High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom

Autores
Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela; Kaplan, Michael R.; Borunda, Alejandra L.; Farrell, Kayla R.; Moreno, Patricio; Gaiero, Diego Marcelo; Recasens, Cristina; Sambrotto, Raymond N.; Bostick, Benjamin C.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Little is known about the bioavailability of iron (Fe) in natural dusts and the impact of dust mineralogy on Fe utilization by photosynthetic organisms. Variation in the supply of bioavailable Fe to the ocean has the potential to influence the global carbon cycle by modulating primary production in the Southern Ocean. Much of the dust deposited across the Southern Ocean is sourced from South America, particularly Patagonia, where the waxing and waning of past and present glaciers generate fresh glaciogenic material that contrasts with aged and chemically weathered nonglaciogenic sediments. We show that these two potential sources of modern-day dust are mineralogically distinct, where glaciogenic dust sources contain mostly Fe(II)-rich primary silicate minerals, and nearby nonglaciogenic dust sources contain mostly Fe(III)-rich oxyhydroxide and Fe(III) silicate weathering products. In laboratory culture experiments, Phaeodactylum tricornutum, a well-studied coastal model diatom, grows more rapidly, and with higher photosynthetic efficiency, with input of glaciogenic particulates compared to that of nonglaciogenic particulates due to these differences in Fe mineralogy. Monod nutrient accessibility models fit to our data suggest that particulate Fe(II) content, rather than abiotic solubility, controls the Fe bioavailability in our Fe fertilization experiments. Thus, it is possible for this diatom to access particulate Fe in dusts by another mechanism besides uptake of unchelated Fe (Fe′) dissolved from particles into the bulk solution. If this capability is widespread in the Southern Ocean, then dusts deposited to the Southern Ocean in cold glacial periods are likely more bioavailable than those deposited in warm interglacial periods.
Fil: Shoenfelt, Elizabeth M.. Columbia University; Estados Unidos
Fil: Sun, Jing. Columbia University; Estados Unidos
Fil: Winckler, Gisela. Columbia University; Estados Unidos
Fil: Kaplan, Michael R.. Columbia University; Estados Unidos
Fil: Borunda, Alejandra L.. Columbia University; Estados Unidos
Fil: Farrell, Kayla R.. Columbia University; Estados Unidos
Fil: Moreno, Patricio. Universidad de Chile; Chile
Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Recasens, Cristina. Columbia University; Estados Unidos
Fil: Sambrotto, Raymond N.. Columbia University; Estados Unidos
Fil: Bostick, Benjamin C.. Columbia University; Estados Unidos
Materia
DUST
SOUTH AMERICA
IRON
GLACIAL
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/45886
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/45886
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatomShoenfelt, Elizabeth M.Sun, JingWinckler, GiselaKaplan, Michael R.Borunda, Alejandra L.Farrell, Kayla R.Moreno, PatricioGaiero, Diego MarceloRecasens, CristinaSambrotto, Raymond N.Bostick, Benjamin C.DUSTSOUTH AMERICAIRONGLACIALhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Little is known about the bioavailability of iron (Fe) in natural dusts and the impact of dust mineralogy on Fe utilization by photosynthetic organisms. Variation in the supply of bioavailable Fe to the ocean has the potential to influence the global carbon cycle by modulating primary production in the Southern Ocean. Much of the dust deposited across the Southern Ocean is sourced from South America, particularly Patagonia, where the waxing and waning of past and present glaciers generate fresh glaciogenic material that contrasts with aged and chemically weathered nonglaciogenic sediments. We show that these two potential sources of modern-day dust are mineralogically distinct, where glaciogenic dust sources contain mostly Fe(II)-rich primary silicate minerals, and nearby nonglaciogenic dust sources contain mostly Fe(III)-rich oxyhydroxide and Fe(III) silicate weathering products. In laboratory culture experiments, Phaeodactylum tricornutum, a well-studied coastal model diatom, grows more rapidly, and with higher photosynthetic efficiency, with input of glaciogenic particulates compared to that of nonglaciogenic particulates due to these differences in Fe mineralogy. Monod nutrient accessibility models fit to our data suggest that particulate Fe(II) content, rather than abiotic solubility, controls the Fe bioavailability in our Fe fertilization experiments. Thus, it is possible for this diatom to access particulate Fe in dusts by another mechanism besides uptake of unchelated Fe (Fe′) dissolved from particles into the bulk solution. If