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A moderately thermophilic ammonia-oxidizing crenarchaeote from a hot spring
TLDR
The enriched AOA, which is provisionally classified as “Candidatus Nitrososphaera gargensis,” is the first described thermophilic ammonia oxidizer and the first member of the crenarchaeotal group I.1b for which ammonium oxidation has been verified on a cellular level.
Complete nitrification by Nitrospira bacteria
TLDR
The discovery and cultivation of a completely nitrifying bacterium from the genus Nitrospira, a globally distributed group of nitrite oxidizers, and the genome of this chemolithoautotrophic organism encodes the pathways both for ammonia and nitrite oxidation.
In Situ Characterization ofNitrospira-Like Nitrite-Oxidizing Bacteria Active in Wastewater Treatment Plants
TLDR
Two 16S rRNA-directed oligonucleotide probes specific for the phylum and genus Nitrospira were developed and evaluated for suitability for fluorescence in situ hybridization (FISH) and used to investigate the in situ architecture of cell aggregates of Nitro Spira-like nitrite oxidizers in wastewater treatment plants.
A Nitrospira metagenome illuminates the physiology and evolution of globally important nitrite-oxidizing bacteria
TLDR
Comparison genomic analyses indicate functionally significant lateral gene-transfer events between the genus Nitrospira and anaerobic ammonium-oxidizing planctomycetes, which share highly similar forms of NXR and other proteins reflecting that two key processes of the nitrogen cycle are evolutionarily connected.
Deciphering the evolution and metabolism of an anammox bacterium from a community genome
TLDR
This work uses environmental genomics—the reconstruction of genomic data directly from the environment—to assemble the genome of the uncultured anammox bacterium Kuenenia stuttgartiensis from a complex bioreactor community, and identifies candidate genes responsible for ladderane biosynthesis and biological hydrazine metabolism.
daime, a novel image analysis program for microbial ecology and biofilm research.
Combinations of microscopy and molecular techniques to detect, identify and characterize microorganisms in environmental and medical samples are widely used in microbial ecology and biofilm research.
Kinetic analysis of a complete nitrifier reveals an oligotrophic lifestyle
TLDR
A pure culture of a comammox bacterium is isolated and it is shown that it is adapted to slow growth in oligotrophic and dynamic habitats on the basis of a high affinity for ammonia, low maximum rate of ammonia oxidation, high growth yield compared to canonical nitrifiers, and genomic potential for alternative metabolisms.
Cohn’s Crenothrix is a filamentous methane oxidizer with an unusual methane monooxygenase
TLDR
It is found that C. polyspora is a gammaproteobacterium closely related to methanotrophs and capable of oxidizing methane and encodes a phylogenetically very unusual particulate methane monooxygenase whose expression is strongly increased in the presence of methane.
Microbial community composition and function in wastewater treatment plants
TLDR
An overview of what is currently known about the identity and physiology of some of the microbial key players in activated sludge and biofilm systems is provided.
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