Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia

Autores
Pacton, Muriel; Hunger, Gabriel; Martinuzzi, Vincent; Cusminsky, Gabriela Catalina; Burdin, Beatrice; Barmettler, Kurt; Vasconcelos, Crisogono; Ariztegui, Daniel
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Living stromatolites have been mostly described within shallow marine and (hyper)saline lacustrine environments. Southernmost South America lacks detailed investigations of these (organo)sedimentary buildups, particularly in regions experiencing extreme and variable environmental conditions. Here, we report and describe living freshwater stromatolites in the Maquinchao region, north‐western Patagonia, Argentina. Fossil stromatolites characterized by globular and cauliflower shapes are also present in a continuous palaeoshoreline of a former lake at an altitude of 830 m, whereas their living counterparts only occur in the calm waters of sheltered or meandering sections of the Maquinchao River. The living stromatolites and their host waters have been sampled and studied using various chemical and microscopic techniques to better constrain the environmental versus biological factors controlling their development. Our results indicate that today stromatolites only proliferate in freshwater when Ca2+ levels are high. A microscopic inspection of the living stromatolite mat indicates stronger photosynthetic activity in the upper green layer associated with crypto/microcrystalline calcite (nanoglobules) compared to the lower beige‐white biofilm. This biofilm contains more low‐Mg calcite (rhombohedra) precipitates, which can form millimetre‐sized aggregates in the underlying anoxic layer. Although sulphate‐reducing bacteria are living in the entire mat, they appear more abundant and widely distributed in the lower beige‐white layer and are always associated with Mg calcite. Low salinity and low‐turbidity water along with microbial (photosynthetic and heterotrophic) activity are the most important factors promoting low‐Mg calcite precipitation in the Maquinchao Basin. These conditions are very different from those proposed for recently described lacustrine stromatolites at high altitude in the subtropical and tropical Andes as well as in Chilean Patagonia. Hence, all these observations in modern freshwater stromatolites show the importance of geomicrobiological studies in identifying proxies of the hydrological conditions prevailing during their formation.
Fil: Pacton, Muriel. Geological Institute; Suiza
Fil: Hunger, Gabriel. Universidad de Ginebra; Suiza
Fil: Martinuzzi, Vincent. Universidad de Ginebra; Suiza
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: Burdin, Beatrice. Centre technologique des microstructures; Francia
Fil: Barmettler, Kurt. Institute of Biogeochemistry and Pollutant Dynamics; Suiza
Fil: Vasconcelos, Crisogono. Geological Institute; Suiza
Fil: Ariztegui, Daniel. Universidad de Ginebra; Suiza
Materia
Bacterial Fossils
Biomineralization
Extracellular Polimeric Susbtance
Freshwater Microbialite
Nanoglobules
Stromatolites
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60886

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network_name_str CONICET Digital (CONICET)
spelling Organomineralization processes in freshwater stromatolites: a living example from eastern PatagoniaPacton, MurielHunger, GabrielMartinuzzi, VincentCusminsky, Gabriela CatalinaBurdin, BeatriceBarmettler, KurtVasconcelos, CrisogonoAriztegui, DanielBacterial FossilsBiomineralizationExtracellular Polimeric SusbtanceFreshwater MicrobialiteNanoglobulesStromatoliteshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Living stromatolites have been mostly described within shallow marine and (hyper)saline lacustrine environments. Southernmost South America lacks detailed investigations of these (organo)sedimentary buildups, particularly in regions experiencing extreme and variable environmental conditions. Here, we report and describe living freshwater stromatolites in the Maquinchao region, north‐western Patagonia, Argentina. Fossil stromatolites characterized by globular and cauliflower shapes are also present in a continuous palaeoshoreline of a former lake at an altitude of 830 m, whereas their living counterparts only occur in the calm waters of sheltered or meandering sections of the Maquinchao River. The living stromatolites and their host waters have been sampled and studied using various chemical and microscopic techniques to better constrain the environmental versus biological factors controlling their development. Our results indicate that today stromatolites only proliferate in freshwater when Ca2+ levels are high. A microscopic inspection of the living stromatolite mat indicates stronger photosynthetic activity in the upper green layer associated with crypto/microcrystalline calcite (nanoglobules) compared to the lower beige‐white biofilm. This biofilm contains more low‐Mg calcite (rhombohedra) precipitates, which can form millimetre‐sized aggregates in the underlying anoxic layer. Although sulphate‐reducing bacteria are living in the entire mat, they appear more abundant and widely distributed in the lower beige‐white layer and are always associated with Mg calcite. Low salinity and low‐turbidity water along with microbial (photosynthetic and heterotrophic) activity are the most important factors promoting