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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/45886
Ver los metadatos del registro completo
id |
CONICETDig_de10a335a6108e40eb7982b15b7f818b |
---|---|
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 Técnicas2025-09-29T10:22:22Zoai: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:34982025-09-29 10:22:22.744CONICET 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 |
_version_ |
1844614215021625344 |
score |
13.070432 |