Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study
A number of trace metals play essential roles in marine ecosystem structure and biological productivity. Until recently, it has been argued that phytoplankton access primarily dissolved iron, while particulate iron was considered a refractory material with little use biologically and limited interac...
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Online Access: | https://doi.org/10.1016/j.chemgeo.2018.10.003 https://archimer.ifremer.fr/doc/00460/57197/59166.pdf https://archimer.ifremer.fr/doc/00460/57197/ |
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fttriple:oai:gotriple.eu:10670/1.wcg522 2023-05-15T18:25:51+02:00 Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study Cheize, Marie Planquette, H.f. Fitzsimmons, J.n. Pelleter, Ewan Sherrell, R.m. Lambert, Christophe Bucciarelli, E. Sarthou, G. Le Goff, Marion Liorzou, Celine Chéron, Sandrine Viollier, E. Gayet, Nicolas https://doi.org/10.1016/j.chemgeo.2018.10.003 https://archimer.ifremer.fr/doc/00460/57197/59166.pdf https://archimer.ifremer.fr/doc/00460/57197/ en eng Elsevier BV doi:10.1016/j.chemgeo.2018.10.003 10670/1.wcg522 https://archimer.ifremer.fr/doc/00460/57197/59166.pdf https://archimer.ifremer.fr/doc/00460/57197/ other Archimer, archive institutionnelle de l'Ifremer Chemical Geology (0009-2541) (Elsevier BV), 2019-04 , Vol. 511 , P. 389-415 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.chemgeo.2018.10.003 2023-01-22T18:52:13Z A number of trace metals play essential roles in marine ecosystem structure and biological productivity. Until recently, it has been argued that phytoplankton access primarily dissolved iron, while particulate iron was considered a refractory material with little use biologically and limited interaction with the dissolved pool. In order to assess the transfer mechanisms between sediment-sourced particulate trace metals and the dissolved pool, we conducted a 14-month incubation that reacted resuspended sediments with natural seawater, both originating from the Kerguelen area (KEOPS cruises; Southern Ocean), in the dark, and at concentrations replicating natural conditions. Three types of sediments were investigated (named BioSi, BioSi + Ca, and Basalt), mostly composed of (i) biogenic silica (bSiO2), (ii) bSiO2 and calcite, and (iii) basaltic fragments, respectively. The release of dissolved silicon (dSi), iron (dFe) and manganese (dMn) was monitored regularly throughout the incubation, as well as living bacteria density and Fe organic ligands. Depending on the origin and composition of the sediment, unique dFe and dMn fluxes were observed, including a strong decoupling between dFe and dMn. The basaltic sediment released up to 1.09 ± 0.04 nmol L−1 of dFe and 0.28 ± 0.09 nmol L−1 of dMn, while the biogenic sediments released a higher 3.91 ± 0.04 nmol L−1 and 8.03 ± 0.42 nmol L−1 of dFe and dMn, respectively. Several factors influencing the release and removal of dFe and dMn were discernable at the temporal sampling resolution of the incubation, including the structural composition of the sediment, bacterial abundance, and the formation of manganese oxides. The regular sampling over short timescales and the extended sampling over one year proved to be critical to constrain the processes and exchanges that govern the contribution of the particulate to the dissolved pools. Overall, this incubation provides a strong basis for reassessing the role of resuspended sedimentary particles in the marine biogeochemical cycles ... Text Southern Ocean Unknown Southern Ocean Kerguelen Chemical Geology 511 389 415 |
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English |
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envir geo |
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envir geo Cheize, Marie Planquette, H.f. Fitzsimmons, J.n. Pelleter, Ewan Sherrell, R.m. Lambert, Christophe Bucciarelli, E. Sarthou, G. Le Goff, Marion Liorzou, Celine Chéron, Sandrine Viollier, E. Gayet, Nicolas Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
topic_facet |
envir geo |
description |
A number of trace metals play essential roles in marine ecosystem structure and biological productivity. Until recently, it has been argued that phytoplankton access primarily dissolved iron, while particulate iron was considered a refractory material with little use biologically and limited interaction with the dissolved pool. In order to assess the transfer mechanisms between sediment-sourced particulate trace metals and the dissolved pool, we conducted a 14-month incubation that reacted resuspended sediments with natural seawater, both originating from the Kerguelen area (KEOPS cruises; Southern Ocean), in the dark, and at concentrations replicating natural conditions. Three types of sediments were investigated (named BioSi, BioSi + Ca, and Basalt), mostly composed of (i) biogenic silica (bSiO2), (ii) bSiO2 and calcite, and (iii) basaltic fragments, respectively. The release of dissolved silicon (dSi), iron (dFe) and manganese (dMn) was monitored regularly throughout the incubation, as well as living bacteria density and Fe organic ligands. Depending on the origin and composition of the sediment, unique dFe and dMn fluxes were observed, including a strong decoupling between dFe and dMn. The basaltic sediment released up to 1.09 ± 0.04 nmol L−1 of dFe and 0.28 ± 0.09 nmol L−1 of dMn, while the biogenic sediments released a higher 3.91 ± 0.04 nmol L−1 and 8.03 ± 0.42 nmol L−1 of dFe and dMn, respectively. Several factors influencing the release and removal of dFe and dMn were discernable at the temporal sampling resolution of the incubation, including the structural composition of the sediment, bacterial abundance, and the formation of manganese oxides. The regular sampling over short timescales and the extended sampling over one year proved to be critical to constrain the processes and exchanges that govern the contribution of the particulate to the dissolved pools. Overall, this incubation provides a strong basis for reassessing the role of resuspended sedimentary particles in the marine biogeochemical cycles ... |
format |
Text |
author |
Cheize, Marie Planquette, H.f. Fitzsimmons, J.n. Pelleter, Ewan Sherrell, R.m. Lambert, Christophe Bucciarelli, E. Sarthou, G. Le Goff, Marion Liorzou, Celine Chéron, Sandrine Viollier, E. Gayet, Nicolas |
author_facet |
Cheize, Marie Planquette, H.f. Fitzsimmons, J.n. Pelleter, Ewan Sherrell, R.m. Lambert, Christophe Bucciarelli, E. Sarthou, G. Le Goff, Marion Liorzou, Celine Chéron, Sandrine Viollier, E. Gayet, Nicolas |
author_sort |
Cheize, Marie |
title |
Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
title_short |
Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
title_full |
Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
title_fullStr |
Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
title_full_unstemmed |
Contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: An experimental study |
title_sort |
contribution of resuspended sedimentary particles to dissolved iron and manganese in the ocean: an experimental study |
publisher |
Elsevier BV |
url |
https://doi.org/10.1016/j.chemgeo.2018.10.003 https://archimer.ifremer.fr/doc/00460/57197/59166.pdf https://archimer.ifremer.fr/doc/00460/57197/ |
geographic |
Southern Ocean Kerguelen |
geographic_facet |
Southern Ocean Kerguelen |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer Chemical Geology (0009-2541) (Elsevier BV), 2019-04 , Vol. 511 , P. 389-415 |
op_relation |
doi:10.1016/j.chemgeo.2018.10.003 10670/1.wcg522 https://archimer.ifremer.fr/doc/00460/57197/59166.pdf https://archimer.ifremer.fr/doc/00460/57197/ |
op_rights |
other |
op_doi |
https://doi.org/10.1016/j.chemgeo.2018.10.003 |
container_title |
Chemical Geology |
container_volume |
511 |
container_start_page |
389 |
op_container_end_page |
415 |
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1766207542310993920 |