low‐Mg calcite precipitation in the Maquinchao Basin. These conditions are very different from those proposed for recently described lacustrine stromatolites at high altitude in the subtropical and tropical Andes as well as in Chilean Patagonia. Hence, all these observations in modern freshwater stromatolites show the importance of geomicrobiological studies in identifying proxies of the hydrological conditions prevailing during their formation.Fil: Pacton, Muriel. Geological Institute; SuizaFil: Hunger, Gabriel. Universidad de Ginebra; SuizaFil: Martinuzzi, Vincent. Universidad de Ginebra; SuizaFil: 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: Burdin, Beatrice. Centre technologique des microstructures; FranciaFil: Barmettler, Kurt. Institute of Biogeochemistry and Pollutant Dynamics; SuizaFil: Vasconcelos, Crisogono. Geological Institute; SuizaFil: Ariztegui, Daniel. Universidad de Ginebra; Suizainterntional Association of Sedimentology Wiley on line Library2015-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60886Pacton, Muriel; Hunger, Gabriel; Martinuzzi, Vincent; Cusminsky, Gabriela Catalina; Burdin, Beatrice; et al.; Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia; interntional Association of Sedimentology Wiley on line Library; The Depositional Record; 1; 2; 12-2015; 130-1462055-4877CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/dep2.7info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/dep2.7info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:57Zoai:ri.conicet.gov.ar:11336/60886instacron: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:34982025-09-29 09:36:57.332CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
title Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
spellingShingle Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
Pacton, Muriel
Bacterial Fossils
Biomineralization
Extracellular Polimeric Susbtance
Freshwater Microbialite
Nanoglobules
Stromatolites
title_short Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
title_full Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
title_fullStr Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
title_full_unstemmed Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
title_sort Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia
dc.creator.none.fl_str_mv Pacton, Muriel
Hunger, Gabriel
Martinuzzi, Vincent
Cusminsky, Gabriela Catalina
Burdin, Beatrice
Barmettler, Kurt
Vasconcelos, Crisogono
Ariztegui, Daniel
author Pacton, Muriel
author_facet Pacton, Muriel
Hunger, Gabriel
Martinuzzi, Vincent
Cusminsky, Gabriela Catalina
Burdin, Beatrice
Barmettler, Kurt
Vasconcelos, Crisogono
Ariztegui, Daniel
author_role author
author2 Hunger, Gabriel
Martinuzzi, Vincent
Cusminsky, Gabriela Catalina
Burdin, Beatrice
Barmettler, Kurt
Vasconcelos, Crisogono
Ariztegui, Daniel
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Bacterial Fossils
Biomineralization
Extracellular Polimeric Susbtance
Freshwater Microbialite
Nanoglobules
Stromatolites
topic Bacterial Fossils
Biomineralization
Extracellular Polimeric Susbtance
Freshwater Microbialite
Nanoglobules
Stromatolites
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Living stromatolites have been mostly described within shallow marine and (hyper)saline lacustrine environments. Southernmost South America lacks detailed investigations of these (organo)sedimentary buildups, particularly in regions experiencing extreme and variable environmental conditions. Here, we report and describe living freshwater stromatolites in the Maquinchao region, north‐western Patagonia, Argentina. Fossil stromatolites characterized by globular and cauliflower shapes are also present in a continuous palaeoshoreline of a former lake at an altitude of 830 m, whereas their living counterparts only occur in the calm waters of sheltered or meandering sections of the Maquinchao River. The living stromatolites and their host waters have been sampled and studied using various chemical and microscopic techniques to better constrain the environmental versus biological factors controlling their development. Our results indicate that today stromatolites only proliferate in freshwater when Ca2+ levels are high. A microscopic inspection of the living stromatolite mat indicates stronger photosynthetic activity in the upper green layer associated with crypto/microcrystalline calcite (nanoglobules) compared to the lower beige‐white biofilm. This biofilm contains more low‐Mg calcite (rhombohedra) precipitates, which can form millimetre‐sized aggregates in the underlying anoxic layer. Although sulphate‐reducing bacteria are living in the entire mat, they appear more abundant and widely distributed in the lower beige‐white layer and are always associated with Mg calcite. Low salinity and low‐turbidity water along with microbial (photosynthetic and heterotrophic) activity are the most important factors promoting low‐Mg calcite precipitation in the Maquinchao Basin. These conditions are very different from those proposed for recently described lacustrine stromatolites at high altitude in the subtropical and tropical Andes as well as in Chilean Patagonia. Hence, all these observations in modern freshwater stromatolites show the importance of geomicrobiological studies in identifying proxies of the hydrological conditions prevailing during their formation.
