Intracellular and extracellular mineralization of a microbial community in the Edmond deep-sea vent field environment

Peng, Xiaotong; Zhou, Huaiyang; Li, Jiangtao; Li, Jiwei; Chen, Shun; Yao, Huiqiang; Wu, Zucheng

doi:10.1016/j.sedgeo.2010.06.003

Cited by 21 publications

(15 citation statements)

References 68 publications

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“…Some structures are remarkably similar to biogenic Fe oxyhydroxide-encrusted microbial structures described from hydrothermal vents of the Juan de Fuca Ridge2223, and the Loihi seamount14. Mineralized microbe structures described from Edmond vent field24, the Lau Basin hydrothermal field25, and the Giggenbach submarine volcano26, are also commonly found in the “Politeia” samples.…”

Section: Resultsmentioning

confidence: 57%

New insights into hydrothermal vent processes in the unique shallow-submarine arc-volcano, Kolumbo (Santorini), Greece

Kilias

Nomikou

Papanikolaou

et al. 2013

Sci Rep

103

114

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We report on integrated geomorphological, mineralogical, geochemical and biological investigations of the hydrothermal vent field located on the floor of the density-stratified acidic (pH ~ 5) crater of the Kolumbo shallow-submarine arc-volcano, near Santorini. Kolumbo features rare geodynamic setting at convergent boundaries, where arc-volcanism and seafloor hydrothermal activity are occurring in thinned continental crust. Special focus is given to unique enrichments of polymetallic spires in Sb and Tl (±Hg, As, Au, Ag, Zn) indicating a new hybrid seafloor analogue of epithermal-to-volcanic-hosted-massive-sulphide deposits. Iron microbial-mat analyses reveal dominating ferrihydrite-type phases, and high-proportion of microbial sequences akin to "Nitrosopumilus maritimus", a mesophilic Thaumarchaeota strain capable of chemoautotrophic growth on hydrothermal ammonia and CO2. Our findings highlight that acidic shallow-submarine hydrothermal vents nourish marine ecosystems in which nitrifying Archaea are important and suggest ferrihydrite-type Fe3+-(hydrated)-oxyhydroxides in associated low-temperature iron mats are formed by anaerobic Fe2+-oxidation, dependent on microbially produced nitrate.

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Section: Resultsmentioning

confidence: 57%

New insights into hydrothermal vent processes in the unique shallow-submarine arc-volcano, Kolumbo (Santorini), Greece

Kilias

Nomikou

Papanikolaou

et al. 2013

Sci Rep

103

114

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“…Samples were treated following the method described by Peng et al . []. Small fragments of the precipitates were fixed in 2% glutaraldehyde by washing three times in 0.1 M phosphate buffer with a pH of 7.4, further fixed with osmium tetroxide at 4°C for 2 h, and dehydrated through a series of ethanol solutions (10, 20, 30, 40, 50, 60, 70, 80, 90, and 100%, 10 min each).…”

Section: Methodsmentioning

confidence: 99%

Formation of biogenic sheath‐like Fe oxyhydroxides in a near‐neutral pH hot spring: Implications for the origin of microfossils in high‐temperature, Fe‐rich environments

Peng

Chen

2013

JGR Biogeosciences

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[1] A small hot spring that is informally called "Fe-waterfall spring" and is located in the Rehai geothermal area discharges hot (42 to 73°C), near-neutral (pH = 7.65) Fe-rich water. Submerged reddish precipitates are composed largely of ferrihydrite, goethite, lepidocrocite, opal-A, quartz, and anorthite, as revealed by X-ray diffraction (XRD) and Mössbauer spectroscopy. Molecular phylogenetic analysis demonstrates that the bacterial community in these precipitates is mainly composed of Cyanobacteria, Planctomycetes, β-proteobacteria, Deinococci-Thermus, and Chlorobi. Scanning electron microscopy and high-resolution transmission electron microscopy examinations show that abundant sheath-like Fe oxyhydroxides, which exhibit different morphologies and sizes, are present in Fe-rich precipitates. These sheath-like structures are composed of ferrihydrite rather than more crystalline lepidocrocite or goethite. Energy-dispersive X-ray spectrometer, scanning transmission electron microscopy, and nano secondary ion mass spectrometry reveal that they are mainly composed of Fe, Si, and O, together with some trace elements. Most of the sheath-like structures are not morphologically comparable to biogenic Fe oxyhydroxides produced by known chemolithotrophic Fe oxidizers, which is consistent with the fact that no chemolithotrophic Fe oxidizers were identified by molecular analysis in the precipitates. We suggest that the sheath-like Fe oxyhydroxides are formed through passive Fe sorption and nucleation onto the cell walls of various thermophiles rather than by the direct metabolic activities of chemolithotrophic Fe oxidizers. Biogenic sheath-like Fe oxyhydroxides in Fe-waterfall spring have important implications for geochemical cycles driven by microorganisms, the origin of microfossils, and the formation of banded iron formations (BIFs) in the Archean ocean.Citation: Peng, X., S. Chen, and H. Xu (2013), Formation of biogenic sheath-like Fe oxyhydroxides in a near-neutral pH hot spring: Implications for the origin of microfossils in high-temperature, Fe-rich environments, J. Geophys. Res.

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“…Hydrothermal fluid in this field is characterized by high contents of iron, silica, high H 2 S with high chlorinity and low pH (Gallant and Von Damm, 2006). Extensive interactions among microbes, iron and silica have been observed in the low temperature microbial mats from this hydrothermal vent field (Peng et al, 2007(Peng et al, , 2010.…”

Section: The Kairei and Edmond Hydrothermal Fieldsmentioning

confidence: 96%

Characteristics and source of inorganic and organic compounds in the sediments from two hydrothermal fields of the Central Indian and Mid-Atlantic Ridges

Peng

Zhou

et al. 2011

Journal of Asian Earth Sciences

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Intracellular and extracellular mineralization of a microbial community in the Edmond deep-sea vent field environment

Cited by 21 publications

References 68 publications

New insights into hydrothermal vent processes in the unique shallow-submarine arc-volcano, Kolumbo (Santorini), Greece

New insights into hydrothermal vent processes in the unique shallow-submarine arc-volcano, Kolumbo (Santorini), Greece

Formation of biogenic sheath‐like Fe oxyhydroxides in a near‐neutral pH hot spring: Implications for the origin of microfossils in high‐temperature, Fe‐rich environments

Characteristics and source of inorganic and organic compounds in the sediments from two hydrothermal fields of the Central Indian and Mid-Atlantic Ridges

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