Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina

Autores
Massaferro, Julieta; Laprida, Cecilia; Orpella, German Hugo; Mercau, Ramón J.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Lakes are excellent sensors of environmental change, including climate change. Chironomids (Insecta, Diptera) and ostracods (Crustacea) are among the most useful biological indicators for paleoenvironmental reconstruction found in lake sediments, due to their sensitiveness to environmental variables. However, the use of these microfossils in quaternary studies for southern Patagonia is still limited and poorly understood because of the paucity of regional taxonomic and palaeonvironmental knowledge. The multi-proxy study of lacustrine sediments from Laguna El Chaltel presented here aims to partially fill this gap. Laguna El Chaltel is a permanent lake located at 49"58'25"S, 71"06'53"W in southern Patagonia, Argentina, in the semidesert steppe east of the Andes. A 60.8-cm short sediment core has been analysed in order to obtain information about the paleoenvironmental evolution of the lake during the last ca. 5000 yr BP. The 210Pb237Cs dating gave an age of 4685 cal yr BP for the base of the core. The presence and abundance of littoral chironomids of the genus Polypedilum Kieffer suggest oscillations in the lake level during the timespan of the core, while variations in the relative abundance of the ostracod Limnocythere rionegroensis Cusminsky and Whatley indicate the onset of periods of evaporative concentration. Some geochemical and physical parameters such as TIC (total inorganic carbon), TOC (total organic carbon) and magnetic susceptibility show similar patterns evidencing important variations in lake dynamics.
Fil: Massaferro, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Administración de Parques Nacionales; Argentina
Fil: Laprida, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Orpella, German Hugo. Administración de Parques Nacionales. Parque Nacional "Nahuel Huapi"; Argentina
Fil: Mercau, Ramón J.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología
La Plata
Argentina
Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
Materia
Ostracodos
quironomidos
Holoceno
Patagonia austral
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:11336/280522
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/280522
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, ArgentinaMassaferro, JulietaLaprida, CeciliaOrpella, German HugoMercau, Ramón J.OstracodosquironomidosHolocenoPatagonia australhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Lakes are excellent sensors of environmental change, including climate change. Chironomids (Insecta, Diptera) and ostracods (Crustacea) are among the most useful biological indicators for paleoenvironmental reconstruction found in lake sediments, due to their sensitiveness to environmental variables. However, the use of these microfossils in quaternary studies for southern Patagonia is still limited and poorly understood because of the paucity of regional taxonomic and palaeonvironmental knowledge. The multi-proxy study of lacustrine sediments from Laguna El Chaltel presented here aims to partially fill this gap. Laguna El Chaltel is a permanent lake located at 49"58'25"S, 71"06'53"W in southern Patagonia, Argentina, in the semidesert steppe east of the Andes. A 60.8-cm short sediment core has been analysed in order to obtain information about the paleoenvironmental evolution of the lake during the last ca. 5000 yr BP. The 210Pb237Cs dating gave an age of 4685 cal yr BP for the base of the core. The presence and abundance of littoral chironomids of the genus Polypedilum Kieffer suggest oscillations in the lake level during the timespan of the core, while variations in the relative abundance of the ostracod Limnocythere rionegroensis Cusminsky and Whatley indicate the onset of periods of evaporative concentration. Some geochemical and physical parameters such as TIC (total inorganic carbon), TOC (total organic carbon) and magnetic susceptibility show similar patterns evidencing important variations in lake dynamics.Fil: Massaferro, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Administración de Parques Nacionales; ArgentinaFil: Laprida, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Orpella, German Hugo. Administración de Parques Nacionales. Parque Nacional "Nahuel Huapi"; ArgentinaFil: Mercau, Ramón J.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaX Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de PaleontologíaLa PlataArgentinaUniversidad Nacional de La Plata. Facultad de Ciencias Naturales y MuseoUniversidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo2010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/280522Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina; X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología; La Plata; Argentina; 2010; 1-1978-987-95849-7-2CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://sedici.unlp.edu.ar/handle/10915/16727Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:29:12Zoai:ri.conicet.gov.ar:11336/280522instacron: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:34982026-02-06 12:29:13.202CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
title Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
spellingShingle Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
Massaferro, Julieta
Ostracodos
quironomidos
Holoceno
Patagonia austral
title_short Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
title_full Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
title_fullStr Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
title_full_unstemmed Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
title_sort Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina
dc.creator.none.fl_str_mv Massaferro, Julieta
Laprida, Cecilia
Orpella, German Hugo
Mercau, Ramón J.
