Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses

Autores
Musotto, Lorena Laura; Borromei, Ana Maria; Bianchinotti, Maria Virginia; Coronato, Andrea Maria Josefa; Menounos, Brian; Osborn, Gerald; Marr, Robert
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyzed a peat-bog sequence from the central region of Tierra del Fuego, southernmost Patagonia, to reconstruct the environmental changes over the past 15,000 years. Postglacial vegetation was mainly composed by grasslands and shrubby communities with sparsely distributed Nothofagus trees under dry conditions. The predominance of Glomus sp. and Gelasinospora sp. may also indicate less humid conditions related to the steppe communities. The presence of herbivorous grazers is suggested by the record of ascospores of coprophilous Sordaria-type and Sporormiella-type throughout the profile. Between 11,200 and 6500 cal yr BP, the Nothofagus woodland established under warmer and wetter climate than before. However, precipitation must have remained below present-day levels. Most fungal remains (Gaeumannomyces sp., Glomus sp., Gelasinospora sp., Microthyriaceae, Spegazzinia tessarthra, Alternaria sp.) are likely associated with the development of forest-steppe ecotone communities. Following 6500 cal yr BP, when climate conditions were more humid and colder than before, the closed-canopy forest dominated the landscape, and Microthyriaceae remains prevailed among fungi. During the last 1000 years, the record showed open forest communities accompanied by the presence of Glomus sp. These palaeoenvironmental changes observed along the sequence suggested variations in the amount of precipitation of westerly origin related to shifts in the position and/or strength of the southern margin of the westerlies. This study revealed that fungal remains complement pollen/spores analysis by providing important independent information on the palaeoenvironmental and palaeoclimate conditions that prevailed during the late Pleistocene-Holocene in the Lago Fagnano area.
Fil: Musotto, Lorena Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Borromei, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Menounos, Brian. University of Northern British Columbia; Canadá
Fil: Osborn, Gerald. University of Calgary; Canadá
Fil: Marr, Robert. University of Calgary; Canadá
Materia
Palynology
Fungal Records
Postglacial
Tierra del Fuego
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63335
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/63335
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analysesMusotto, Lorena LauraBorromei, Ana MariaBianchinotti, Maria VirginiaCoronato, Andrea Maria JosefaMenounos, BrianOsborn, GeraldMarr, RobertPalynologyFungal RecordsPostglacialTierra del Fuegohttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1We analyzed a peat-bog sequence from the central region of Tierra del Fuego, southernmost Patagonia, to reconstruct the environmental changes over the past 15,000 years. Postglacial vegetation was mainly composed by grasslands and shrubby communities with sparsely distributed Nothofagus trees under dry conditions. The predominance of Glomus sp. and Gelasinospora sp. may also indicate less humid conditions related to the steppe communities. The presence of herbivorous grazers is suggested by the record of ascospores of coprophilous Sordaria-type and Sporormiella-type throughout the profile. Between 11,200 and 6500 cal yr BP, the Nothofagus woodland established under warmer and wetter climate than before. However, precipitation must have remained below present-day levels. Most fungal remains (Gaeumannomyces sp., Glomus sp., Gelasinospora sp., Microthyriaceae, Spegazzinia tessarthra, Alternaria sp.) are likely associated with the development of forest-steppe ecotone communities. Following 6500 cal yr BP, when climate conditions were more humid and colder than before, the closed-canopy forest dominated the landscape, and Microthyriaceae remains prevailed among fungi. During the last 1000 years, the record showed open forest communities accompanied by the presence of Glomus sp. These palaeoenvironmental changes observed along the sequence suggested variations in the amount of precipitation of westerly origin related to shifts in the position and/or strength of the southern margin of the westerlies. This study revealed that fungal remains complement pollen/spores analysis by providing important independent information on the palaeoenvironmental and palaeoclimate conditions that prevailed during the late Pleistocene-Holocene in the Lago Fagnano area.Fil: Musotto, Lorena Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaFil: Borromei, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; ArgentinaFil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; ArgentinaFil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Menounos, Brian. University of Northern British Columbia; CanadáFil: Osborn, Gerald. University of Calgary; CanadáFil: Marr, Robert. University of Calgary; CanadáElsevier Science2017-03info: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/11336/63335Musotto, Lorena Laura; Borromei, Ana Maria; Bianchinotti, Maria Virginia; Coronato, Andrea Maria Josefa; Menounos, Brian; et al.; Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses; Elsevier Science; Review of Palaeobotany and Palynology; 238; 3-2017; 43-540034-6667CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0034666716302317info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2016.11.016info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:26:22Zoai:ri.conicet.gov.ar:11336/63335instacron: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:34982025-10-15 14:26:22.764CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
title Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
spellingShingle Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
Musotto, Lorena Laura
Palynology
Fungal Records
Postglacial
Tierra del Fuego
title_short Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
title_full Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
title_fullStr Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