this capability is widespread in the Southern Ocean, then dusts deposited to the Southern Ocean in cold glacial periods are likely more bioavailable than those deposited in warm interglacial periods.Fil: Shoenfelt, Elizabeth M.. Columbia University; Estados UnidosFil: Sun, Jing. Columbia University; Estados UnidosFil: Winckler, Gisela. Columbia University; Estados UnidosFil: Kaplan, Michael R.. Columbia University; Estados UnidosFil: Borunda, Alejandra L.. Columbia University; Estados UnidosFil: Farrell, Kayla R.. Columbia University; Estados UnidosFil: Moreno, Patricio. Universidad de Chile; ChileFil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Recasens, Cristina. Columbia University; Estados UnidosFil: Sambrotto, Raymond N.. Columbia University; Estados UnidosFil: Bostick, Benjamin C.. Columbia University; Estados UnidosAmerican Association for the Advancement of Science2017-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/45886Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela; Kaplan, Michael R.; Borunda, Alejandra L.; et al.; High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom; American Association for the Advancement of Science; Science Advances; 3; 6; 6-20172375-25480036-8075CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://advances.sciencemag.org/content/3/6/e1700314info:eu-repo/semantics/altIdentifier/doi/10.1126/sciadv.1700314info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:55:07Zoai:ri.conicet.gov.ar:11336/45886instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:55:08.157CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
title High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
spellingShingle High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
Shoenfelt, Elizabeth M.
DUST
SOUTH AMERICA
IRON
GLACIAL
title_short High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
title_full High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
title_fullStr High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
title_full_unstemmed High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
title_sort High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom
dc.creator.none.fl_str_mv Shoenfelt, Elizabeth M.
Sun, Jing
Winckler, Gisela
Kaplan, Michael R.
Borunda, Alejandra L.
Farrell, Kayla R.
Moreno, Patricio
Gaiero, Diego Marcelo
Recasens, Cristina
Sambrotto, Raymond N.
Bostick, Benjamin C.
author Shoenfelt, Elizabeth M.
author_facet Shoenfelt, Elizabeth M.
Sun, Jing
Winckler, Gisela
Kaplan, Michael R.
Borunda, Alejandra L.
Farrell, Kayla R.
Moreno, Patricio
Gaiero, Diego Marcelo
Recasens, Cristina
Sambrotto, Raymond N.
Bostick, Benjamin C.
author_role author
author2 Sun, Jing
Winckler, Gisela
Kaplan, Michael R.
Borunda, Alejandra L.
Farrell, Kayla R.
Moreno, Patricio
Gaiero, Diego Marcelo
Recasens, Cristina
Sambrotto, Raymond N.
Bostick, Benjamin C.
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv DUST
SOUTH AMERICA
IRON
GLACIAL
topic DUST
SOUTH AMERICA
IRON
GLACIAL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Little is known about the bioavailability of iron (Fe) in natural dusts and the impact of dust mineralogy on Fe utilization by photosynthetic organisms. Variation in the supply of bioavailable Fe to the ocean has the potential to influence the global carbon cycle by modulating primary production in the Southern Ocean. Much of the dust deposited across the Southern Ocean is sourced from South America, particularly Patagonia, where the waxing and waning of past and present glaciers generate fresh glaciogenic material that contrasts with aged and chemically weathered nonglaciogenic sediments. We show that these two potential sources of modern-day dust are mineralogically distinct, where glaciogenic dust sources contain mostly Fe(II)-rich primary silicate minerals, and nearby nonglaciogenic dust sources contain mostly Fe(III)-rich oxyhydroxide and Fe(III) silicate weathering products. In laboratory culture experiments, Phaeodactylum tricornutum, a well-studied coastal model diatom, grows more rapidly, and with higher photosynthetic efficiency, with input of glaciogenic particulates compared to that of nonglaciogenic particulates due to these differences in Fe mineralogy. Monod nutrient accessibility models fit to our data suggest that particulate Fe(II) content, rather than abiotic solubility, controls the Fe bioavailability in our Fe fertilization experiments. Thus, it is possible for this diatom to access particulate Fe in dusts by another mechanism besides uptake of unchelated Fe (Fe′) dissolved from particles into the bulk solution. If this capability is widespread in the Southern Ocean, then dusts deposited to the Southern Ocean in cold glacial periods are likely more bioavailable than those deposited in warm interglacial periods.
