Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina

Autores
Nicastro, Adam; Surge, Donna; Briz Godino, Ivan; Alvarez, Myrian Rosa; Bas López, Maria
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Nacella deaurata (Gmelin, 1791) and N. magellanica (Gmelin, 1791) are common intertidal species of patelloid limpets found in the Magellanic biogeographic province of Tierra del Fuego, Argentina. These species are also prominent constituents of Holocene archaeological shell middens in the area and are therefore potentially valuable as paleoclimate archives of coastal sea surface temperature (SST). An earlier calibration study examined oxygen isotope (δ18O) time series of one individual from each species (Colonese et al., 2012). A range of estimated SST from shell δ18O values was based on maximum, minimum, and average δ18O-water values. They compared estimated SST with the range of measured SST at the collection site. Here, we present a refined calibration of both Nacella species. Five modern N. deaurata and N. magellanica specimens were collected alive on a nearly monthly basis from October 2015 to October 2016 in the Beagle Channel (54°52′49.62″S 67°16′26.49″W). Two archaeological shell middens containing both species occur at this location dating to the Vandal Minimum. Water temperature and δ18O data were also measured for each collection date to calculate expected δ18O-shell values. We sampled the last increment of growth along the growing edge of the posterior margin of 32 individuals for isotopic analysis. Shell-edge δ18O values have a predictable offset from expected values of +1.28±0.38? for N. deaurata, and +1.32±0.32? (VPDB) for N. magellanica, similar to other patelloid limpet species. Once corrected for this predictable offset, estimated SST agreed well with measured values. Our next step will sequentially micromill specimens harvested in October 2016 and compare estimated monthly SST to observed measurements. Our refined calibration of Nacella limpets will allow seasonal-scale SST reconstruction using archaeological specimens. Such high-resolution archives will provide much needed seasonality data at high southerly latitudes, as well as insights into human-climate interactions.
Fil: Nicastro, Adam. University Of North Carolina At Chapel Hill; Estados Unidos
Fil: Surge, Donna. University of North Carolina; Estados Unidos
Fil: Briz Godino, Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Alvarez, Myrian Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Bas López, Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
AGU Fall Meeting 2018
Washington
Estados Unidos
American Geophysical Union
Materia
ISOTOPE RATIOS
SHELL MIDDEN
PALAEOCLIMATE
HUNTER-FISHER-GATHERERS
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:11336/218066
Acceder
id CONICETDig_408c0ce6bd1016665f9e85659dcadbd3
oai_identifier_str oai:ri.conicet.gov.ar:11336/218066
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, ArgentinaNicastro, AdamSurge, DonnaBriz Godino, IvanAlvarez, Myrian RosaBas López, MariaISOTOPE RATIOSSHELL MIDDENPALAEOCLIMATEHUNTER-FISHER-GATHERERShttps://purl.org/becyt/ford/6.1https://purl.org/becyt/ford/6https://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Nacella deaurata (Gmelin, 1791) and N. magellanica (Gmelin, 1791) are common intertidal species of patelloid limpets found in the Magellanic biogeographic province of Tierra del Fuego, Argentina. These species are also prominent constituents of Holocene archaeological shell middens in the area and are therefore potentially valuable as paleoclimate archives of coastal sea surface temperature (SST). An earlier calibration study examined oxygen isotope (δ18O) time series of one individual from each species (Colonese et al., 2012). A range of estimated SST from shell δ18O values was based on maximum, minimum, and average δ18O-water values. They compared estimated SST with the range of measured SST at the collection site. Here, we present a refined calibration of both Nacella species. Five modern N. deaurata and N. magellanica specimens were collected alive on a nearly monthly basis from October 2015 to October 2016 in the Beagle Channel (54°52′49.62″S 67°16′26.49″W). Two archaeological shell middens containing both species occur at this location dating to the Vandal Minimum. Water temperature and δ18O data were also measured for each collection date to calculate expected δ18O-shell values. We sampled the last increment of growth along the growing edge of the posterior margin of 32 individuals for isotopic analysis. Shell-edge δ18O values have a predictable offset from expected values of +1.28±0.38? for N. deaurata, and +1.32±0.32? (VPDB) for N. magellanica, similar to other patelloid limpet species. Once corrected for this predictable offset, estimated SST agreed well with measured values. Our next step will sequentially micromill specimens harvested in October 2016 and compare estimated monthly SST to observed measurements. Our refined calibration of Nacella limpets will allow seasonal-scale SST reconstruction using archaeological specimens. Such high-resolution archives will provide much needed seasonality data at high southerly latitudes, as well as insights into human-climate interactions.Fil: Nicastro, Adam. University Of North Carolina At Chapel Hill; Estados UnidosFil: Surge, Donna. University of North Carolina; Estados UnidosFil: Briz Godino, Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Alvarez, Myrian Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Bas López, Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaAGU Fall Meeting 2018WashingtonEstados UnidosAmerican Geophysical UnionHarvard-Smithsonian Center for Astrophisics2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/218066Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina; AGU Fall Meeting 2018; Washington; Estados Unidos; 2018; 1-2CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agu.confex.com/agu/fm18/meetingapp.cgi/Paper/435107Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:57:41Zoai:ri.conicet.gov.ar:11336/218066instacron: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 09:57:42.049CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
title Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
spellingShingle Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
Nicastro, Adam
ISOTOPE RATIOS
SHELL MIDDEN
