Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina

Autores
Benvenuto, María Laura; Fernández Honanine, Mariana; Osterriegh, M.; Coronato, Andrea Maria Josefa; Rabassa, Jorge Oscar
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Phytolith analyses are practically absent from peatlands, except for studies developed on tropical mires and peat profiles. In Tierra del Fuego, Argentina, peatlands represent the largest surface coverage in the South American continent. Because of their continuous sedimentation pattern, they represent relevant palaeoenvironmental records from which the econstruction of the latest Pleistocene-Holocene history of this region can be obtained. The aim of the study was to analyze the presence of phytoliths in selected mires and fossil peat layers from Tierra del Fuego, Argentina, and to compare these records with present vegetation. Phytoliths from the most abundant and representative plant species, a minerotrophic mire and an alluvial sequence with fossil peat layers were analyzed and described. Nine of the ten plant families analyzed produced phytoliths. The morphotypes described coincided with previous studies carried on species from other regions. Phytolith assemblages from top soil of both sites mostly coincided with the phytolith assemblages of the plants developed over them, except for tabular and cone sedge phytoliths, which were hardly found in soil samples. A lower silicification level and/or fragmentation processes could account for this absence. Profile analyses showed a low diversity of phytolith morphologies, either due to low plant diversity, a poor phytolith production of the species or to dissolution/fragmentation processes. Besides this low diversity, the phytolith assemblages described reflect the presence of grass communities during the development of these environments, being the Pooideae subfamily the dominant component of these communities. This study is the first to present results of phytolith analyses from cold-temperate, subantarctic peatlands, showing the importance of this proxy as a complement of others, such as pollen or charcoal particles in the palaeoenvironmental interpretation of the region.
Fil: Benvenuto, María Laura. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Fernández Honanine, Mariana. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Osterriegh, M.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rabassa, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
Silicopytholits
Peatlands
Tierra del Fuego
Holocene
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:11336/2488
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, ArgentinaBenvenuto, María LauraFernández Honanine, MarianaOsterriegh, M.Coronato, Andrea Maria JosefaRabassa, Jorge OscarSilicopytholitsPeatlandsTierra del FuegoHolocenehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Phytolith analyses are practically absent from peatlands, except for studies developed on tropical mires and peat profiles. In Tierra del Fuego, Argentina, peatlands represent the largest surface coverage in the South American continent. Because of their continuous sedimentation pattern, they represent relevant palaeoenvironmental records from which the econstruction of the latest Pleistocene-Holocene history of this region can be obtained. The aim of the study was to analyze the presence of phytoliths in selected mires and fossil peat layers from Tierra del Fuego, Argentina, and to compare these records with present vegetation. Phytoliths from the most abundant and representative plant species, a minerotrophic mire and an alluvial sequence with fossil peat layers were analyzed and described. Nine of the ten plant families analyzed produced phytoliths. The morphotypes described coincided with previous studies carried on species from other regions. Phytolith assemblages from top soil of both sites mostly coincided with the phytolith assemblages of the plants developed over them, except for tabular and cone sedge phytoliths, which were hardly found in soil samples. A lower silicification level and/or fragmentation processes could account for this absence. Profile analyses showed a low diversity of phytolith morphologies, either due to low plant diversity, a poor phytolith production of the species or to dissolution/fragmentation processes. Besides this low diversity, the phytolith assemblages described reflect the presence of grass communities during the development of these environments, being the Pooideae subfamily the dominant component of these communities. This study is the first to present results of phytolith analyses from cold-temperate, subantarctic peatlands, showing the importance of this proxy as a complement of others, such as pollen or charcoal particles in the palaeoenvironmental interpretation of the region.Fil: Benvenuto, María Laura. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; ArgentinaFil: Fernández Honanine, Mariana. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; ArgentinaFil: Osterriegh, M.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; ArgentinaFil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Rabassa, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaPergamon-elsevier Science Ltd2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2488Benvenuto, María Laura; Fernández Honanine, Mariana; Osterriegh, M.; Coronato, Andrea Maria Josefa; Rabassa, Jorge Oscar; Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina; Pergamon-elsevier Science Ltd; Quaternary International; 287; 1-2013; 20-331040-6182enginfo:eu-repo/semantics/reference/url/info:eu-repo/semantics/reference es info:eu-repo/semantics/reference/doi/10.1016/j.quaint.2011.11.025info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2011.11.025info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1040618211006653info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:29:31Zoai:ri.conicet.gov.ar:11336/2488instacron: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:34982025-10-22 11:29:31.585CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
title Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
spellingShingle Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
Benvenuto, María Laura
Silicopytholits
Peatlands
Tierra del Fuego
Holocene
title_short Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
title_full Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
title_fullStr Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
title_full_unstemmed Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
title_sort Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina
dc.creator.none.fl_str_mv Benvenuto, María Laura
Fernández Honanine, Mariana
Osterriegh, M.
