Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau
International audience We report the contribution of planktic foraminifers and coccoliths to the particulate inorganic carbon (PIC) export fluxes collected over an annual cycle (October 2011/September 2012) on the central Kerguelen Plateau in the Antarctic Zone (AAZ) south of the Polar Front (PF). T...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2016
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671/document https://hal.sorbonne-universite.fr/hal-01291671/file/Rembauville_2016_Planktic.pdf https://doi.org/10.1016/j.dsr.2016.02.017 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
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. Meilland, J. Ziveri, P. Schiebel, R. Blain, S. Salter, I. Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience We report the contribution of planktic foraminifers and coccoliths to the particulate inorganic carbon (PIC) export fluxes collected over an annual cycle (October 2011/September 2012) on the central Kerguelen Plateau in the Antarctic Zone (AAZ) south of the Polar Front (PF). The seasonality of PIC flux was decoupled from surface chlorophyll a concentration and particulate organic carbon (POC) fluxes and was characterized by a late summer (February) maximum. This peak was concomitant with the highest satellite-derived sea surface PIC and corresponded to a Emiliania huxleyi coccoliths export event that accounted for 85% of the annual PIC export. The foraminifer contribution to the annual PIC flux was much lower (15%) and dominated by Turborotalita quinqueloba and Neogloboquadrina pachyderma. Foraminifer export fluxes were closely related to the surface chlorophyll a concentration, suggesting food availability as an important factor regulating the foraminifer's biomass. We compared size-normalized test weight (SNW) of the foraminifers with previously published SNW from the Crozet Islands using the same methodology and found no significant difference in SNW between sites for a given species. However, the SNW was significantly species-specific with a threefold increase from T. quinqueloba to Globigerina bulloides. The annual PIC:POC molar ratio of 0.07 was close to the mean ratio for the global ocean and lead to a low carbonate counter pump effect (~5%) compared to a previous study north of the PF (6–32%). We suggest that lowers counter pump effect south of the PF despite similar productivity levels is due to a dominance of coccoliths in the PIC fluxes and a difference in the foraminifers species assemblage with a predominance of polar species with lower SNW. |
author2 |
Laboratoire d'Océanographie Microbienne (LOMIC) Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institució Catalana de Recerca i Estudis Avançats (ICREA) ICREA and ICTA Universitat Autònoma de Barcelona (UAB) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) |
format |
Article in Journal/Newspaper |
author |
Rembauville, M. Meilland, J. Ziveri, P. Schiebel, R. Blain, S. Salter, I. |
author_facet |
Rembauville, M. Meilland, J. Ziveri, P. Schiebel, R. Blain, S. Salter, I. |
author_sort |
Rembauville, M. |
title |
Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
title_short |
Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
title_full |
Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
title_fullStr |
Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
title_full_unstemmed |
Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau |
title_sort |
planktic foraminifer and coccolith contribution to carbonate export fluxes over the central kerguelen plateau |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.sorbonne-universite.fr/hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671/document https://hal.sorbonne-universite.fr/hal-01291671/file/Rembauville_2016_Planktic.pdf https://doi.org/10.1016/j.dsr.2016.02.017 |
geographic |
Antarctic The Antarctic Kerguelen |
geographic_facet |
Antarctic The Antarctic Kerguelen |
genre |
Antarc* Antarctic Crozet Islands Neogloboquadrina pachyderma |
genre_facet |
Antarc* Antarctic Crozet Islands Neogloboquadrina pachyderma |
op_source |
ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.sorbonne-universite.fr/hal-01291671 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2016, 111, pp. 91-101. ⟨10.1016/j.dsr.2016.02.017⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2016.02.017 hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671/document https://hal.sorbonne-universite.fr/hal-01291671/file/Rembauville_2016_Planktic.pdf doi:10.1016/j.dsr.2016.02.017 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2016.02.017 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
111 |
container_start_page |
91 |
op_container_end_page |
101 |
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1766267038604460032 |
spelling |
ftccsdartic:oai:HAL:hal-01291671v1 2023-05-15T13:58:42+02:00 Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau Rembauville, M. Meilland, J. Ziveri, P. Schiebel, R. Blain, S. Salter, I. Laboratoire d'Océanographie Microbienne (LOMIC) Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institució Catalana de Recerca i Estudis Avançats (ICREA) ICREA and ICTA Universitat Autònoma de Barcelona (UAB) Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 2016-05 https://hal.sorbonne-universite.fr/hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671/document https://hal.sorbonne-universite.fr/hal-01291671/file/Rembauville_2016_Planktic.pdf https://doi.org/10.1016/j.dsr.2016.02.017 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2016.02.017 hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671 https://hal.sorbonne-universite.fr/hal-01291671/document https://hal.sorbonne-universite.fr/hal-01291671/file/Rembauville_2016_Planktic.pdf doi:10.1016/j.dsr.2016.02.017 info:eu-repo/semantics/OpenAccess ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.sorbonne-universite.fr/hal-01291671 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2016, 111, pp. 91-101. ⟨10.1016/j.dsr.2016.02.017⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1016/j.dsr.2016.02.017 2021-11-21T02:51:56Z International audience We report the contribution of planktic foraminifers and coccoliths to the particulate inorganic carbon (PIC) export fluxes collected over an annual cycle (October 2011/September 2012) on the central Kerguelen Plateau in the Antarctic Zone (AAZ) south of the Polar Front (PF). The seasonality of PIC flux was decoupled from surface chlorophyll a concentration and particulate organic carbon (POC) fluxes and was characterized by a late summer (February) maximum. This peak was concomitant with the highest satellite-derived sea surface PIC and corresponded to a Emiliania huxleyi coccoliths export event that accounted for 85% of the annual PIC export. The foraminifer contribution to the annual PIC flux was much lower (15%) and dominated by Turborotalita quinqueloba and Neogloboquadrina pachyderma. Foraminifer export fluxes were closely related to the surface chlorophyll a concentration, suggesting food availability as an important factor regulating the foraminifer's biomass. We compared size-normalized test weight (SNW) of the foraminifers with previously published SNW from the Crozet Islands using the same methodology and found no significant difference in SNW between sites for a given species. However, the SNW was significantly species-specific with a threefold increase from T. quinqueloba to Globigerina bulloides. The annual PIC:POC molar ratio of 0.07 was close to the mean ratio for the global ocean and lead to a low carbonate counter pump effect (~5%) compared to a previous study north of the PF (6–32%). We suggest that lowers counter pump effect south of the PF despite similar productivity levels is due to a dominance of coccoliths in the PIC fluxes and a difference in the foraminifers species assemblage with a predominance of polar species with lower SNW. Article in Journal/Newspaper Antarc* Antarctic Crozet Islands Neogloboquadrina pachyderma Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Kerguelen Deep Sea Research Part I: Oceanographic Research Papers 111 91 101 |