PALAEOCLIMATE
HUNTER-FISHER-GATHERERS
title_short Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
title_full Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
title_fullStr Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
title_full_unstemmed Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
title_sort Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina
dc.creator.none.fl_str_mv Nicastro, Adam
Surge, Donna
Briz Godino, Ivan
Alvarez, Myrian Rosa
Bas López, Maria
author Nicastro, Adam
author_facet Nicastro, Adam
Surge, Donna
Briz Godino, Ivan
Alvarez, Myrian Rosa
Bas López, Maria
author_role author
author2 Surge, Donna
Briz Godino, Ivan
Alvarez, Myrian Rosa
Bas López, Maria
author2_role author
author
author
author
dc.subject.none.fl_str_mv ISOTOPE RATIOS
SHELL MIDDEN
PALAEOCLIMATE
HUNTER-FISHER-GATHERERS
topic ISOTOPE RATIOS
SHELL MIDDEN
PALAEOCLIMATE
HUNTER-FISHER-GATHERERS
purl_subject.fl_str_mv https://purl.org/becyt/ford/6.1
https://purl.org/becyt/ford/6
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Nacella deaurata (Gmelin, 1791) and N. magellanica (Gmelin, 1791) are common intertidal species of patelloid limpets found in the Magellanic biogeographic province of Tierra del Fuego, Argentina. These species are also prominent constituents of Holocene archaeological shell middens in the area and are therefore potentially valuable as paleoclimate archives of coastal sea surface temperature (SST). An earlier calibration study examined oxygen isotope (δ18O) time series of one individual from each species (Colonese et al., 2012). A range of estimated SST from shell δ18O values was based on maximum, minimum, and average δ18O-water values. They compared estimated SST with the range of measured SST at the collection site. Here, we present a refined calibration of both Nacella species. Five modern N. deaurata and N. magellanica specimens were collected alive on a nearly monthly basis from October 2015 to October 2016 in the Beagle Channel (54°52′49.62″S 67°16′26.49″W). Two archaeological shell middens containing both species occur at this location dating to the Vandal Minimum. Water temperature and δ18O data were also measured for each collection date to calculate expected δ18O-shell values. We sampled the last increment of growth along the growing edge of the posterior margin of 32 individuals for isotopic analysis. Shell-edge δ18O values have a predictable offset from expected values of +1.28±0.38? for N. deaurata, and +1.32±0.32? (VPDB) for N. magellanica, similar to other patelloid limpet species. Once corrected for this predictable offset, estimated SST agreed well with measured values. Our next step will sequentially micromill specimens harvested in October 2016 and compare estimated monthly SST to observed measurements. Our refined calibration of Nacella limpets will allow seasonal-scale SST reconstruction using archaeological specimens. Such high-resolution archives will provide much needed seasonality data at high southerly latitudes, as well as insights into human-climate interactions.
Fil: Nicastro, Adam. University Of North Carolina At Chapel Hill; Estados Unidos
Fil: Surge, Donna. University of North Carolina; Estados Unidos
Fil: Briz Godino, Ivan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Alvarez, Myrian Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Bas López, Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
AGU Fall Meeting 2018
Washington
Estados Unidos
American Geophysical Union
description Nacella deaurata (Gmelin, 1791) and N. magellanica (Gmelin, 1791) are common intertidal species of patelloid limpets found in the Magellanic biogeographic province of Tierra del Fuego, Argentina. These species are also prominent constituents of Holocene archaeological shell middens in the area and are therefore potentially valuable as paleoclimate archives of coastal sea surface temperature (SST). An earlier calibration study examined oxygen isotope (δ18O) time series of one individual from each species (Colonese et al., 2012). A range of estimated SST from shell δ18O values was based on maximum, minimum, and average δ18O-water values. They compared estimated SST with the range of measured SST at the collection site. Here, we present a refined calibration of both Nacella species. Five modern N. deaurata and N. magellanica specimens were collected alive on a nearly monthly basis from October 2015 to October 2016 in the Beagle Channel (54°52′49.62″S 67°16′26.49″W). Two archaeological shell middens containing both species occur at this location dating to the Vandal Minimum. Water temperature and δ18O data were also measured for each collection date to calculate expected δ18O-shell values. We sampled the last increment of growth along the growing edge of the posterior margin of 32 individuals for isotopic analysis. Shell-edge δ18O values have a predictable offset from expected values of +1.28±0.38? for N. deaurata, and +1.32±0.32? (VPDB) for N. magellanica, similar to other patelloid limpet species. Once corrected for this predictable offset, estimated SST agreed well with measured values. Our next step will sequentially micromill specimens harvested in October 2016 and compare estimated monthly SST to observed measurements. Our refined calibration of Nacella limpets will allow seasonal-scale SST reconstruction using archaeological specimens. Such high-resolution archives will provide much needed seasonality data at high southerly latitudes, as well as insights into human-climate interactions.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/218066
Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina; AGU Fall Meeting 2018; Washington; Estados Unidos; 2018; 1-2
CONICET Digital
CONICET
url http://hdl.handle.net/11336/218066
identifier_str_mv Refining the Calibration of Oxygen Isotope Ratios in Nacella Limpet Shells, Tierra del Fuego, Argentina; AGU Fall Meeting 2018; Washington; Estados Unidos; 2018; 1-2
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://agu.confex.com/agu/fm18/meetingapp.cgi/Paper/435107
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
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Harvard-Smithsonian Center for Astrophisics
publisher.none.fl_str_mv Harvard-Smithsonian Center for Astrophisics
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_ 1842269477586075648
score 13.13397

Publicaciones similares