Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature
- Autores
- Lara, Ruben Jose; Alder, Viviana Andrea; Franzosi, Claudio Atilio; Kattner, Gerhard
- Año de publicación
- 2010
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Surface particulate organic matter (POM) along a transect from Subantarctic coastal waters on the Argentine shelf to the Bellingshausen Sea was characterized by its organic carbon (POC) and nitrogen (PON) content and δ13C and δ15N signatures in relation to sea surface water temperature (SST), nutrients and plankton. The correlation of δ13C with SST was highly significant for the entire transect but less obvious within Subantarctic shelf ecosystems. Stable isotopes of POM varied from δ13C ~ - 12‰ and δ15N ~ 8‰ in Subantarctic shallow waters to δ13C ~ - 32‰ and δ15N ~ - 2‰ in the sector including the oceanic Subantarctic waters and the Antarctic region. In Argentine shelf waters δ13C was > - 24‰ (on average - 20.9‰) and more variable than in oceanic Subantarctic and Antarctic waters (average of - 27.6‰). High isotopic variability of POM in northern Argentine shelf waters is probably due to a pronounced nutrient gradient. There, a sharp δ13C decrease of ca. 12‰ was associated to an increase of the silicate to nitrate (Si:N) ratio to values > 0.25, and an increase of siliceous phytoplankton. Further south, Si:N ratios > 1 did not significantly affect δ13C, and the influence of the sea surface temperature (SST) was more evident. δ15N in POM of Argentine shelf waters averaged 6.3 ± 2.4‰, and the lowest δ15N values (- 1.7‰) occurred in the northern Drake Passage, where they build, together with δ13C around - 27‰, a clearly distinct pattern in the western South Atlantic. For the whole transect, SST alone accounted for 74% of the δ13C variability. A multiple regression including SST, ammonium and POC explained 83% of δ13C variance. The fit improvement by ammonium involved the nutrient-poor, regenerative system in the northernmost shallow sector and the Subantarctic shelf. δ15N showed a strong inverse relationship with the fraction of unutilized nitrate, probably due to isotopic enrichment in the nitrate pool by phytoplankton uptake.
Fil: Lara, Ruben Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centre For Tropical Marine Ecology; Alemania
Fil: Alder, Viviana Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
Fil: Franzosi, Claudio Atilio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina
Fil: Kattner, Gerhard. Alfred-wegener-institut Helmholtz-zentrum Für Polar- Und Meeresforschung; Alemania - Materia
-
Nutrients
Plankton
Seston
Southwestern Atlantic
Stable Isotopes
Temperature - 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:11336/53527
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oai:ri.conicet.gov.ar:11336/53527 |
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spelling |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signatureLara, Ruben JoseAlder, Viviana AndreaFranzosi, Claudio AtilioKattner, GerhardNutrientsPlanktonSestonSouthwestern AtlanticStable IsotopesTemperaturehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Surface particulate organic matter (POM) along a transect from Subantarctic coastal waters on the Argentine shelf to the Bellingshausen Sea was characterized by its organic carbon (POC) and nitrogen (PON) content and δ13C and δ15N signatures in relation to sea surface water temperature (SST), nutrients and plankton. The correlation of δ13C with SST was highly significant for the entire transect but less obvious within Subantarctic shelf ecosystems. Stable isotopes of POM varied from δ13C ~ - 12‰ and δ15N ~ 8‰ in Subantarctic shallow waters to δ13C ~ - 32‰ and δ15N ~ - 2‰ in the sector including the oceanic Subantarctic waters and the Antarctic region. In Argentine shelf waters δ13C was > - 24‰ (on average - 20.9‰) and more variable than in oceanic Subantarctic and Antarctic waters (average of - 27.6‰). High isotopic variability of POM in northern Argentine shelf waters is probably due to a pronounced nutrient gradient. There, a sharp δ13C decrease of ca. 12‰ was associated to an increase of the silicate to nitrate (Si:N) ratio to values > 0.25, and an increase of siliceous phytoplankton. Further south, Si:N ratios > 1 did