author Massaferro, Julieta
author_facet Massaferro, Julieta
Laprida, Cecilia
Orpella, German Hugo
Mercau, Ramón J.
author_role author
author2 Laprida, Cecilia
Orpella, German Hugo
Mercau, Ramón J.
author2_role author
author
author
dc.subject.none.fl_str_mv Ostracodos
quironomidos
Holoceno
Patagonia austral
topic Ostracodos
quironomidos
Holoceno
Patagonia austral
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Lakes are excellent sensors of environmental change, including climate change. Chironomids (Insecta, Diptera) and ostracods (Crustacea) are among the most useful biological indicators for paleoenvironmental reconstruction found in lake sediments, due to their sensitiveness to environmental variables. However, the use of these microfossils in quaternary studies for southern Patagonia is still limited and poorly understood because of the paucity of regional taxonomic and palaeonvironmental knowledge. The multi-proxy study of lacustrine sediments from Laguna El Chaltel presented here aims to partially fill this gap. Laguna El Chaltel is a permanent lake located at 49"58'25"S, 71"06'53"W in southern Patagonia, Argentina, in the semidesert steppe east of the Andes. A 60.8-cm short sediment core has been analysed in order to obtain information about the paleoenvironmental evolution of the lake during the last ca. 5000 yr BP. The 210Pb237Cs dating gave an age of 4685 cal yr BP for the base of the core. The presence and abundance of littoral chironomids of the genus Polypedilum Kieffer suggest oscillations in the lake level during the timespan of the core, while variations in the relative abundance of the ostracod Limnocythere rionegroensis Cusminsky and Whatley indicate the onset of periods of evaporative concentration. Some geochemical and physical parameters such as TIC (total inorganic carbon), TOC (total organic carbon) and magnetic susceptibility show similar patterns evidencing important variations in lake dynamics.
Fil: Massaferro, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Administración de Parques Nacionales; Argentina
Fil: Laprida, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Orpella, German Hugo. Administración de Parques Nacionales. Parque Nacional "Nahuel Huapi"; Argentina
Fil: Mercau, Ramón J.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología
La Plata
Argentina
Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
description Lakes are excellent sensors of environmental change, including climate change. Chironomids (Insecta, Diptera) and ostracods (Crustacea) are among the most useful biological indicators for paleoenvironmental reconstruction found in lake sediments, due to their sensitiveness to environmental variables. However, the use of these microfossils in quaternary studies for southern Patagonia is still limited and poorly understood because of the paucity of regional taxonomic and palaeonvironmental knowledge. The multi-proxy study of lacustrine sediments from Laguna El Chaltel presented here aims to partially fill this gap. Laguna El Chaltel is a permanent lake located at 49"58'25"S, 71"06'53"W in southern Patagonia, Argentina, in the semidesert steppe east of the Andes. A 60.8-cm short sediment core has been analysed in order to obtain information about the paleoenvironmental evolution of the lake during the last ca. 5000 yr BP. The 210Pb237Cs dating gave an age of 4685 cal yr BP for the base of the core. The presence and abundance of littoral chironomids of the genus Polypedilum Kieffer suggest oscillations in the lake level during the timespan of the core, while variations in the relative abundance of the ostracod Limnocythere rionegroensis Cusminsky and Whatley indicate the onset of periods of evaporative concentration. Some geochemical and physical parameters such as TIC (total inorganic carbon), TOC (total organic carbon) and magnetic susceptibility show similar patterns evidencing important variations in lake dynamics.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/11336/280522
Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina; X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología; La Plata; Argentina; 2010; 1-1
978-987-95849-7-2
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280522
identifier_str_mv Fossil chironomids and ostracods from a 5000 years- sediment sequence of Laguna El Chaltel, southern Patagonia, Argentina; X Congreso Argentino de Paleontología y Bioestratigrafía y VII Congreso Latinoamericano de Paleontología; La Plata; Argentina; 2010; 1-1
978-987-95849-7-2
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://sedici.unlp.edu.ar/handle/10915/16727
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
publisher.none.fl_str_mv Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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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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