ArticleScientific reports2021
Modern dolomite formation caused by seasonal cycling of oxygenic phototrophs and anoxygenic phototrophs in a hypersaline sabkha.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 59 citations in OpenAlex.
- Characterizing carbonate mineral-forming bacterial strains and their carbonic anhydrase activities in two coastal sabkhas.Biochemistry and biophysics reports · 2025Article
- Do coastal salt mudflats (sabkhas) contribute to the blue carbon sequestration?Biogeochemistry · 2025Article
- Microbial diversity in polyextreme salt flats and their potential applications.Environmental science and pollution research international · 2024Review
- Variability of blue carbon storage in arid evaporitic environment of two coastal Sabkhas or mudflats.Scientific reports · 2023Article
- Tropical lacustrine sediment microbial community response to an extreme El Niño event.Scientific reports · 2023Article
- Metagenomic, (bio)chemical, and microscopic analyses reveal the potential for the cycling of sulfated EPS in Shark Bay pustular mats.ISME communications · 2022Article
- High Mg/Ca Molar Ratios Promote Protodolomite Precipitation Induced by the Extreme Halophilic BacteriumFrontiers in microbiology · 2022Article
- Controlling pore-scale processes to tame subsurface biomineralization.Re/views in environmental science and bio/technology · 2022Review
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Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The "Dolomite Problem" has been a controversy for over a century, owing to massive assemblages of low-temperature dolomite in ancient rocks with little dolomite forming today despite favorable geochemical conditions. Experiments show that microbes and their exopolymeric substances (EPS) nucleate dolomite. However, factors controlling ancient abundances of dolomite can still not be explained. To decode the enigma of ancient dolomite, we examined a modern dolomite forming environment, and found that a cyclic shift in microbial community between cyanobacteria and anoxygenic phototrophs creates EPS suited to dolomite precipitation. Specifically, EPS show an increased concentration of carboxylic functional groups as microbial composition cycles from cyanobacterial to anoxygenic phototroph driven communities at low-and high- salinity, respectively. Comparing these results to other low-T forming environments suggests that large turnover of organic material under anoxic conditions is an important driver of the process. Consequently, the shift in atmospheric oxygen throughout Earth's history may explain important aspects of "The Dolomite Problem". Our results provide new context for the interpretation of dolomite throughout Earth's history.
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Registered trials
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