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Potential role for microbial ureolysis in the rapid formation of carbonate tufa mounds.
Medina Ferrer, Fernando; Rosen, Michael R; Feyhl-Buska, Jayme; Russell, Virginia V; Sønderholm, Fredrik; Loyd, Sean; Shapiro, Russell; Stamps, Blake W; Petryshyn, Victoria; Demirel-Floyd, Cansu; Bailey, Jake V; Johnson, Hope A; Spear, John R; Corsetti, Frank A.
Afiliación
  • Medina Ferrer F; Department of Earth & Environmental Sciences, University of Minnesota, Twin Cities, Minneapolis, Minnesota, USA.
  • Rosen MR; US Geological Survey, California Water Science Center, Carson City, Nevada, USA.
  • Feyhl-Buska J; Department of Earth Sciences, University of Southern California, Los Angeles, California, USA.
  • Russell VV; Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, California, USA.
  • Sønderholm F; Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark.
  • Loyd S; Department of Geological Sciences, California State University Fullerton, Fullerton, California, USA.
  • Shapiro R; California State University Chico, Chico, California, USA.
  • Stamps BW; 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio, USA.
  • Petryshyn V; UES, Inc., Dayton, Ohio, USA.
  • Demirel-Floyd C; Environmental Studies Program, University of Southern California, Los Angeles, California, USA.
  • Bailey JV; School of Geosciences, University of Oklahoma, Norman, Oklahoma, USA.
  • Johnson HA; Department of Earth & Environmental Sciences, University of Minnesota, Twin Cities, Minneapolis, Minnesota, USA.
  • Spear JR; Department of Biological Science, California State University Fullerton, Fullerton, California, USA.
  • Corsetti FA; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, Colorado, USA.
Geobiology ; 20(1): 79-97, 2022 01.
Article en En | MEDLINE | ID: mdl-34337850
Modern carbonate tufa towers in the alkaline (~pH 9.5) Big Soda Lake (BSL), Nevada, exhibit rapid precipitation rates (exceeding 3 cm/year) and host diverse microbial communities. Geochemical indicators reveal that carbonate precipitation is, in part, promoted by the mixing of calcium-rich groundwater and carbonate-rich lake water, such that a microbial role for carbonate precipitation is unknown. Here, we characterize the BSL microbial communities and evaluate their potential effects on carbonate precipitation that may influence fast carbonate precipitation rates of the active tufa mounds of BSL. Small subunit rRNA gene surveys indicate a diverse microbial community living endolithically, in interior voids, and on tufa surfaces. Metagenomic DNA sequencing shows that genes associated with metabolisms that are capable of increasing carbonate saturation (e.g., photosynthesis, ureolysis, and bicarbonate transport) are abundant. Enzyme activity assays revealed that urease and carbonic anhydrase, two microbial enzymes that promote carbonate precipitation, are active in situ in BSL tufa biofilms, and urease also increased calcium carbonate precipitation rates in laboratory incubation analyses. We propose that, although BSL tufas form partially as a result of water mixing, tufa-inhabiting microbiota promote rapid carbonate authigenesis via ureolysis, and potentially via bicarbonate dehydration and CO2 outgassing by carbonic anhydrase. Microbially induced calcium carbonate precipitation in BSL tufas may generate signatures preserved in the carbonate microfabric, such as stromatolitic layers, which could serve as models for developing potential biosignatures on Earth and elsewhere.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbonatos / Microbiota Idioma: En Revista: Geobiology Asunto de la revista: BIOLOGIA Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Carbonatos / Microbiota Idioma: En Revista: Geobiology Asunto de la revista: BIOLOGIA Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido