Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana

The extensive matgrounds in Carboniferous-Permian open-marine deposits of western Argentina constitute an anachronistic facies, because with the onset of penetrative bioturbation during the early Paleozoic microbial mats essentially disappeared from these settings. Abundant microbially induced sedim...

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Autores: Buatois, Luis Alberto, Netto, R. G., Mangano, Maria Gabriela, Carmona, Noelia Beatriz
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/17574
Acceso en línea:http://hdl.handle.net/11336/17574
Access Level:acceso abierto
Palabra clave:Microbial Mats
Gondwana
Paleozoic
Deglaciation
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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spelling Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of GondwanaBuatois, Luis AlbertoNetto, R. G.Mangano, Maria GabrielaCarmona, Noelia BeatrizMicrobial MatsGondwanaPaleozoicDeglaciationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The extensive matgrounds in Carboniferous-Permian open-marine deposits of western Argentina constitute an anachronistic facies, because with the onset of penetrative bioturbation during the early Paleozoic microbial mats essentially disappeared from these settings. Abundant microbially induced sedimentary structures in the Argentinean deposits are coincident with the disappearance of trace and body fossils in the succession and with a landward facies shift indicative of transgressive conditions. Deposits of the Late Carboniferous–Early Permian glacial event are well developed in adjacent basins in eastern Argentina, Brazil, South Africa and Antarctica, but do not occur in the western Andean basins of Argentina. However, the deglaciation phase is indirectly recorded in the studied region by a rapid rise in sea level referred to as the Stephanian-Asselian transgression. We suggest that an unusual release of meltwater during the final deglaciation episode of the Gondwana Ice Age may have dramatically freshened peri-Gondwanan seas, impacting negatively on coastal and shallow-marine benthic faunas. Suppression of bioturbation was therefore conducive to a brief re-appearance of matground-dominated ecosystems, reminiscent of those in the precambrian. Bioturbation is essential for ecosystem performance and plays a major role in ocean and sediment geochemistry. Accordingly, the decimation of the mixed layer during deglaciation in the Gondwana basins may have altered ecosystem functioning and geochemical cycling.Fil: Buatois, Luis Alberto. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Netto, R. G.. Universidade do Vale do Rio dos Sinos; BrasilFil: Mangano, Maria Gabriela. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Carmona, Noelia Beatriz. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWiley2013-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17574Buatois, Luis Alberto; Netto, R. G.; Mangano, Maria Gabriela; Carmona, Noelia Beatriz; Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana; Wiley; Geobiology; 11; 4; 7-2013; 307-3171472-4677enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/gbi.12038info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/gbi.12038/abstractinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:17:28Zoai:ri.conicet.gov.ar:11336/17574instacron: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:34982024-05-08 14:17:29.11CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
title Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
spellingShingle Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
Buatois, Luis Alberto
Microbial Mats
Gondwana
Paleozoic
Deglaciation
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
title_full Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
title_fullStr Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
title_full_unstemmed Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
title_sort Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana
dc.creator.none.fl_str_mv Buatois, Luis Alberto
Netto, R. G.
Mangano, Maria Gabriela
Carmona, Noelia Beatriz
author Buatois, Luis Alberto
author_facet Buatois, Luis Alberto
Netto, R. G.
Mangano, Maria Gabriela
Carmona, Noelia Beatriz
author_role author
author2 Netto, R. G.
Mangano, Maria Gabriela
Carmona, Noelia Beatriz
author2_role author
author
author
dc.subject.none.fl_str_mv Microbial Mats
Gondwana
Paleozoic
Deglaciation
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic Microbial Mats
Gondwana
Paleozoic
Deglaciation
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The extensive matgrounds in Carboniferous-Permian open-marine deposits of western Argentina constitute an anachronistic facies, because with the onset of penetrative bioturbation during the early Paleozoic microbial mats essentially disappeared from these settings. Abundant microbially induced sedimentary structures in the Argentinean deposits are coincident with the disappearance of trace and body fossils in the succession and with a landward facies shift indicative of transgressive conditions. Deposits of the Late Carboniferous–Early Permian glacial event are well developed in adjacent basins in eastern Argentina, Brazil, South Africa and Antarctica, but do not occur in the western Andean basins of Argentina. However, the deglaciation phase is indirectly recorded in the studied region by a rapid rise in sea level referred to as the Stephanian-Asselian transgression. We suggest that an unusual release of meltwater during the final deglaciation episode of the Gondwana Ice Age may have dramatically freshened peri-Gondwanan seas, impacting negatively on coastal and shallow-marine benthic faunas. Suppression of bioturbation was therefore conducive to a brief re-appearance of matground-dominated ecosystems, reminiscent of those in the precambrian. Bioturbation is essential for ecosystem performance and plays a major role in ocean and sediment geochemistry. Accordingly, the decimation of the mixed layer during deglaciation in the Gondwana basins may have altered ecosystem functioning and geochemical cycling.
publishDate 2013
dc.date.none.fl_str_mv 2013-07
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/11336/17574
Buatois, Luis Alberto; Netto, R. G.; Mangano, Maria Gabriela; Carmona, Noelia Beatriz; Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana; Wiley; Geobiology; 11; 4; 7-2013; 307-317
1472-4677
url http://hdl.handle.net/11336/17574
identifier_str_mv Buatois, Luis Alberto; Netto, R. G.; Mangano, Maria Gabriela; Carmona, Noelia Beatriz; Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana; Wiley; Geobiology; 11; 4; 7-2013; 307-317
1472-4677
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/gbi.12038
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/gbi.12038/abstract
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 Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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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