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Microbially promoted calcite precipitation in the pelagic redoxcline: Elucidating the formation of the turbid layer

Leberecht, Kerstin M. ; Ritter, Simon M. ; Lapp, Christian J. ; Klose, Lukas ; Eschenröder, Julian ; Scholz, Christian ; Kühnel, Sebastian ; Stinnesbeck, Wolfgang ; Kletzin, Arnulf ; Isenbeck‐Schröter, Margot ; Gescher, Johannes (2022)
Microbially promoted calcite precipitation in the pelagic redoxcline: Elucidating the formation of the turbid layer.
In: Geobiology, 2022, 20 (4)
doi: 10.26083/tuprints-00022442
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Microbially promoted calcite precipitation in the pelagic redoxcline: Elucidating the formation of the turbid layer
Language: English
Date: 7 October 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: John Wiley & Sons
Journal or Publication Title: Geobiology
Volume of the journal: 20
Issue Number: 4
DOI: 10.26083/tuprints-00022442
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Large bell‐shaped calcite formations called "Hells Bells" were discovered underwater in the stratified cenote El Zapote on the Yucatán Peninsula, Mexico. Together with these extraordinary speleothems, divers found a white, cloudy turbid layer into which some Hells Bells partially extend. Here, we address the central question if the formation of the turbid layer could be based on microbial activity, more specifically, on microbially induced calcite precipitation. Metagenomic and metatranscriptomic profiling of the microbial community in the turbid layer, which overlaps with the pelagic redoxcline in the cenote, revealed chemolithoautotrophic Hydrogenophilales and unclassified β‐Proteobacteria as the metabolic key players. Bioinformatic and hydrogeochemical data suggest chemolithoautotrophic oxidation of sulfide to zero‐valent sulfur catalyzed by denitrifying organisms due to oxygen deficiency. Incomplete sulfide oxidation via nitrate reduction and chemolithoautotrophy are both proton‐consuming processes, which increase the pH in the redoxcline favoring authigenic calcite precipitation and may contribute to Hells Bells growth. The observed mechanism of microbially induced calcite precipitation is potentially applicable to many other stagnant sulfate‐rich water bodies.

Uncontrolled Keywords: biogeochemistry, chemolithoautotrophy, microbially induced calcite precipitation, redoxcline, sulfide oxidation
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-224429
Classification DDC: 500 Science and mathematics > 570 Life sciences, biology
900 History and geography > 910 Geography and travel
Divisions: 10 Department of Biology > Sulfur Biochemistry and Microbial Bioenergetics
Date Deposited: 07 Oct 2022 13:12
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22442
PPN: 500224447
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