Microbial iron mats at the Mid-Atlantic Ridge and evidence that Zetaproteobacteria may be restricted to iron-oxidizing marine systems

PloS One
Jarrod J ScottDavid Emerson

Abstract

Chemolithoautotrophic iron-oxidizing bacteria play an essential role in the global iron cycle. Thus far, the majority of marine iron-oxidizing bacteria have been identified as Zetaproteobacteria, a novel class within the phylum Proteobacteria. Marine iron-oxidizing microbial communities have been found associated with volcanically active seamounts, crustal spreading centers, and coastal waters. However, little is known about the presence and diversity of iron-oxidizing communities at hydrothermal systems along the slow crustal spreading center of the Mid-Atlantic Ridge. From October to November 2012, samples were collected from rust-colored mats at three well-known hydrothermal vent systems on the Mid-Atlantic Ridge (Rainbow, Trans-Atlantic Geotraverse, and Snake Pit) using the ROV Jason II. The goal of these efforts was to determine if iron-oxidizing Zetaproteobacteria were present at sites proximal to black smoker vent fields. Small, diffuse flow venting areas with high iron(II) concentrations and rust-colored microbial mats were observed at all three sites proximal to black smoker chimneys. A novel, syringe-based precision sampler was used to collect discrete microbial iron mat samples at the three sites. The presence of Zet...Continue Reading

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Citations

Feb 2, 2017·Microbial Ecology·Teresa CerqueiraConceição Egas
Sep 20, 2015·Applied and Environmental Microbiology·David EmersonWilliam B Bowden
Feb 5, 2019·FEMS Microbiology Ecology·Sean M McAllisterClara S Chan
May 12, 2019·Applied and Environmental Microbiology·J BuongiornoK G Lloyd
Mar 16, 2017·Frontiers in Microbiology·Blair G PaulDavid L Valentine
May 19, 2018·Genome Announcements·Hiroko MakitaKen Takai
Jul 22, 2021·Biomimetics·Hermann EhrlichTeofil Jesionowski

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Datasets Mentioned

BETA
PRJEB6986

Methods Mentioned

BETA
fluorescence microscopy
PCR
PCRs
Light microscopy

Software Mentioned

ImageJ
mothur
SINA
uchime
FigTree
kmer
phylip
GeoMapApp

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