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author Benvenuto, María Laura
author_facet Benvenuto, María Laura
Fernández Honanine, Mariana
Osterriegh, M.
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author_role author
author2 Fernández Honanine, Mariana
Osterriegh, M.
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author2_role author
author
author
author
dc.subject.none.fl_str_mv Silicopytholits
Peatlands
Tierra del Fuego
Holocene
topic Silicopytholits
Peatlands
Tierra del Fuego
Holocene
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Phytolith analyses are practically absent from peatlands, except for studies developed on tropical mires and peat profiles. In Tierra del Fuego, Argentina, peatlands represent the largest surface coverage in the South American continent. Because of their continuous sedimentation pattern, they represent relevant palaeoenvironmental records from which the econstruction of the latest Pleistocene-Holocene history of this region can be obtained. The aim of the study was to analyze the presence of phytoliths in selected mires and fossil peat layers from Tierra del Fuego, Argentina, and to compare these records with present vegetation. Phytoliths from the most abundant and representative plant species, a minerotrophic mire and an alluvial sequence with fossil peat layers were analyzed and described. Nine of the ten plant families analyzed produced phytoliths. The morphotypes described coincided with previous studies carried on species from other regions. Phytolith assemblages from top soil of both sites mostly coincided with the phytolith assemblages of the plants developed over them, except for tabular and cone sedge phytoliths, which were hardly found in soil samples. A lower silicification level and/or fragmentation processes could account for this absence. Profile analyses showed a low diversity of phytolith morphologies, either due to low plant diversity, a poor phytolith production of the species or to dissolution/fragmentation processes. Besides this low diversity, the phytolith assemblages described reflect the presence of grass communities during the development of these environments, being the Pooideae subfamily the dominant component of these communities. This study is the first to present results of phytolith analyses from cold-temperate, subantarctic peatlands, showing the importance of this proxy as a complement of others, such as pollen or charcoal particles in the palaeoenvironmental interpretation of the region.
Fil: Benvenuto, María Laura. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Fernández Honanine, Mariana. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Osterriegh, M.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Geología de Costas y del Cuaternario; Argentina
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rabassa, Jorge Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description Phytolith analyses are practically absent from peatlands, except for studies developed on tropical mires and peat profiles. In Tierra del Fuego, Argentina, peatlands represent the largest surface coverage in the South American continent. Because of their continuous sedimentation pattern, they represent relevant palaeoenvironmental records from which the econstruction of the latest Pleistocene-Holocene history of this region can be obtained. The aim of the study was to analyze the presence of phytoliths in selected mires and fossil peat layers from Tierra del Fuego, Argentina, and to compare these records with present vegetation. Phytoliths from the most abundant and representative plant species, a minerotrophic mire and an alluvial sequence with fossil peat layers were analyzed and described. Nine of the ten plant families analyzed produced phytoliths. The morphotypes described coincided with previous studies carried on species from other regions. Phytolith assemblages from top soil of both sites mostly coincided with the phytolith assemblages of the plants developed over them, except for tabular and cone sedge phytoliths, which were hardly found in soil samples. A lower silicification level and/or fragmentation processes could account for this absence. Profile analyses showed a low diversity of phytolith morphologies, either due to low plant diversity, a poor phytolith production of the species or to dissolution/fragmentation processes. Besides this low diversity, the phytolith assemblages described reflect the presence of grass communities during the development of these environments, being the Pooideae subfamily the dominant component of these communities. This study is the first to present results of phytolith analyses from cold-temperate, subantarctic peatlands, showing the importance of this proxy as a complement of others, such as pollen or charcoal particles in the palaeoenvironmental interpretation of the region.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
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/11336/2488
Benvenuto, María Laura; Fernández Honanine, Mariana; Osterriegh, M.; Coronato, Andrea Maria Josefa; Rabassa, Jorge Oscar; Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina; Pergamon-elsevier Science Ltd; Quaternary International; 287; 1-2013; 20-33
1040-6182
url http://hdl.handle.net/11336/2488
identifier_str_mv Benvenuto, María Laura; Fernández Honanine, Mariana; Osterriegh, M.; Coronato, Andrea Maria Josefa; Rabassa, Jorge Oscar; Silica biomineralizations in Holocene peatlands and fossil peat layers from Tierra del Fuego, Argentina; Pergamon-elsevier Science Ltd; Quaternary International; 287; 1-2013; 20-33
1040-6182
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/reference/url/info:eu-repo/semantics/reference es info:eu-repo/semantics/reference/doi/10.1016/j.quaint.2011.11.025
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2011.11.025
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1040618211006653
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 Pergamon-elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-elsevier Science Ltd
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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