Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils

Autores
Gordillo, Sandra; Bernasconi, Emiliana; Cusminsky, Gabriela Catalina; Coronato, Andrea Maria Josefa; Rabassa, Jorge Oscar
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Late Quaternary environmental changes, especially sea-level fluctuations and glacial advances and retreats, affected the distribution of the benthic marine fauna which inhabited the Beagle Channel in southernmost South America. To evaluate these changes, calcareous macro-and-microfossils obtained from Holocene marine sediments along a sector of the western side of the Beagle Channel have been used for a multi-proxy approach. In total, 119 species were recovered: 65 mollusks (24 bivalves, 35 gastropods and 6 chitons), 33 foraminifera and 21 ostracods. Other preserved calcareous groups, which appeared in minor proportions, were brachiopods and cirripeds. The calcareous fossil assemblages from the early Holocene represent an ecosystem transition which started with vacant niches first occupied by opportunistic species, and/or eurytopic taxa. These were then replaced by more diverse fauna assemblages, associated with the proliferation of habitats which occurred under truly marine conditions during the Mid Holocene. When Holocene calcareous fauna is compared with its Pleistocene counterparts from the same region, some differences in the proportion of taxonomic groups and taxa composition are noted. These partly follow the heterogeneity of habitats in the Beagle Channel and water masses of different origin which have either greater or less influence throughout the Late Quaternary, but they can also be interpreted in association with environmental changes after the Last Glacial Maximum. In conclusion, the data provide insights into both spatial and temporal changes, and show evidence of a gradual transformation from a brackish to a marine environment caused by the Holocene sea transgression. It also documents Late Quaternary faunistic changes associated with topographic and oceanographic local conditions in this microbasin.
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: Bernasconi, Emiliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Cusminsky, Gabriela Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Coronato, Andrea Maria Josefa. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rabassa, Jorge Oscar. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Materia
Late Quaternary
Mollusks
Paleontology
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
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oai:ri.conicet.gov.ar:11336/32689
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/32689
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossilsGordillo, SandraBernasconi, EmilianaCusminsky, Gabriela CatalinaCoronato, Andrea Maria JosefaRabassa, Jorge OscarLate QuaternaryMollusksPaleontologyTierra del Fuegohttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Late Quaternary environmental changes, especially sea-level fluctuations and glacial advances and retreats, affected the distribution of the benthic marine fauna which inhabited the Beagle Channel in southernmost South America. To evaluate these changes, calcareous macro-and-microfossils obtained from Holocene marine sediments along a sector of the western side of the Beagle Channel have been used for a multi-proxy approach. In total, 119 species were recovered: 65 mollusks (24 bivalves, 35 gastropods and 6 chitons), 33 foraminifera and 21 ostracods. Other preserved calcareous groups, which appeared in minor proportions, were brachiopods and cirripeds. The calcareous fossil assemblages from the early Holocene represent an ecosystem transition which started with vacant niches first occupied by opportunistic species, and/or eurytopic taxa. These were then replaced by more diverse fauna assemblages, associated with the proliferation of habitats which occurred under truly marine conditions during the Mid Holocene. When Holocene calcareous fauna is compared with its Pleistocene counterparts from the same region, some differences in the proportion of taxonomic groups and taxa composition are noted. These partly follow the heterogeneity of habitats in the Beagle Channel and water masses of different origin which have either greater or less influence throughout the Late Quaternary, but they can also be interpreted in association with environmental changes after the Last Glacial Maximum. In conclusion, the data provide insights into both spatial and temporal changes, and show evidence of a gradual transformation from a brackish to a marine environment caused by the Holocene sea transgression. It also documents Late Quaternary faunistic changes associated with topographic and oceanographic local conditions in this microbasin.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; ArgentinaFil: Bernasconi, Emiliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Cusminsky, Gabriela Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Coronato, Andrea Maria Josefa. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Rabassa, Jorge Oscar. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaElsevier2012-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32689Rabassa, Jorge Oscar; Coronato, Andrea Maria Josefa; Cusminsky, Gabriela Catalina; Bernasconi, Emiliana; Gordillo, Sandra; Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils; Elsevier; Quaternary International; 305; 11-2012; 149-1621040-6182enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2012.11.016info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1040618212033277info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:03:21Zoai:ri.conicet.gov.ar:11336/32689instacron: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 10:03:22.502CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
title Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
spellingShingle Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
Gordillo, Sandra
Late Quaternary
Mollusks
Paleontology
Tierra del Fuego
