Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump
International audience Diatoms play a major role in carbon export from surface waters, but their role in the transport of carbon to the deep sea has been questioned by global analyses of sediment trap fluxes which suggest that organic carbon fluxes and transfer efficiencies through the mesopelagic a...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
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Subjects: | |
Online Access: | https://hal.univ-brest.fr/hal-00473808 https://hal.univ-brest.fr/hal-00473808/document https://hal.univ-brest.fr/hal-00473808/file/2006GB002688.pdf https://doi.org/10.1029/2006GB002688 |
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English |
topic |
BIOGENIC SILICA DISSOLUTION PARTICULATE ORGANIC-CARBON TRANSPARENT EXOPOLYMER PARTICLES PHYTOPLANKTON-DERIVED DETRITUS SOUTHERN-OCEAN MARINE SNOW FECAL PELLETS THALASSIOSIRA-PSEUDONANA CELL-CYCLE MICROBIAL AGGREGATION [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
BIOGENIC SILICA DISSOLUTION PARTICULATE ORGANIC-CARBON TRANSPARENT EXOPOLYMER PARTICLES PHYTOPLANKTON-DERIVED DETRITUS SOUTHERN-OCEAN MARINE SNOW FECAL PELLETS THALASSIOSIRA-PSEUDONANA CELL-CYCLE MICROBIAL AGGREGATION [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Ragueneau, Olivier Schultes, Sabine Bidle, Kay Claquin, Pascal Moriceau, Brivaëla Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
topic_facet |
BIOGENIC SILICA DISSOLUTION PARTICULATE ORGANIC-CARBON TRANSPARENT EXOPOLYMER PARTICLES PHYTOPLANKTON-DERIVED DETRITUS SOUTHERN-OCEAN MARINE SNOW FECAL PELLETS THALASSIOSIRA-PSEUDONANA CELL-CYCLE MICROBIAL AGGREGATION [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Diatoms play a major role in carbon export from surface waters, but their role in the transport of carbon to the deep sea has been questioned by global analyses of sediment trap fluxes which suggest that organic carbon fluxes and transfer efficiencies through the mesopelagic are tightly correlated with CaCO3 ( Klaas and Archer, 2002; Franc, ois et al., 2002). Here we explore the role of diatoms in the biological pump through a study of Si and C interactions from the molecular to the global scale. Recent findings on molecular interactions between Si and C are reviewed. The roles of bacteria, grazers and aggregation are explored and combined, to account for the extent of Si and C decoupling between surface waters and 1000 m, observed to be very homogeneous in different biogeochemical provinces of the ocean. It is suggested that the mesopelagic food web plays a crucial role in this homogeneity: Sites of high export are also sites where diatom C is being either remineralized or channeled toward the long-lived carbon pool most efficiently in the mesopelagic zone. The amount of carbon participating in the biological pump but not collected in sediment traps remains to be explored. It is also demonstrated that statistical analyses performed at global scales hide spatial variability in carrying coefficients, indicating a clear need to understand the mechanisms that control spatial and temporal variations in the relative importance of ballast minerals and other export mechanisms such as particle dynamics. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Marine and Coastal Sciences (IMCS) Rutgers, The State University of New Jersey New Brunswick (RU) Rutgers University System (Rutgers)-Rutgers University System (Rutgers) Physiologie et Ecophysiologie des Mollusques Marins (PE2M) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) Marine Sciences Research center Stony Brook University SUNY (SBU) State University of New York (SUNY)-State University of New York (SUNY) |
format |
Article in Journal/Newspaper |
author |
Ragueneau, Olivier Schultes, Sabine Bidle, Kay Claquin, Pascal Moriceau, Brivaëla |
author_facet |
Ragueneau, Olivier Schultes, Sabine Bidle, Kay Claquin, Pascal Moriceau, Brivaëla |
author_sort |
Ragueneau, Olivier |
title |
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
title_short |
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
title_full |
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
title_fullStr |
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
title_full_unstemmed |
Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump |
title_sort |
