Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?

Autores
Boretto, Gabriella Margherita; Consoloni, Ilaria; Morán, Ariana Gisela; Regattieri, Eleonora; Gordillo, Sandra; Fucks, Enrique Eduardo; Zanchetta, Giovanni; Dallai, Luigi
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
There are only a few data concerning the Quaternary climate fluctuations in the marine environments of the Atlantic Patagonian coast. In this regard, the aragonitic shell of the Ameghinomya antiqua bivalve offers the possibility to study the climate variability and the seasonal cycles of sea water temperature in the region at different geological times. We compared oxygen isotopic profiles along the shell-growth axis on four well-preserved A. antiqua bivalves collected from marine coastal deposits of Marine Isotope Stage (MIS) 7, MIS 5, Holocene (7.284 ±140 yr cal BP), and from the present-day active beach of Bahia Bustamante (Patagonia Argentina). Shell ontogeny was determined through the annual growth lines recorded along the external region of the shell, and was also verified by cross-section analyses. The fossil bivalves were around 15 years old, while the Present day shell was 10 years old. When the modern climatic data available are compared, the higher δ18Oshell values represent the cold season, while the lower δ18Oshell values indicate the warm season. The δ18Oshell ranges indicate different environmental conditions and seasonal temperature variations between specimens. By assuming, a constant δ18Ow calculated with the limited environmental data available, superficial seawater temperatures are estimated from the specimens. These paleotemperatures may overestimate water temperatures, and shell formation seems to occur with an offset from expected oxygen isotopic equilibrium with the water in which they lived. Meanwhile, A. antiqua shells are suitable bioarchives for the comparison of seasonal patterns throughout the Quaternary, thus constituting another proxy for the evaluation of paleoclimatic and paleoenvironmental changes in the Patagonia region.
Fil: Boretto, Gabriella Margherita. 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: Consoloni, Ilaria. Università degli Studi di Pisa; Italia
Fil: Morán, Ariana Gisela. 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: Regattieri, Eleonora. Consiglio Nazionale delle Ricerche; Italia
Fil: Gordillo, Sandra. 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: Fucks, Enrique Eduardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Zanchetta, Giovanni. Università degli Studi di Pisa; Italia
Fil: Dallai, Luigi. Istituto di Geoscienze e Georisorse; Italia
Materia
AMEGHINOMYA ANTIQUA
BIVALVE SHELLS
OXYGEN ISOTOPES
PATAGONIA
QUATERNARY
SEASONALITY
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:11336/125659
Acceder
id CONICETDig_87a1d00d88a0cc4076466ecf312d8097
oai_identifier_str oai:ri.conicet.gov.ar:11336/125659
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?Boretto, Gabriella MargheritaConsoloni, IlariaMorán, Ariana GiselaRegattieri, EleonoraGordillo, SandraFucks, Enrique EduardoZanchetta, GiovanniDallai, LuigiAMEGHINOMYA ANTIQUABIVALVE SHELLSOXYGEN ISOTOPESPATAGONIAQUATERNARYSEASONALITYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1There are only a few data concerning the Quaternary climate fluctuations in the marine environments of the Atlantic Patagonian coast. In this regard, the aragonitic shell of the Ameghinomya antiqua bivalve offers the possibility to study the climate variability and the seasonal cycles of sea water temperature in the region at different geological times. We compared oxygen isotopic profiles along the shell-growth axis on four well-preserved A. antiqua bivalves collected from marine coastal deposits of Marine Isotope Stage (MIS) 7, MIS 5, Holocene (7.284 ±140 yr cal BP), and from the present-day active beach of Bahia Bustamante (Patagonia Argentina). Shell ontogeny was determined through the annual growth lines recorded along the external region of the shell, and was also verified by cross-section analyses. The fossil bivalves were around 15 years old, while the Present day shell was 10 years old. When the modern climatic data available are compared, the higher δ18Oshell values represent the cold season, while the lower δ18Oshell values indicate the warm season. The δ18Oshell ranges indicate different environmental conditions and seasonal temperature variations between specimens. By assuming, a constant δ18Ow calculated with the limited environmental data available, superficial seawater temperatures are estimated from the specimens. These paleotemperatures may overestimate water temperatures, and shell formation seems to occur with an offset from expected oxygen isotopic equilibrium with the water in which they lived. Meanwhile, A. antiqua shells are suitable bioarchives for the comparison of seasonal patterns throughout the Quaternary, thus constituting another proxy for the evaluation of paleoclimatic and paleoenvironmental changes in the Patagonia region.Fil: Boretto, Gabriella Margherita. 