title_full_unstemmed Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
title_sort Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses
dc.creator.none.fl_str_mv Musotto, Lorena Laura
Borromei, Ana Maria
Bianchinotti, Maria Virginia
Coronato, Andrea Maria Josefa
Menounos, Brian
Osborn, Gerald
Marr, Robert
author Musotto, Lorena Laura
author_facet Musotto, Lorena Laura
Borromei, Ana Maria
Bianchinotti, Maria Virginia
Coronato, Andrea Maria Josefa
Menounos, Brian
Osborn, Gerald
Marr, Robert
author_role author
author2 Borromei, Ana Maria
Bianchinotti, Maria Virginia
Coronato, Andrea Maria Josefa
Menounos, Brian
Osborn, Gerald
Marr, Robert
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Palynology
Fungal Records
Postglacial
Tierra del Fuego
topic Palynology
Fungal Records
Postglacial
Tierra del Fuego
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We analyzed a peat-bog sequence from the central region of Tierra del Fuego, southernmost Patagonia, to reconstruct the environmental changes over the past 15,000 years. Postglacial vegetation was mainly composed by grasslands and shrubby communities with sparsely distributed Nothofagus trees under dry conditions. The predominance of Glomus sp. and Gelasinospora sp. may also indicate less humid conditions related to the steppe communities. The presence of herbivorous grazers is suggested by the record of ascospores of coprophilous Sordaria-type and Sporormiella-type throughout the profile. Between 11,200 and 6500 cal yr BP, the Nothofagus woodland established under warmer and wetter climate than before. However, precipitation must have remained below present-day levels. Most fungal remains (Gaeumannomyces sp., Glomus sp., Gelasinospora sp., Microthyriaceae, Spegazzinia tessarthra, Alternaria sp.) are likely associated with the development of forest-steppe ecotone communities. Following 6500 cal yr BP, when climate conditions were more humid and colder than before, the closed-canopy forest dominated the landscape, and Microthyriaceae remains prevailed among fungi. During the last 1000 years, the record showed open forest communities accompanied by the presence of Glomus sp. These palaeoenvironmental changes observed along the sequence suggested variations in the amount of precipitation of westerly origin related to shifts in the position and/or strength of the southern margin of the westerlies. This study revealed that fungal remains complement pollen/spores analysis by providing important independent information on the palaeoenvironmental and palaeoclimate conditions that prevailed during the late Pleistocene-Holocene in the Lago Fagnano area.
Fil: Musotto, Lorena Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Borromei, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
Fil: Bianchinotti, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiárida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiárida; Argentina
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Menounos, Brian. University of Northern British Columbia; Canadá
Fil: Osborn, Gerald. University of Calgary; Canadá
Fil: Marr, Robert. University of Calgary; Canadá
description We analyzed a peat-bog sequence from the central region of Tierra del Fuego, southernmost Patagonia, to reconstruct the environmental changes over the past 15,000 years. Postglacial vegetation was mainly composed by grasslands and shrubby communities with sparsely distributed Nothofagus trees under dry conditions. The predominance of Glomus sp. and Gelasinospora sp. may also indicate less humid conditions related to the steppe communities. The presence of herbivorous grazers is suggested by the record of ascospores of coprophilous Sordaria-type and Sporormiella-type throughout the profile. Between 11,200 and 6500 cal yr BP, the Nothofagus woodland established under warmer and wetter climate than before. However, precipitation must have remained below present-day levels. Most fungal remains (Gaeumannomyces sp., Glomus sp., Gelasinospora sp., Microthyriaceae, Spegazzinia tessarthra, Alternaria sp.) are likely associated with the development of forest-steppe ecotone communities. Following 6500 cal yr BP, when climate conditions were more humid and colder than before, the closed-canopy forest dominated the landscape, and Microthyriaceae remains prevailed among fungi. During the last 1000 years, the record showed open forest communities accompanied by the presence of Glomus sp. These palaeoenvironmental changes observed along the sequence suggested variations in the amount of precipitation of westerly origin related to shifts in the position and/or strength of the southern margin of the westerlies. This study revealed that fungal remains complement pollen/spores analysis by providing important independent information on the palaeoenvironmental and palaeoclimate conditions that prevailed during the late Pleistocene-Holocene in the Lago Fagnano area.
publishDate 2017
dc.date.none.fl_str_mv 2017-03
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/11336/63335
Musotto, Lorena Laura; Borromei, Ana Maria; Bianchinotti, Maria Virginia; Coronato, Andrea Maria Josefa; Menounos, Brian; et al.; Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses; Elsevier Science; Review of Palaeobotany and Palynology; 238; 3-2017; 43-54
0034-6667
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63335
identifier_str_mv Musotto, Lorena Laura; Borromei, Ana Maria; Bianchinotti, Maria Virginia; Coronato, Andrea Maria Josefa; Menounos, Brian; et al.; Postglacial environments in the southern coast of Lago Fagnano, central Tierra del Fuego, Argentina, based on pollen and fungal microfossils analyses; Elsevier Science; Review of Palaeobotany and Palynology; 238; 3-2017; 43-54
0034-6667
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/S0034666716302317
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2016.11.016
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
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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score 13.22299

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