Results 171 to 180 of about 8,377 (202)

Shifts between ammonia-oxidizing bacteria and archaea in relation to nitrification potential across trophic gradients in two large Chinese lakes (Lake Taihu and Lake Chaohu)

Water Research, 2013
Ammonia oxidation plays a pivotal role in the cycling and removal of nitrogen in aquatic ecosystems. Recent findings have expanded the known ammonia-oxidizing prokaryotes from Bacteria to Archaea.
Chunlei Song, Xiuyun Cao, Yiyong Zhou
exaly   +2 more sources

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Ammonia-oxidizing archaea involved in nitrogen removal

Water Research, 2009
Ammonia oxidation is critical to global nitrogen cycling and is often thought to be driven only by ammonia-oxidizing bacteria. The recent finding of new ammonia-oxidizing organisms belonging to the archaeal domain challenges this perception. Two major microbial groups are now believed to be involved in ammonia oxidation: chemolithotrophic ammonia ...
Zhiqiang Hu
exaly   +3 more sources

Ammonia-oxidizing archaea in biological interactions

Journal of Microbiology, 2021
The third domain Archaea was known to thrive in extreme or anoxic environments based on cultivation studies. Recent metagenomics-based approaches revealed a widespread abundance of archaea, including ammonia-oxidizing archaea (AOA) of Thaumarchaeota in non-extreme and oxic environments.
Jong-Geol, Kim, Khaled S, Gazi, Samuel Imisi, Awala, Man-Young, Jung, Sung-Keun, Rhee   +4 more
openaire   +2 more sources

Active ammonia-oxidizing bacteria and archaea in wastewater treatment systems

Journal of Environmental Sciences, 2021
Ammonia-oxidizing bacteria (AOB) and archaea (AOA) are two microbial groups mediating nitrification, yet little is presently known about their abundances and community structures at the transcriptional level in wastewater treatment systems (WWTSs).
MAOSHENG Zheng, Shishi He, Yong-Xin Liu   +2 more
exaly   +3 more sources

Physiology and Diversity of Ammonia-Oxidizing Archaea

Annual Review of Microbiology, 2012
The discovery of ammonia-oxidizing archaea (AOA), now generally recognized to exert primary control over ammonia oxidation in terrestrial, marine, and geothermal habitats, necessitates a reassessment of the nitrogen cycle. In particular, the unusually high affinity of marine and terrestrial AOA for ammonia indicates that this group may determine the ...
David A, Stahl, José R, de la Torre
openaire   +2 more sources

Contribution of ammonia-oxidizing archaea and ammonia-oxidizing bacteria to ammonia oxidation in two nitrifying reactors

Environmental Science and Pollution Research, 2018
In this study, two laboratory nitrifying reactors (NRI and NRII), which were seeded by sludge from different sources and operated under different operating conditions, were found to possess distinct dominant ammonia-oxidizing microorganisms. Ammonia-oxidizing archaeal (AOA) amoA genes outnumbered ammonia-oxidizing bacterial (AOB) amoA genes in reactor ...
Papitchaya, Srithep, Preeyaporn, Pornkulwat, Tawan, Limpiyakorn   +2 more
openaire   +2 more sources

pH as a Driver for Ammonia-Oxidizing Archaea in Forest Soils

Microbial Ecology, 2014
In this study, we investigated the impact of soil pH on the diversity and abundance of archaeal ammonia oxidizers in 27 different forest soils across Germany. DNA was extracted from topsoil samples, the amoA gene, encoding ammonia monooxygenase, was amplified; and the amplicons were sequenced using a 454-based pyrosequencing approach.
Stempfhuber, Barbara, Engel, Marion, Fischer, Doreen, Neskovic-Prit, Ganna, Wubet, Tesfaye, Schöning, Ingo, Gubry-Rangin, Cécile, Kublik, Susanne, Schloter-Hai, Brigitte, Rattei, Thomas, Welzl, Gerhard, Nicol, Graeme W., Schrumpf, Marion, Buscot, Francois, Prosser, James, Schloter, Michael   +15 more
openaire   +7 more sources

Archaea predominate among ammonia-oxidizing prokaryotes in soils

Nature, 2006
Ammonia oxidation is the first step in nitrification, a key process in the global nitrogen cycle that results in the formation of nitrate through microbial activity. The increase in nitrate availability in soils is important for plant nutrition, but it also has considerable impact on groundwater pollution owing to leaching.
S, Leininger, T, Urich, M, Schloter, L, Schwark, J, Qi, G W, Nicol, J I, Prosser, S C, Schuster, C, Schleper   +8 more
openaire   +2 more sources

Physiology and Genomics of Ammonia-Oxidizing Archaea

2011
This chapter is divided into two major sections: a brief comparative description of the physiology of ammonia-oxidizing archaea (AOA) in relation to the better-characterized ammonia-oxidizing bacteria (AOB); and a discussion of features that have been gleaned from the genome sequence and its relevance to environmental genomic studies.
Hidetoshi Urakawa, Willm Martens-Habbena, David A. Stahl   +2 more
openaire   +1 more source

Nitrogen Metabolism and Kinetics of Ammonia-Oxidizing Archaea

2011
The discovery of ammonia-oxidizing mesophilic and thermophilic Group I archaea changed the century-old paradigm that aerobic ammonia oxidation is solely mediated by two small clades of Beta- and Gammaproteobacteria. Group I archaea are extremely diverse and ubiquitous in marine and terrestrial environments, accounting for 20-30% of the microbial ...
Willm, Martens-Habbena, David A, Stahl
openaire   +2 more sources