si and c interactions in the world ocean: importance of ecological processes and implications for the role of diatoms in the biological pump |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.univ-brest.fr/hal-00473808 https://hal.univ-brest.fr/hal-00473808/document https://hal.univ-brest.fr/hal-00473808/file/2006GB002688.pdf https://doi.org/10.1029/2006GB002688 |
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ENVELOPE(162.867,162.867,-76.850,-76.850) |
geographic |
Archer Southern Ocean |
geographic_facet |
Archer Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.univ-brest.fr/hal-00473808 Global Biogeochemical Cycles, American Geophysical Union, 2006, 20 (4), pp.GB4S02. ⟨10.1029/2006GB002688⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GB002688 hal-00473808 https://hal.univ-brest.fr/hal-00473808 https://hal.univ-brest.fr/hal-00473808/document https://hal.univ-brest.fr/hal-00473808/file/2006GB002688.pdf doi:10.1029/2006GB002688 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2006GB002688 |
container_title |
Global Biogeochemical Cycles |
container_volume |
20 |
container_issue |
4 |
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ftccsdartic:oai:HAL:hal-00473808v1 2023-05-15T18:25:47+02:00 Si and C interactions in the world ocean: Importance of ecological processes and implications for the role of diatoms in the biological pump Ragueneau, Olivier Schultes, Sabine Bidle, Kay Claquin, Pascal Moriceau, Brivaëla Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Marine and Coastal Sciences (IMCS) Rutgers, The State University of New Jersey New Brunswick (RU) Rutgers University System (Rutgers)-Rutgers University System (Rutgers) Physiologie et Ecophysiologie des Mollusques Marins (PE2M) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) Marine Sciences Research center Stony Brook University SUNY (SBU) State University of New York (SUNY)-State University of New York (SUNY) 2006-12-21 https://hal.univ-brest.fr/hal-00473808 https://hal.univ-brest.fr/hal-00473808/document https://hal.univ-brest.fr/hal-00473808/file/2006GB002688.pdf https://doi.org/10.1029/2006GB002688 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2006GB002688 hal-00473808 https://hal.univ-brest.fr/hal-00473808 https://hal.univ-brest.fr/hal-00473808/document https://hal.univ-brest.fr/hal-00473808/file/2006GB002688.pdf doi:10.1029/2006GB002688 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.univ-brest.fr/hal-00473808 Global Biogeochemical Cycles, American Geophysical Union, 2006, 20 (4), pp.GB4S02. ⟨10.1029/2006GB002688⟩ BIOGENIC SILICA DISSOLUTION PARTICULATE ORGANIC-CARBON TRANSPARENT EXOPOLYMER PARTICLES PHYTOPLANKTON-DERIVED DETRITUS SOUTHERN-OCEAN MARINE SNOW FECAL PELLETS THALASSIOSIRA-PSEUDONANA CELL-CYCLE MICROBIAL AGGREGATION [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2006 ftccsdartic https://doi.org/10.1029/2006GB002688 2021-12-19T00:07:17Z International audience Diatoms play a major role in carbon export from surface waters, but their role in the transport of carbon to the deep sea has been questioned by global analyses of sediment trap fluxes which suggest that organic carbon fluxes and transfer efficiencies through the mesopelagic are tightly correlated with CaCO3 ( Klaas and Archer, 2002; Franc, ois et al., 2002). Here we explore the role of diatoms in the biological pump through a study of Si and C interactions from the molecular to the global scale. Recent findings on molecular interactions between Si and C are reviewed. The roles of bacteria, grazers and aggregation are explored and combined, to account for the extent of Si and C decoupling between surface waters and 1000 m, observed to be very homogeneous in different biogeochemical provinces of the ocean. It is suggested that the mesopelagic food web plays a crucial role in this homogeneity: Sites of high export are also sites where diatom C is being either remineralized or channeled toward the long-lived carbon pool most efficiently in the mesopelagic zone. The amount of carbon participating in the biological pump but not collected in sediment traps remains to be explored. It is also demonstrated that statistical analyses performed at global scales hide spatial variability in carrying coefficients, indicating a clear need to understand the mechanisms that control spatial and temporal variations in the relative importance of ballast minerals and other export mechanisms such as particle dynamics. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Archer ENVELOPE(162.867,162.867,-76.850,-76.850) Southern Ocean Global Biogeochemical Cycles 20 4 n/a n/a |