Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland
The microbial communities inferred in silica sinter rocks, based on multiscale morphological features (fabrics and textures) and the presence of lipid biomarkers and their carbon isotopic composition, are evaluated in the Krýsuvík geothermal area of Iceland. Close to vent environments (T > 75 °C...
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2021
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Online Access: | https://research.vu.nl/en/publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 https://doi.org/10.3390/min11030263 https://hdl.handle.net/1871.1/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 http://www.scopus.com/inward/record.url?scp=85101911986&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85101911986&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 2024-09-15T18:13:55+00:00 Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland Álvaro, Jose Javier Sánchez-Román, Mónica Nierop, Klaas G.J. Peterse, Francien 2021-03 https://research.vu.nl/en/publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 https://doi.org/10.3390/min11030263 https://hdl.handle.net/1871.1/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 http://www.scopus.com/inward/record.url?scp=85101911986&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85101911986&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 info:eu-repo/semantics/openAccess Álvaro , J J , Sánchez-Román , M , Nierop , K G J & Peterse , F 2021 , ' Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland ' , Minerals , vol. 11 , no. 3 , 263 , pp. 1-31 . https://doi.org/10.3390/min11030263 Biomarker Carbon isotope Fabric Microbial mat Silicified microbe Texture /dk/atira/pure/sustainabledevelopmentgoals/life_on_land name=SDG 15 - Life on Land /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2021 ftvuamstcris https://doi.org/10.3390/min11030263 2024-09-05T00:23:22Z The microbial communities inferred in silica sinter rocks, based on multiscale morphological features (fabrics and textures) and the presence of lipid biomarkers and their carbon isotopic composition, are evaluated in the Krýsuvík geothermal area of Iceland. Close to vent environments (T > 75 °C and pH 1.7‒3), stream floors are capped with homogeneous vitreous crusts and breccia levels, with no distinct recognizable silicified microbes. About 4 m far from the vents (T 75‒60 °C and pH 3‒6) and beyond (T < 60 °C and pH 6‒7.6), microbial sinters, including wavy and palisade laminated and bubble fabrics, differ between abandoned meanders and desiccated ponds. Fabric and texture variances are related to changes in the ratio of filament/coccoid silicified microbes and associated porosity. Coatings of epicellular silica, less than 2 µm thick, favor identification of indi-vidual microbial filaments, whereas coalescence of opal spheres into agglomerates precludes recognition of original microbial textures and silicified microbes. Episodic fluctuations in the physico-chemical conditions of surface waters controlled the acidic hydrolysis of biomarkers. Wavy laminated fabrics from pond margins comprise fatty acids, mono-and dialkyl glycerol, mono-and di-ethers, monoalkyl glycerol esters and small traces of 10-methyl branched C16 and C18 fatty acids and archaeol, indicative of intergrowths of cyanobacteria, Aquificales, and sulfate reducing bacteria and methanogenic archaea. In contrast, wavy laminated fabrics from abandoned meanders and palisade laminated fabrics from ponds differ in their branched fatty acids and the presence vs. absence of bacteriohopanetetrol, reflecting different cyanobacterial contributions. δ 13 C values of biomarkers range from −22.7 to −32.9‰, but their values in the wavy (pond) and bubble fabrics have much wider ranges than those of the wavy (meander), palisade, and vitreous fabrics, reflecting dissolved inorganic carbon (DIC) sources and a decrease in 13 C downstream outflow channels, with ... Article in Journal/Newspaper Iceland Vrije Universiteit Amsterdam (VU): Research Portal Minerals 11 3 263 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Biomarker Carbon isotope Fabric Microbial mat Silicified microbe Texture /dk/atira/pure/sustainabledevelopmentgoals/life_on_land name=SDG 15 - Life on Land /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Biomarker Carbon isotope Fabric Microbial mat Silicified microbe Texture /dk/atira/pure/sustainabledevelopmentgoals/life_on_land name=SDG 15 - Life on Land /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Álvaro, Jose Javier Sánchez-Román, Mónica Nierop, Klaas G.J. Peterse, Francien Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
topic_facet |
Biomarker Carbon isotope Fabric Microbial mat Silicified microbe Texture /dk/atira/pure/sustainabledevelopmentgoals/life_on_land name=SDG 15 - Life on Land /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
The microbial communities inferred in silica sinter rocks, based on multiscale morphological features (fabrics and textures) and the presence of lipid biomarkers and their carbon isotopic composition, are evaluated in the Krýsuvík geothermal area of Iceland. Close to vent environments (T > 75 °C and pH 1.7‒3), stream floors are capped with homogeneous vitreous crusts and breccia levels, with no distinct recognizable silicified microbes. About 4 m far from the vents (T 75‒60 °C and pH 3‒6) and beyond (T < 60 °C and pH 6‒7.6), microbial sinters, including wavy and palisade laminated and bubble fabrics, differ between abandoned meanders and desiccated ponds. Fabric and texture variances are related to changes in the ratio of filament/coccoid silicified microbes and associated porosity. Coatings of epicellular silica, less than 2 µm thick, favor identification of indi-vidual microbial filaments, whereas coalescence of opal spheres into agglomerates precludes recognition of original microbial textures and silicified microbes. Episodic fluctuations in the physico-chemical conditions of surface waters controlled the acidic hydrolysis of biomarkers. Wavy laminated fabrics from pond margins comprise fatty acids, mono-and dialkyl glycerol, mono-and di-ethers, monoalkyl glycerol esters and small traces of 10-methyl branched C16 and C18 fatty acids and archaeol, indicative of intergrowths of cyanobacteria, Aquificales, and sulfate reducing bacteria and methanogenic archaea. In contrast, wavy laminated fabrics from abandoned meanders and palisade laminated fabrics from ponds differ in their branched fatty acids and the presence vs. absence of bacteriohopanetetrol, reflecting different cyanobacterial contributions. δ 13 C values of biomarkers range from −22.7 to −32.9‰, but their values in the wavy (pond) and bubble fabrics have much wider ranges than those of the wavy (meander), palisade, and vitreous fabrics, reflecting dissolved inorganic carbon (DIC) sources and a decrease in 13 C downstream outflow channels, with ... |
format |
Article in Journal/Newspaper |
author |
Álvaro, Jose Javier Sánchez-Román, Mónica Nierop, Klaas G.J. Peterse, Francien |
author_facet |
Álvaro, Jose Javier Sánchez-Román, Mónica Nierop, Klaas G.J. Peterse, Francien |
author_sort |
Álvaro, Jose Javier |
title |
Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
title_short |
Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
title_full |
Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
title_fullStr |
Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
title_full_unstemmed |
Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland |
title_sort |
multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, krýsuvík geothermal field, iceland |
publishDate |
2021 |
url |
https://research.vu.nl/en/publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 https://doi.org/10.3390/min11030263 https://hdl.handle.net/1871.1/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 http://www.scopus.com/inward/record.url?scp=85101911986&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85101911986&partnerID=8YFLogxK |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Álvaro , J J , Sánchez-Román , M , Nierop , K G J & Peterse , F 2021 , ' Multiscale microbial preservation and biogeochemical signals in a modern hot-spring siliceous sinter rich in co2 emissions, Krýsuvík geothermal field, Iceland ' , Minerals , vol. 11 , no. 3 , 263 , pp. 1-31 . https://doi.org/10.3390/min11030263 |
op_relation |
https://research.vu.nl/en/publications/1f4731f3-fa0b-44a5-b73b-9c9f20c1fa38 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/min11030263 |
container_title |
Minerals |
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11 |
container_issue |
3 |
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263 |
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1810451699830095872 |