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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ftconicet:oai:ri.conicet.gov.ar:11336/17574 2023-10-09T21:44:51+02:00 Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana Buatois, Luis Alberto Netto, R. G. Mangano, Maria Gabriela Carmona, Noelia Beatriz application/pdf http://hdl.handle.net/11336/17574 eng eng Wiley 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 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 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Microbial Mats Gondwana Paleozoic Deglaciation https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1111/gbi.12038 2023-09-24T20:10:18Z 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. Fil: Buatois, Luis Alberto. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Netto, R. G. Universidade do Vale do Rio dos Sinos; Brasil Fil: Mangano, Maria Gabriela. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Carmona, Noelia Beatriz. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Article in Journal/Newspaper Antarc* Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Carmona ENVELOPE(-62.917,-62.917,-64.900,-64.900) Geobiology 11 4 307 317 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Microbial Mats Gondwana Paleozoic Deglaciation https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Microbial Mats Gondwana Paleozoic Deglaciation https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 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 |
topic_facet |
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. Fil: Buatois, Luis Alberto. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Netto, R. G. Universidade do Vale do Rio dos Sinos; Brasil Fil: Mangano, Maria Gabriela. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Carmona, Noelia Beatriz. University Of Saskatchewan; Canadá. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Buatois, Luis Alberto Netto, R. G. Mangano, Maria Gabriela Carmona, Noelia Beatriz |
author_facet |
Buatois, Luis Alberto Netto, R. G. Mangano, Maria Gabriela Carmona, Noelia Beatriz |
author_sort |
Buatois, Luis Alberto |
title |
Global deglaciation and the re-appearance of microbial matground-dominated ecosystems in the late Paleozoic of Gondwana |
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 |
publisher |
Wiley |
url |
http://hdl.handle.net/11336/17574 |
long_lat |
ENVELOPE(-62.917,-62.917,-64.900,-64.900) |
geographic |
Argentina Carmona |
geographic_facet |
Argentina Carmona |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
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 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 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1111/gbi.12038 |
container_title |
Geobiology |
container_volume |
11 |
container_issue |
4 |
container_start_page |
307 |
op_container_end_page |
317 |
_version_ |
1779313984162234368 |