | https://hal.sorbonne-universite.fr/hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390/document https://hal.sorbonne-universite.fr/hal-01579390/file/Rembauville_revized_final.pdf https://doi.org/10.1007/s00300-017-2167-3 |
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ftsorbonneuniv:oai:HAL:hal-01579390v1 2024-06-23T07:56:18+00:00 Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean Rembauville, M. Salter, I. Dehairs, F. Miquel, J.-C. Blain, S. Laboratoire d'Océanographie Microbienne (LOMIC) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Vrije Universiteit Brussel Bruxelles (VUB) Marine Environment Laboratories Monaco (IAEA-MEL) International Atomic Energy Agency Vienna (IAEA) 2017 https://hal.sorbonne-universite.fr/hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390/document https://hal.sorbonne-universite.fr/hal-01579390/file/Rembauville_revized_final.pdf https://doi.org/10.1007/s00300-017-2167-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-017-2167-3 hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390/document https://hal.sorbonne-universite.fr/hal-01579390/file/Rembauville_revized_final.pdf doi:10.1007/s00300-017-2167-3 info:eu-repo/semantics/OpenAccess ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.sorbonne-universite.fr/hal-01579390 Polar Biology, 2017, ⟨10.1007/s00300-017-2167-3⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2017 ftsorbonneuniv https://doi.org/10.1007/s00300-017-2167-3 2024-05-30T23:52:03Z International audience Upper ocean plankton assemblages are known to influence the export of carbon and biominerals from the mixed layer. However, relationships between plankton community structure and the magnitude and stoichiometry of export remain poorly characterized. We present data on biogeochemical and diatom export fluxes from the annual deployment of a sediment trap in a High Nutrient, Low Chlorophyll (HNLC) area upstream of the Kerguelen Plateau (KERFIX station). The weak and tidal-driven circulation provided favorable conditions for a quantitative analysis of export processes. Particulate organic carbon (POC) fluxes were highest in spring and summer. Biogenic silica (BSi) fluxes displayed similar seasonal patterns, although BSi:POC ratios were elevated in winter. Fragilariopsis kerguelensis dominated the annual diatom export assemblage (59.8% of the total valve flux). We identified clusters of diatom species that were positively or negatively correlated to the BSi:POC ratio. Our results indicate that the differential role of certain diatom species for carbon and silicon export, previously identified from iron-fertilized productive areas, is also valid in HNLC regimes. Although annual POC export below the mixed layer of the HNLC site is twofold lower that the one previously reported in a naturally iron-fertilized area of the Kerguelen Plateau, the fraction of seasonal net community production exported is similar at both sites (~1.5%). These findings suggest that natural iron fertilization increases the strength but not the efficiency of carbon export from the mixed layer. Article in Journal/Newspaper Polar Biology Southern Ocean HAL Sorbonne Université Kerguelen Southern Ocean Polar Biology 41 1 25 40 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Rembauville, M. Salter, I. Dehairs, F. Miquel, J.-C. Blain, S. Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Upper ocean plankton assemblages are known to influence the export of carbon and biominerals from the mixed layer. However, relationships between plankton community structure and the magnitude and stoichiometry of export remain poorly characterized. We present data on biogeochemical and diatom export fluxes from the annual deployment of a sediment trap in a High Nutrient, Low Chlorophyll (HNLC) area upstream of the Kerguelen Plateau (KERFIX station). The weak and tidal-driven circulation provided favorable conditions for a quantitative analysis of export processes. Particulate organic carbon (POC) fluxes were highest in spring and summer. Biogenic silica (BSi) fluxes displayed similar seasonal patterns, although BSi:POC ratios were elevated in winter. Fragilariopsis kerguelensis dominated the annual diatom export assemblage (59.8% of the total valve flux). We identified clusters of diatom species that were positively or negatively correlated to the BSi:POC ratio. Our results indicate that the differential role of certain diatom species for carbon and silicon export, previously identified from iron-fertilized productive areas, is also valid in HNLC regimes. Although annual POC export below the mixed layer of the HNLC site is twofold lower that the one previously reported in a naturally iron-fertilized area of the Kerguelen Plateau, the fraction of seasonal net community production exported is similar at both sites (~1.5%). These findings suggest that natural iron fertilization increases the strength but not the efficiency of carbon export from the mixed layer. |
author2 |
Laboratoire d'Océanographie Microbienne (LOMIC) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Vrije Universiteit Brussel Bruxelles (VUB) Marine Environment Laboratories Monaco (IAEA-MEL) International Atomic Energy Agency Vienna (IAEA) |
format |
Article in Journal/Newspaper |
author |
Rembauville, M. Salter, I. Dehairs, F. Miquel, J.-C. Blain, S. |
author_facet |
Rembauville, M. Salter, I. Dehairs, F. Miquel, J.-C. Blain, S. |
author_sort |
Rembauville, M. |
title |
Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
title_short |
Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
title_full |
Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
title_fullStr |
Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
title_full_unstemmed |
Annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the Southern Ocean |
title_sort |
annual particulate matter and diatom export in a high nutrient, low chlorophyll area of the southern ocean |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.sorbonne-universite.fr/hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390/document https://hal.sorbonne-universite.fr/hal-01579390/file/Rembauville_revized_final.pdf https://doi.org/10.1007/s00300-017-2167-3 |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Polar Biology Southern Ocean |
genre_facet |
Polar Biology Southern Ocean |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.sorbonne-universite.fr/hal-01579390 Polar Biology, 2017, ⟨10.1007/s00300-017-2167-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-017-2167-3 hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390 https://hal.sorbonne-universite.fr/hal-01579390/document https://hal.sorbonne-universite.fr/hal-01579390/file/Rembauville_revized_final.pdf doi:10.1007/s00300-017-2167-3 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00300-017-2167-3 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
1 |
container_start_page |
25 |
op_container_end_page |
40 |
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1802649314301837312 |