Fil: Pacton, Muriel. Geological Institute; Suiza
Fil: Hunger, Gabriel. Universidad de Ginebra; Suiza
Fil: Martinuzzi, Vincent. Universidad de Ginebra; Suiza
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: Burdin, Beatrice. Centre technologique des microstructures; Francia
Fil: Barmettler, Kurt. Institute of Biogeochemistry and Pollutant Dynamics; Suiza
Fil: Vasconcelos, Crisogono. Geological Institute; Suiza
Fil: Ariztegui, Daniel. Universidad de Ginebra; Suiza
description Living stromatolites have been mostly described within shallow marine and (hyper)saline lacustrine environments. Southernmost South America lacks detailed investigations of these (organo)sedimentary buildups, particularly in regions experiencing extreme and variable environmental conditions. Here, we report and describe living freshwater stromatolites in the Maquinchao region, north‐western Patagonia, Argentina. Fossil stromatolites characterized by globular and cauliflower shapes are also present in a continuous palaeoshoreline of a former lake at an altitude of 830 m, whereas their living counterparts only occur in the calm waters of sheltered or meandering sections of the Maquinchao River. The living stromatolites and their host waters have been sampled and studied using various chemical and microscopic techniques to better constrain the environmental versus biological factors controlling their development. Our results indicate that today stromatolites only proliferate in freshwater when Ca2+ levels are high. A microscopic inspection of the living stromatolite mat indicates stronger photosynthetic activity in the upper green layer associated with crypto/microcrystalline calcite (nanoglobules) compared to the lower beige‐white biofilm. This biofilm contains more low‐Mg calcite (rhombohedra) precipitates, which can form millimetre‐sized aggregates in the underlying anoxic layer. Although sulphate‐reducing bacteria are living in the entire mat, they appear more abundant and widely distributed in the lower beige‐white layer and are always associated with Mg calcite. Low salinity and low‐turbidity water along with microbial (photosynthetic and heterotrophic) activity are the most important factors promoting low‐Mg calcite precipitation in the Maquinchao Basin. These conditions are very different from those proposed for recently described lacustrine stromatolites at high altitude in the subtropical and tropical Andes as well as in Chilean Patagonia. Hence, all these observations in modern freshwater stromatolites show the importance of geomicrobiological studies in identifying proxies of the hydrological conditions prevailing during their formation.
publishDate 2015
dc.date.none.fl_str_mv 2015-12
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/11336/60886
Pacton, Muriel; Hunger, Gabriel; Martinuzzi, Vincent; Cusminsky, Gabriela Catalina; Burdin, Beatrice; et al.; Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia; interntional Association of Sedimentology Wiley on line Library; The Depositional Record; 1; 2; 12-2015; 130-146
2055-4877
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60886
identifier_str_mv Pacton, Muriel; Hunger, Gabriel; Martinuzzi, Vincent; Cusminsky, Gabriela Catalina; Burdin, Beatrice; et al.; Organomineralization processes in freshwater stromatolites: a living example from eastern Patagonia; interntional Association of Sedimentology Wiley on line Library; The Depositional Record; 1; 2; 12-2015; 130-146
2055-4877
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/dep2.7
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1002/dep2.7
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv interntional Association of Sedimentology Wiley on line Library
publisher.none.fl_str_mv interntional Association of Sedimentology Wiley on line Library
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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