not significantly affect δ13C, and the influence of the sea surface temperature (SST) was more evident. δ15N in POM of Argentine shelf waters averaged 6.3 ± 2.4‰, and the lowest δ15N values (- 1.7‰) occurred in the northern Drake Passage, where they build, together with δ13C around - 27‰, a clearly distinct pattern in the western South Atlantic. For the whole transect, SST alone accounted for 74% of the δ13C variability. A multiple regression including SST, ammonium and POC explained 83% of δ13C variance. The fit improvement by ammonium involved the nutrient-poor, regenerative system in the northernmost shallow sector and the Subantarctic shelf. δ15N showed a strong inverse relationship with the fraction of unutilized nitrate, probably due to isotopic enrichment in the nitrate pool by phytoplankton uptake.Fil: Lara, Ruben Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centre For Tropical Marine Ecology; AlemaniaFil: Alder, Viviana Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Franzosi, Claudio Atilio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; ArgentinaFil: Kattner, Gerhard. Alfred-wegener-institut Helmholtz-zentrum Für Polar- Und Meeresforschung; AlemaniaElsevier Science2010-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/53527Lara, Ruben Jose; Alder, Viviana Andrea; Franzosi, Claudio Atilio; Kattner, Gerhard; Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature; Elsevier Science; Journal Of Marine Systems; 79; 1-2; 1-2010; 199-2090924-7963CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0924796309002759info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2009.09.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:51:38Zoai:ri.conicet.gov.ar:11336/53527instacron: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 09:51:38.335CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
title |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
spellingShingle |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature Lara, Ruben Jose Nutrients Plankton Seston Southwestern Atlantic Stable Isotopes Temperature |
title_short |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
title_full |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
title_fullStr |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
title_full_unstemmed |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
title_sort |
Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature |
dc.creator.none.fl_str_mv |
Lara, Ruben Jose Alder, Viviana Andrea Franzosi, Claudio Atilio Kattner, Gerhard |
author |
Lara, Ruben Jose |
author_facet |
Lara, Ruben Jose Alder, Viviana Andrea Franzosi, Claudio Atilio Kattner, Gerhard |
author_role |
author |
author2 |
Alder, Viviana Andrea Franzosi, Claudio Atilio Kattner, Gerhard |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Nutrients Plankton Seston Southwestern Atlantic Stable Isotopes Temperature |
topic |
Nutrients Plankton Seston Southwestern Atlantic Stable Isotopes Temperature |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Surface particulate organic matter (POM) along a transect from Subantarctic coastal waters on the Argentine shelf to the Bellingshausen Sea was characterized by its organic carbon (POC) and nitrogen (PON) content and δ13C and δ15N signatures in relation to sea surface water temperature (SST), nutrients and plankton. The correlation of δ13C with SST was highly significant for the entire transect but less obvious within Subantarctic shelf ecosystems. Stable isotopes of POM varied from δ13C ~ - 12‰ and δ15N ~ 8‰ in Subantarctic shallow waters to δ13C ~ - 32‰ and δ15N ~ - 2‰ in the sector including the oceanic Subantarctic waters and the Antarctic region. In Argentine shelf waters δ13C was > - 24‰ (on average - 20.9‰) and more variable than in oceanic Subantarctic and Antarctic waters (average of - 27.6‰). High isotopic variability of POM in northern Argentine shelf waters is probably due to a pronounced nutrient gradient. There, a sharp δ13C decrease of ca. 12‰ was associated to an increase of the silicate to nitrate (Si:N) ratio to values > 0.25, and an increase of siliceous phytoplankton. Further south, Si:N ratios > 1 did not significantly affect δ13C, and the influence of the sea surface temperature (SST) was more evident. δ15N