Results 51 to 60 of about 6,916 (190)

Gene duplication drives genome expansion in Thaumarchaeota [PDF]

open access: yes, 2020
Abstract Ammonia-oxidising archaea of the phylum Thaumarchaeota are keystone species in global nitrogen cycling. However, only three of the six known families of the terrestrially ubiquitous order Nitrososphaerales possess representative genomes.
Sheridan, Paul O.   +4 more
openaire   +1 more source

Heterotrophic Thaumarchaeota with ultrasmall genomes are widespread in the ocean [PDF]

open access: yes, 2020
Abstract The Thaumarchaeota comprise a diverse archaeal phylum including numerous lineages that play key roles in global biogeochemical cycling, particularly in the ocean. To date, all genomically-characterized marine Thaumarchaeota are reported to be chemolithoautotrophic ammonia-oxidizers.
Aylward, Frank O., Santoro, Alyson E.
openaire   +1 more source

Phylogenomics suggests oxygen availability as a driving force in Thaumarchaeota evolution [PDF]

open access: yesThe ISME Journal, 2019
Abstract Ammonia-oxidizing archaea (AOA) of the phylum Thaumarchaeota are widespread in marine and terrestrial habitats, playing a major role in the global nitrogen cycle. However, their evolutionary history remains unexplored, which limits our understanding of their adaptation mechanisms.
Minglei Ren   +13 more
openaire   +4 more sources

Biogeography of soil Thaumarchaeota in relation to soil depth and land usage [PDF]

open access: yesFEMS Microbiology Ecology, 2016
Although Thaumarchaeota are important contributors to ammonia oxidation in terrestrial habitats, distributions of ammonia oxidizers along soil depth profiles are poorly understood, especially in relation to distinct land usages. Leveraging the close proximity of forest, field and agricultural plots at the RARE: Charitable Research Reserve, we examined ...
Xinda, Lu   +2 more
openaire   +2 more sources

Thaumarchaeal ammonium oxidation and evidence for a nitrogen cycle in a subsurface radioactive thermal spring in the Austrian Central Alps

open access: yesFrontiers in Microbiology, 2014
Previous studies had suggested the presence of ammonium oxidizing Thaumarchaeota as well as nitrite oxidizing Bacteria in the subsurface spring called Franz Josef Quelle (FJQ), a slightly radioactive thermal mineral spring with a temperature of 43.6 ...
Friedrich Wolfgang Gerbl   +4 more
doaj   +1 more source

A Novel Approach to Characterize the Lipidome of Marine Archaeon Nitrosopumilus maritimus by Ion Mobility Mass Spectrometry

open access: yesFrontiers in Microbiology, 2021
Archaea are differentiated from the other two domains of life by their biomolecular characteristics. One such characteristic is the unique structure and composition of their lipids.
Kai P. Law   +9 more
doaj   +1 more source

Ammonia Oxidation in the Ocean can be Inhibited by Nanomolar Concentrations of Hydrogen Peroxide

open access: yesFrontiers in Marine Science, 2016
Marine Thaumarchaeota were discovered over 20 years ago and although a few isolates from this group are now available for study, we do not yet understand the environmental controls on their growth and distribution.
Bradley B Tolar   +8 more
doaj   +1 more source

Cultivation and Genomic Analysis of “Candidatus Nitrosocaldus islandicus,” an Obligately Thermophilic, Ammonia-Oxidizing Thaumarchaeon from a Hot Spring Biofilm in Graendalur Valley, Iceland

open access: yesFrontiers in Microbiology, 2018
Ammonia-oxidizing archaea (AOA) within the phylum Thaumarchaeota are the only known aerobic ammonia oxidizers in geothermal environments. Although molecular data indicate the presence of phylogenetically diverse AOA from the Nitrosocaldus clade, group 1 ...
Anne Daebeler   +9 more
doaj   +1 more source

Meta-omic signatures of microbial metal and nitrogen cycling in marine oxygen minimum zones

open access: yesFrontiers in Microbiology, 2015
Iron (Fe) and copper (Cu) are essential cofactors for microbial metalloenzymes, but little is known about the metalloenyzme inventory of anaerobic marine microbial communities despite their importance to the nitrogen cycle. We compared dissolved O2, NO3-,
Jennifer B. Glass   +12 more
doaj   +1 more source

Different behaviour of methanogenic archaea andThaumarchaeotain rice field microcosms [PDF]

open access: yesFEMS Microbiology Ecology, 2013
Archaea in rice fields play an important role in carbon and nitrogen cycling. They comprise methane-producing Euryarchaeota as well as ammonia-oxidizing Thaumarchaeota, but their community structures and population dynamics have not yet been studied in the same system.
Ke, X., Lu, Y., Conrad, R.
openaire   +3 more sources

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