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: Consoloni, Ilaria. Università degli Studi di Pisa; ItaliaFil: Morán, Ariana Gisela. 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: Regattieri, Eleonora. Consiglio Nazionale delle Ricerche; ItaliaFil: Gordillo, Sandra. 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: Fucks, Enrique Eduardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Zanchetta, Giovanni. Università degli Studi di Pisa; ItaliaFil: Dallai, Luigi. Istituto di Geoscienze e Georisorse; ItaliaAssociazione Italiana per lo Studio del Quaternario2019-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/125659Boretto, Gabriella Margherita; Consoloni, Ilaria; Morán, Ariana Gisela; Regattieri, Eleonora; Gordillo, Sandra; et al.; Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?; Associazione Italiana per lo Studio del Quaternario; Alpine and Mediterranean Quaternary; 32; 1; 7-2019; 57-722279-73272279-7335CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.26382/AMQ.2019.06info:eu-repo/semantics/altIdentifier/url/http://amq.aiqua.it/index.php/issues-2012-2017/amq-32-1-proof-copy/1040-oxygen-stable-isotope-analyses-on-ameghinomya-antiqua-shells-a-promising-tool-for-palaeoenvironmental-reconstruction-along-the-quaternary-patagonian-argentina-coast/file%20%3Einfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:57:26Zoai:ri.conicet.gov.ar:11336/125659instacron: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:34982025-09-03 09:57:27.174CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
title Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
spellingShingle Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
Boretto, Gabriella Margherita
AMEGHINOMYA ANTIQUA
BIVALVE SHELLS
OXYGEN ISOTOPES
PATAGONIA
QUATERNARY
SEASONALITY
title_short Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
title_full Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
title_fullStr Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
title_full_unstemmed Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
title_sort Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?
dc.creator.none.fl_str_mv Boretto, Gabriella Margherita
Consoloni, Ilaria
Morán, Ariana Gisela
Regattieri, Eleonora
Gordillo, Sandra
Fucks, Enrique Eduardo
Zanchetta, Giovanni
Dallai, Luigi
author Boretto, Gabriella Margherita
author_facet Boretto, Gabriella Margherita
Consoloni, Ilaria
Morán, Ariana Gisela
Regattieri, Eleonora
Gordillo, Sandra
Fucks, Enrique Eduardo
Zanchetta, Giovanni
Dallai, Luigi
author_role author
author2 Consoloni, Ilaria
Morán, Ariana Gisela
Regattieri, Eleonora
Gordillo, Sandra
Fucks, Enrique Eduardo
Zanchetta, Giovanni
Dallai, Luigi
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv AMEGHINOMYA ANTIQUA
BIVALVE SHELLS
OXYGEN ISOTOPES
PATAGONIA
QUATERNARY
SEASONALITY
topic AMEGHINOMYA ANTIQUA
BIVALVE SHELLS
OXYGEN ISOTOPES
PATAGONIA
QUATERNARY
SEASONALITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv There are only a few data concerning the Quaternary climate fluctuations in the marine environments of the Atlantic Patagonian coast. In this regard, the aragonitic shell of the Ameghinomya antiqua bivalve offers the possibility to study the climate variability and the seasonal cycles of sea water temperature in the region at different geological times. We compared oxygen isotopic profiles along the shell-growth axis on four well-preserved A. antiqua bivalves collected from marine coastal deposits of Marine Isotope Stage (MIS) 7, MIS 5, Holocene (7.284 ±140 yr cal BP), and from the present-day active beach of Bahia Bustamante (Patagonia Argentina). Shell ontogeny was determined through the annual growth lines recorded along the external region of the shell, and was also verified by cross-section analyses. The fossil bivalves were around 15 years old, while the Present day shell was 10 years old. When the modern climatic data available are compared, the higher δ18Oshell values represent the cold season, while the lower δ18Oshell values indicate the warm season. The δ18Oshell ranges indicate different environmental conditions and seasonal temperature variations between specimens. By assuming, a constant δ18Ow calculated with the limited environmental data available, superficial seawater temperatures are estimated from the specimens. These paleotemperatures may overestimate water temperatures, and shell formation seems to occur with an offset from expected oxygen isotopic equilibrium with the water in which they lived. Meanwhile, A. antiqua shells are suitable bioarchives for the comparison of seasonal patterns throughout the Quaternary, thus constituting another proxy for the evaluation of paleoclimatic and paleoenvironmental changes in the Patagonia region.