title_short Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
title_full Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
title_fullStr Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
title_full_unstemmed Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
title_sort Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils
dc.creator.none.fl_str_mv Gordillo, Sandra
Bernasconi, Emiliana
Cusminsky, Gabriela Catalina
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author Gordillo, Sandra
author_facet Gordillo, Sandra
Bernasconi, Emiliana
Cusminsky, Gabriela Catalina
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author_role author
author2 Bernasconi, Emiliana
Cusminsky, Gabriela Catalina
Coronato, Andrea Maria Josefa
Rabassa, Jorge Oscar
author2_role author
author
author
author
dc.subject.none.fl_str_mv Late Quaternary
Mollusks
Paleontology
Tierra del Fuego
topic Late Quaternary
Mollusks
Paleontology
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 Late Quaternary environmental changes, especially sea-level fluctuations and glacial advances and retreats, affected the distribution of the benthic marine fauna which inhabited the Beagle Channel in southernmost South America. To evaluate these changes, calcareous macro-and-microfossils obtained from Holocene marine sediments along a sector of the western side of the Beagle Channel have been used for a multi-proxy approach. In total, 119 species were recovered: 65 mollusks (24 bivalves, 35 gastropods and 6 chitons), 33 foraminifera and 21 ostracods. Other preserved calcareous groups, which appeared in minor proportions, were brachiopods and cirripeds. The calcareous fossil assemblages from the early Holocene represent an ecosystem transition which started with vacant niches first occupied by opportunistic species, and/or eurytopic taxa. These were then replaced by more diverse fauna assemblages, associated with the proliferation of habitats which occurred under truly marine conditions during the Mid Holocene. When Holocene calcareous fauna is compared with its Pleistocene counterparts from the same region, some differences in the proportion of taxonomic groups and taxa composition are noted. These partly follow the heterogeneity of habitats in the Beagle Channel and water masses of different origin which have either greater or less influence throughout the Late Quaternary, but they can also be interpreted in association with environmental changes after the Last Glacial Maximum. In conclusion, the data provide insights into both spatial and temporal changes, and show evidence of a gradual transformation from a brackish to a marine environment caused by the Holocene sea transgression. It also documents Late Quaternary faunistic changes associated with topographic and oceanographic local conditions in this microbasin.
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: Bernasconi, Emiliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Cusminsky, Gabriela Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina
Fil: Coronato, Andrea Maria Josefa. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Rabassa, Jorge Oscar. Universidad Nacional de la Patagonia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
description Late Quaternary environmental changes, especially sea-level fluctuations and glacial advances and retreats, affected the distribution of the benthic marine fauna which inhabited the Beagle Channel in southernmost South America. To evaluate these changes, calcareous macro-and-microfossils obtained from Holocene marine sediments along a sector of the western side of the Beagle Channel have been used for a multi-proxy approach. In total, 119 species were recovered: 65 mollusks (24 bivalves, 35 gastropods and 6 chitons), 33 foraminifera and 21 ostracods. Other preserved calcareous groups, which appeared in minor proportions, were brachiopods and cirripeds. The calcareous fossil assemblages from the early Holocene represent an ecosystem transition which started with vacant niches first occupied by opportunistic species, and/or eurytopic taxa. These were then replaced by more diverse fauna assemblages, associated with the proliferation of habitats which occurred under truly marine conditions during the Mid Holocene. When Holocene calcareous fauna is compared with its Pleistocene counterparts from the same region, some differences in the proportion of taxonomic groups and taxa composition are noted. These partly follow the heterogeneity of habitats in the Beagle Channel and water masses of different origin which have either greater or less influence throughout the Late Quaternary, but they can also be interpreted in association with environmental changes after the Last Glacial Maximum. In conclusion, the data provide insights into both spatial and temporal changes, and show evidence of a gradual transformation from a brackish to a marine environment caused by the Holocene sea transgression. It also documents Late Quaternary faunistic changes associated with topographic and oceanographic local conditions in this microbasin.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/32689
Rabassa, Jorge Oscar; Coronato, Andrea Maria Josefa; Cusminsky, Gabriela Catalina; Bernasconi, Emiliana; Gordillo, Sandra; Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils; Elsevier; Quaternary International; 305; 11-2012; 149-162
1040-6182
url http://hdl.handle.net/11336/32689
identifier_str_mv Rabassa, Jorge Oscar; Coronato, Andrea Maria Josefa; Cusminsky, Gabriela Catalina; Bernasconi, Emiliana; Gordillo, Sandra; Late Quaternary environmental changes in southernmost South America reflected in marine calcareous macro-and-microfossils; Elsevier; Quaternary International; 305; 11-2012; 149-162
1040-6182
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2012.11.016
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1040618212033277
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
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 13.13397

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