The role of cyanobacteria in crystallization of magnesium calcites

Zaitseva, L. V.; Orleanskii, V. K.; Герасименко, Л. М.; Ushatinskaya, G. T.

doi:10.1134/s003103010602002x

Cited by 16 publications

(12 citation statements)

References 6 publications

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“…SEM analysis on this sample has revealed diffused mucous film (Fig. 11c) similar to bacterial Extracellular Polymeric Substances (EPS) Zaitseva et al, 2006). Carbonates in the Mediterranean that show these characteristics have been found also at water depth of more than 500 m and associated with mud volcanoes and pockmarks (Gontharet et al, 2007).…”

Section: Discussionmentioning

confidence: 96%

Methane-Derived Authigenic Carbonates (MDAC) in northern-central Adriatic Sea: Relationships between reservoir and methane seepages

et al. 2012

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Section: Discussionmentioning

confidence: 96%

Methane-Derived Authigenic Carbonates (MDAC) in northern-central Adriatic Sea: Relationships between reservoir and methane seepages

et al. 2012

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“…Furthermore, Braissant et al (2003) were able to form spherulites similar to those found in natural environments using extracellular polysaccharidic media; demonstrating the influence of bacterial outer structure composition on the morphology and mineralogy of bacterially induced calcium carbonate. In addition, numerous studies have shown that heterotrophic bacteria (Warthmann et al, 2000;Roberts et al, 2004;López-García et al, 2005;Rodriguez-Navarro et al, 2007) and cyanobacteria (Thompson & Ferris, 1990;Dittrich et al, 2003;Lee et al, 2006;Zaitseva et al, 2006;Power et al, 2007) may mediate carbonate precipitation. Periphyton in general has been implicated in tufa deposition (Primc-Habdija et al, 2001), and algae and diatoms have been shown to mediate calcium carbonate precipitation in batch culture experiments (Heath et al, 1995).…”

Section: Role Of Microbes In Spherulite Formationmentioning

confidence: 99%

Modern carbonate microbialites from an asbestos open pit pond, Yukon, Canada

et al. 2011

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Microbialites were discovered in an open pit pond at an abandoned asbestos mine near Clinton Creek, Yukon, Canada. These microbialites are extremely young and presumably began forming soon after the mine closed in 1978. Detailed characterization of the periphyton and microbialites using light and scanning electron microscopy was coupled with mineralogical and isotopic analyses to investigate the mechanisms by which these microbialites formed. The microbialites are columnar in form (cm scale), have an internal spherulitic fabric (mm scale), and are mostly made of aragonite, which is supersaturated in the subsaline pond water. Initial precipitation is seen as acicular aragonite crystals nucleating onto microbial biomass and detrital particles. Continued precipitation entombs benthic diatoms (e.g. Brachysira vitrea), filamentous algae (e.g. Oedogonium sp.), dinoflagellates, and cyanobacteria. The presence of phototrophs at spherulite centers strongly suggests that these microbes play an important initial role in aragonite precipitation. Substantial growth of individual spherulites occurs abiotically through periodic precipitation of aragonite that forms concentric laminations around spherulite centers while pauses in spherulite growth allow for colonization by microbes. Aragonite associated with biomass (δ(13)C = -4.6‰ VPDB) showed a (13)C-enrichment of 0.8‰ relative to aragonite exhibiting no biomass (δ(13)C = -5.4‰ VPDB), which suggests a modest removal of isotopically light dissolved inorganic carbon by phototrophs. The combination of a low sedimentation rate, high calcification rate, and low microbial growth rate appears to result in the formation of these microbialites. The formation of microbialites at an historic mine site demonstrates that an anthropogenically constructed environment can foster microbial carbonate formation.

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“…Although evidence has been found that some carbonate precipitate is closely attached to EPS, the exact role of specific molecules in dolomite precipitation still needs to be further determined . Recently, magnesium‐rich carbonates formation has been demonstrated in the presence of cyanobacteria . Cyanobacteria have been recognized as the key producers of EPS in microbial mats .…”

Section: Introductionmentioning

confidence: 99%

2D Raman spectroscopy study of dolomite and cyanobacterial extracellular polymeric substances from Khor Al‐Adaid sabkha (Qatar)

Paulo

Dittrich

2013

J Raman Spectroscopy

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Dolomite precipitation, limited at low temperature, appears to be impacted by microbial extracellular polymeric substances (EPS). The presence of dolomites has been reported in the extreme environments of Arabian Gulf sabkhas. Many of these sites are characterized by extensive growth of cyanobacterial mats that are recognized as key producers of EPS. However, no information has been gathered on the cyanobacterial EPS involvement in dolomite precipitation. The objective of this study was to obtain in situ information on the spatial distribution of cyanobacterial EPS and dolomite in Khor Al‐Adaid sabkha (Qatar) sediments by chemical mapping. For this purpose, in situ 2D Raman spectroscopy and atomic force microscopy were applied. Additionally, samples were analyzed with scanning electron microscopy and X‐ray diffraction. Raman fingerprints of dolomite (300, 725, and 1098 cm−1), cyanobacteria, and their EPS (1000, 1130, 1148, and 1508 cm−1) were observed widely distributed in the top 2 cm of the sabkhas sediments. 2D chemical imaging of sediment layers characterized minerals and organic matter of microbial origins at high spatial resolution. Raman mapping indicated small dolomite clusters (<2 µm) embedded in a dense cyanobacterial EPS matrix. The spatial distribution showed that small dolomite clusters are closely associated with cyanobacterial EPS and organic carbon. Our results prove that cyanobacterial molecules are closely related to dolomite in the sabkhas sediments. This study demonstrated that Raman mapping is a robust and sensitive technique for acquisition of in situ information on cell–mineral interactions. Copyright © 2013 John Wiley & Sons, Ltd.

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The role of cyanobacteria in crystallization of magnesium calcites

Cited by 16 publications

References 6 publications

Methane-Derived Authigenic Carbonates (MDAC) in northern-central Adriatic Sea: Relationships between reservoir and methane seepages

Methane-Derived Authigenic Carbonates (MDAC) in northern-central Adriatic Sea: Relationships between reservoir and methane seepages

Modern carbonate microbialites from an asbestos open pit pond, Yukon, Canada

2D Raman spectroscopy study of dolomite and cyanobacterial extracellular polymeric substances from Khor Al‐Adaid sabkha (Qatar)

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