Bioinduced precipitation of smectites and carbonates in photosynthetic diatom-rich microbial mats: Effect of culture medium

Buey, Pablo Del; Sanz‐Montero, M. Esther; Sánchez‐Román, Mónica

doi:10.1016/j.clay.2023.106932

Cited by 3 publications

(3 citation statements)

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“…Most of the existing efforts on micritization have been based on geological and geochemical observations, coupled with studies on pure microbial cultures (e.g., del Buey et al, 2023; Garcia‐Pichel et al, 2010; Popall et al, 2020; Sánchez‐Román et al, 2008; Sánchez‐Román, McKenzie, et al, 2009; Sánchez‐Román, Vasconcelos, et al, 2009; Sánchez‐Román, McKenzie, et al, 2011; Sánchez‐Román, Romanek, et al, 2011). Several of these studies have been driven by a rational analysis of metabolic pathways that move electrons and affect alkalinity and have been verified for microbiome taxonomy and functions through the most advanced molecular technologies (Widder et al, 2016).…”

Section: Are We Missing Something?mentioning

confidence: 99%

“…Their RuBisCO and carbonic anhydrase enzymes can intensively sequester protons, increasing the local alkalinity and supporting carbonate precipitation. They also produce abundant negatively charged EPS and mucoid sheaths, further promoting carbonate precipitation and crystal nucleation, eventually contributing to grain cementation (Cutts et al, 2022;del Buey et al, 2023;Görgen et al, 2021;Kobluk & Risk, 1977a, 1977bPopall et al, 2020;Robles-Fernandez et al, 2022;Sanz-Montero et al, 2023). However, the presence of photoautotrophs is usually restricted to the first layers of the sediments (0-5 cm depth), and their abundance represents only a limited part of the microbial communities dwelling in carbonate settings (S anchez- Baracaldo et al, 2022;Sørensen et al, 2007).…”

Section: How Do Photoautotrophs Contribute?mentioning

confidence: 99%

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Searching for microbial contribution to micritization of shallow marine sediments

Garuglieri,

Marasco,

Odobel

et al. 2024

Environmental Microbiology

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Micritization is an early diagenetic process that gradually alters primary carbonate sediment grains through cycles of dissolution and reprecipitation of microcrystalline calcite (micrite). Typically observed in modern shallow marine environments, micritic textures have been recognized as a vital component of storage and flow in hydrocarbon reservoirs, attracting scientific and economic interests. Due to their endolithic activity and the ability to promote nucleation and reprecipitation of carbonate crystals, microorganisms have progressively been shown to be key players in micritization, placing this process at the boundary between the geological and biological realms. However, published research is mainly based on geological and geochemical perspectives, overlooking the biological and ecological complexity of microbial communities of micritized sediments. In this paper, we summarize the state‐of‐the‐art and research gaps in micritization from a microbial ecology perspective. Since a growing body of literature successfully applies in vitro and in situ ‘fishing’ strategies to unveil elusive microorganisms and expand our knowledge of microbial diversity, we encourage their application to the study of micritization. By employing these strategies in micritization research, we advocate promoting an interdisciplinary approach/perspective to identify and understand the overlooked/neglected microbial players and key pathways governing this phenomenon and their ecology/dynamics, reshaping our comprehension of this process.

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Section: Are We Missing Something?mentioning

confidence: 99%

Section: How Do Photoautotrophs Contribute?mentioning

confidence: 99%

Searching for microbial contribution to micritization of shallow marine sediments

Garuglieri,

Marasco,

Odobel

et al. 2024

Environmental Microbiology

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“…It is widely accepted that benthic and, to a lesser extent, planktonic microorganisms can catalyze the nucleation of dolomite in alkaline lakes [9,[11][12][13][14][15][16]. Multiple field and laboratory studies have demonstrated that the precipitation of dolomite at low-temperature occurs in specific metabolic pathways, including sulfate reduction [11,[17][18][19], sulfide oxidation [20], aerobic respiration [21], methanogenesis [22,23], methane oxidation [24], oxygenic [25,26] and anoxygenic [27] photosynthesis, although the mineralization of microbial mats is commonly a result of the interplay between different metabolisms [28].…”

Section: Introductionmentioning

confidence: 99%

Isotopic Signatures of Microbial Mg-Carbonates Deposited in an Ephemeral Hyperalkaline Lake (Central Spain): Paleoenvironmental Implications

et al. 2023

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Interpretation of stable isotope (C and O) composition of lacustrine carbonates requires in-depth knowledge about the interplay between the abiotic and biotic processes in sedimentary environments. The present study, focused on Mg-carbonates from a well-characterized alkaline and ephemeral lake, gives new insight into the behavior of the stable isotopes during the seasonal precipitation of a variety of carbonates. Dolomite and Mg-calcite precipitate intracellularly within Spirogyra during spring and show lighter isotopic signatures (δ13C aver. −4.10‰ and δ18O aver. −0.75‰, VPDB) than a second association of carbonates, such as hydromagnesite, northupite and traces of magnesite among other sodium-bearing carbonates (δ13C aver., −1.34‰ and δ18O aver. 4.52‰, VPDB). The latter precipitate in association with degraded microbial mats as the lake desiccates during summer. Covariant trends between carbonate δ13C and δ18O reflect isotope enrichment related to evapoconcentration. The seasonal cycling of inorganic carbon among carbonate minerals, microbial biomass, lake water and pore water was also analyzed, revealing variations of δ13C within a range of −12.40‰ to −0.43‰. The more depleted 13C derives from the decay of the microbial mats. The less negative values are distinctive of the bulk carbonates forming crusts in summer. Intracellular calcite and dolomite have δ13C and δ18O values (VPDB) ranging, from −5.45‰ to −3.07‰ and −2.48‰ to 1.58‰, respectively, that are intermediate between those two endmembers. These intracellular carbonates are enriched in 13C by 5‰ with respect to dissolved inorganic carbon (δ13C in the range of −11.79‰ to −6.87‰, VPDB) due to the vital effect of photosynthesis. The crust of carbonates deposited as the lake desiccates dissolve interannually. Alternatively, dolomite and Mg-calcite as well as their isotopic compositions persist during synsedimentary diagenesis, confirming that carbonate biominerals provide isotopic signatures related to the environmental conditions of formation with potential of preservation in the rock record.

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Preliminary spectroscopic investigation of a potential Mars analog site: Lake Bagno dell’Acqua, Pantelleria, Italy

Bruschini,

Ferrari,

Mazzoni

et al. 2024

Planetary and Space Science

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Bioinduced precipitation of smectites and carbonates in photosynthetic diatom-rich microbial mats: Effect of culture medium

Cited by 3 publications

References 65 publications

Searching for microbial contribution to micritization of shallow marine sediments

Searching for microbial contribution to micritization of shallow marine sediments

Isotopic Signatures of Microbial Mg-Carbonates Deposited in an Ephemeral Hyperalkaline Lake (Central Spain): Paleoenvironmental Implications

Preliminary spectroscopic investigation of a potential Mars analog site: Lake Bagno dell’Acqua, Pantelleria, Italy

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