Fil: Shoenfelt, Elizabeth M.. Columbia University; Estados Unidos
Fil: Sun, Jing. Columbia University; Estados Unidos
Fil: Winckler, Gisela. Columbia University; Estados Unidos
Fil: Kaplan, Michael R.. Columbia University; Estados Unidos
Fil: Borunda, Alejandra L.. Columbia University; Estados Unidos
Fil: Farrell, Kayla R.. Columbia University; Estados Unidos
Fil: Moreno, Patricio. Universidad de Chile; Chile
Fil: Gaiero, Diego Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina
Fil: Recasens, Cristina. Columbia University; Estados Unidos
Fil: Sambrotto, Raymond N.. Columbia University; Estados Unidos
Fil: Bostick, Benjamin C.. Columbia University; Estados Unidos
description Little is known about the bioavailability of iron (Fe) in natural dusts and the impact of dust mineralogy on Fe utilization by photosynthetic organisms. Variation in the supply of bioavailable Fe to the ocean has the potential to influence the global carbon cycle by modulating primary production in the Southern Ocean. Much of the dust deposited across the Southern Ocean is sourced from South America, particularly Patagonia, where the waxing and waning of past and present glaciers generate fresh glaciogenic material that contrasts with aged and chemically weathered nonglaciogenic sediments. We show that these two potential sources of modern-day dust are mineralogically distinct, where glaciogenic dust sources contain mostly Fe(II)-rich primary silicate minerals, and nearby nonglaciogenic dust sources contain mostly Fe(III)-rich oxyhydroxide and Fe(III) silicate weathering products. In laboratory culture experiments, Phaeodactylum tricornutum, a well-studied coastal model diatom, grows more rapidly, and with higher photosynthetic efficiency, with input of glaciogenic particulates compared to that of nonglaciogenic particulates due to these differences in Fe mineralogy. Monod nutrient accessibility models fit to our data suggest that particulate Fe(II) content, rather than abiotic solubility, controls the Fe bioavailability in our Fe fertilization experiments. Thus, it is possible for this diatom to access particulate Fe in dusts by another mechanism besides uptake of unchelated Fe (Fe′) dissolved from particles into the bulk solution. If this capability is widespread in the Southern Ocean, then dusts deposited to the Southern Ocean in cold glacial periods are likely more bioavailable than those deposited in warm interglacial periods.
publishDate 2017
dc.date.none.fl_str_mv 2017-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/45886
Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela; Kaplan, Michael R.; Borunda, Alejandra L.; et al.; High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom; American Association for the Advancement of Science; Science Advances; 3; 6; 6-2017
2375-2548
0036-8075
CONICET Digital
CONICET
url http://hdl.handle.net/11336/45886
identifier_str_mv Shoenfelt, Elizabeth M.; Sun, Jing; Winckler, Gisela; Kaplan, Michael R.; Borunda, Alejandra L.; et al.; High particulate iron(II) content in glacially sourced dusts enhances productivity of a model diatom; American Association for the Advancement of Science; Science Advances; 3; 6; 6-2017
2375-2548
0036-8075
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://advances.sciencemag.org/content/3/6/e1700314
info:eu-repo/semantics/altIdentifier/doi/10.1126/sciadv.1700314
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Association for the Advancement of Science
publisher.none.fl_str_mv American Association for the Advancement of Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.144186

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