Fil: Boretto, Gabriella Margherita. 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: Consoloni, Ilaria. Università degli Studi di Pisa; Italia
Fil: Morán, Ariana Gisela. 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: Regattieri, Eleonora. Consiglio Nazionale delle Ricerche; Italia
Fil: Gordillo, Sandra. 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: Fucks, Enrique Eduardo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina
Fil: Zanchetta, Giovanni. Università degli Studi di Pisa; Italia
Fil: Dallai, Luigi. Istituto di Geoscienze e Georisorse; Italia
description There are only a few data concerning the Quaternary climate fluctuations in the marine environments of the Atlantic Patagonian coast. In this regard, the aragonitic shell of the Ameghinomya antiqua bivalve offers the possibility to study the climate variability and the seasonal cycles of sea water temperature in the region at different geological times. We compared oxygen isotopic profiles along the shell-growth axis on four well-preserved A. antiqua bivalves collected from marine coastal deposits of Marine Isotope Stage (MIS) 7, MIS 5, Holocene (7.284 ±140 yr cal BP), and from the present-day active beach of Bahia Bustamante (Patagonia Argentina). Shell ontogeny was determined through the annual growth lines recorded along the external region of the shell, and was also verified by cross-section analyses. The fossil bivalves were around 15 years old, while the Present day shell was 10 years old. When the modern climatic data available are compared, the higher δ18Oshell values represent the cold season, while the lower δ18Oshell values indicate the warm season. The δ18Oshell ranges indicate different environmental conditions and seasonal temperature variations between specimens. By assuming, a constant δ18Ow calculated with the limited environmental data available, superficial seawater temperatures are estimated from the specimens. These paleotemperatures may overestimate water temperatures, and shell formation seems to occur with an offset from expected oxygen isotopic equilibrium with the water in which they lived. Meanwhile, A. antiqua shells are suitable bioarchives for the comparison of seasonal patterns throughout the Quaternary, thus constituting another proxy for the evaluation of paleoclimatic and paleoenvironmental changes in the Patagonia region.
publishDate 2019
dc.date.none.fl_str_mv 2019-07
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/11336/125659
Boretto, Gabriella Margherita; Consoloni, Ilaria; Morán, Ariana Gisela; Regattieri, Eleonora; Gordillo, Sandra; et al.; Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?; Associazione Italiana per lo Studio del Quaternario; Alpine and Mediterranean Quaternary; 32; 1; 7-2019; 57-72
2279-7327
2279-7335
CONICET Digital
CONICET
url http://hdl.handle.net/11336/125659
identifier_str_mv Boretto, Gabriella Margherita; Consoloni, Ilaria; Morán, Ariana Gisela; Regattieri, Eleonora; Gordillo, Sandra; et al.; Oxygen stable isotope analyses on ameghinomya antiqua shells: A promising tool for palaeoenvironmental reconstruction along the quaternary patagonian Argentina coast?; Associazione Italiana per lo Studio del Quaternario; Alpine and Mediterranean Quaternary; 32; 1; 7-2019; 57-72
2279-7327
2279-7335
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.26382/AMQ.2019.06
info:eu-repo/semantics/altIdentifier/url/http://amq.aiqua.it/index.php/issues-2012-2017/amq-32-1-proof-copy/1040-oxygen-stable-isotope-analyses-on-ameghinomya-antiqua-shells-a-promising-tool-for-palaeoenvironmental-reconstruction-along-the-quaternary-patagonian-argentina-coast/file%20%3E
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Associazione Italiana per lo Studio del Quaternario
publisher.none.fl_str_mv Associazione Italiana per lo Studio del Quaternario
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_ 1842269461919301632
score 13.13397

Publicaciones similares