in POM of Argentine shelf waters averaged 6.3 ± 2.4‰, and the lowest δ15N values (- 1.7‰) occurred in the northern Drake Passage, where they build, together with δ13C around - 27‰, a clearly distinct pattern in the western South Atlantic. For the whole transect, SST alone accounted for 74% of the δ13C variability. A multiple regression including SST, ammonium and POC explained 83% of δ13C variance. The fit improvement by ammonium involved the nutrient-poor, regenerative system in the northernmost shallow sector and the Subantarctic shelf. δ15N showed a strong inverse relationship with the fraction of unutilized nitrate, probably due to isotopic enrichment in the nitrate pool by phytoplankton uptake. Fil: Lara, Ruben Jose. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Centre For Tropical Marine Ecology; Alemania Fil: Alder, Viviana Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina Fil: Franzosi, Claudio Atilio. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ecología, Genética y Evolución; Argentina Fil: Kattner, Gerhard. Alfred-wegener-institut Helmholtz-zentrum Für Polar- Und Meeresforschung; Alemania |
description |
Surface particulate organic matter (POM) along a transect from Subantarctic coastal waters on the Argentine shelf to the Bellingshausen Sea was characterized by its organic carbon (POC) and nitrogen (PON) content and δ13C and δ15N signatures in relation to sea surface water temperature (SST), nutrients and plankton. The correlation of δ13C with SST was highly significant for the entire transect but less obvious within Subantarctic shelf ecosystems. Stable isotopes of POM varied from δ13C ~ - 12‰ and δ15N ~ 8‰ in Subantarctic shallow waters to δ13C ~ - 32‰ and δ15N ~ - 2‰ in the sector including the oceanic Subantarctic waters and the Antarctic region. In Argentine shelf waters δ13C was > - 24‰ (on average - 20.9‰) and more variable than in oceanic Subantarctic and Antarctic waters (average of - 27.6‰). High isotopic variability of POM in northern Argentine shelf waters is probably due to a pronounced nutrient gradient. There, a sharp δ13C decrease of ca. 12‰ was associated to an increase of the silicate to nitrate (Si:N) ratio to values > 0.25, and an increase of siliceous phytoplankton. Further south, Si:N ratios > 1 did not significantly affect δ13C, and the influence of the sea surface temperature (SST) was more evident. δ15N in POM of Argentine shelf waters averaged 6.3 ± 2.4‰, and the lowest δ15N values (- 1.7‰) occurred in the northern Drake Passage, where they build, together with δ13C around - 27‰, a clearly distinct pattern in the western South Atlantic. For the whole transect, SST alone accounted for 74% of the δ13C variability. A multiple regression including SST, ammonium and POC explained 83% of δ13C variance. The fit improvement by ammonium involved the nutrient-poor, regenerative system in the northernmost shallow sector and the Subantarctic shelf. δ15N showed a strong inverse relationship with the fraction of unutilized nitrate, probably due to isotopic enrichment in the nitrate pool by phytoplankton uptake. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01 |
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/11336/53527 Lara, Ruben Jose; Alder, Viviana Andrea; Franzosi, Claudio Atilio; Kattner, Gerhard; Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature; Elsevier Science; Journal Of Marine Systems; 79; 1-2; 1-2010; 199-209 0924-7963 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/53527 |
identifier_str_mv |
Lara, Ruben Jose; Alder, Viviana Andrea; Franzosi, Claudio Atilio; Kattner, Gerhard; Characteristics of suspended particulate organic matter in the southwestern Atlantic: Influence of temperature, nutrient and phytoplankton features on the stable isotope signature; Elsevier Science; Journal Of Marine Systems; 79; 1-2; 1-2010; 199-209 0924-7963 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0924796309002759 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2009.09.002 |
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 |
Elsevier Science |
publisher.none.fl_str_mv |
Elsevier 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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1844613586785140736 |
score |
13.070432 |