Results 101 to 110 of about 591 (127)

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

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

Variability of the transporter gene complement in ammonia-oxidizing archaea

Trends in Microbiology, 2014
Ammonia-oxidizing archaea (AOA) are a widespread and abundant component of microbial communities in many different ecosystems. The extent of physiological differences between individual AOA is, however, unknown. Here, we compare the transporter gene complements of six AOA, from four different environments and two major clades, to assess their potential
Offre P, Kerou M, Spang A, Schleper C
openaire   +3 more sources

Ammonia-oxidizing bacteria and archaea in sediments of the Gulf of Mexico

Environmental Technology, 2014
The diversity (richness and community composition) of ammonia-oxidizing archaea (AOA) and bacteria (AOB) within sediments of the Gulf of Mexico was examined. Using polymerase chain reaction primers designed to specifically target the archaeal ammonia monooxygenase-subunit (amoA) gene and bacterial amoA gene, we found AOA and AOB to be present in all ...
Flood, M, Frabutt, D, Floyd, D, Powers, A, Ezegwe, U, Devol, A, Tiquia-Arashiro, SM   +6 more
openaire   +3 more sources

Diversity and mode of transmission of ammonia‐oxidizing archaea in marine sponges

Environmental Microbiology, 2008
Summary The model marine crenarchaeote ‘ Cenarchaeum symbiosum ’ is until now the only ammonia‐oxidizing archaeon known from a marine sponge. Here, phylogenetic analyses based on the 16S rRNA and ammonia monooxygenase subunit A ( amoA )
Steger, Doris, Ettinger-Epstein, Piers, Whalan, Stephen, Hentschel, Ute, de Nys, Rocky, Wagner, Michael, Taylor, Michael W.   +6 more
openaire   +4 more sources

Homologues of nitrite reductases in ammonia‐oxidizing archaea: diversity and genomic context

Environmental Microbiology, 2010
Summary Ammonia‐oxidizing archaea are frequent and ubiquitous inhabitants of terrestrial and marine environments. As they have only recently been detected, most aspects of their metabolism are yet unknown.
Bartossek, Rita, Nicol, Graeme W, Lanzen, Anders, Klenk, Hans-Peter, Schleper, Christa   +4 more
openaire   +2 more sources

Ammonia-oxidizing Archaea in Kamchatka Hot Springs

Geomicrobiology Journal, 2011
Mounting evidence suggests that ammonia-oxidizing archaea (AOA) may play important roles in nitrogen cycling in geothermal environments. In this study, the diversity, distribution and ecological significance of AOA in terrestrial hot springs in Kamchatka (Far East Russia) were explored using amoA genes complemented by analysis of glycerol dialkyl ...
Weidong Zhao, Zhaoqi Song, Hongcheng Jiang, Wenjun Li, Xiaozhen Mou, Christopher S. Romanek, Juergen Wiegel, Hailiang Dong, Chuanlun L. Zhang   +8 more
openaire   +1 more source

A Critical Review on Nitrous Oxide Production by Ammonia-Oxidizing Archaea

Environmental Science & Technology, 2020
The continuous increase of nitrous oxide (N2O) in the atmosphere has become a global concern because of its property as a potent greenhouse gas. Given the important role of ammonia-oxidizing archaea (AOA) in ammonia oxidation and their involvement in N2O production, a clear understanding of the knowledge on archaeal N2O production is necessary for ...
Lan Wu, Xueming Chen, Wei Wei, Yiwen Liu, Dongbo Wang, Bing-Jie Ni   +5 more
openaire   +2 more sources

Competition between ammonia-oxidizing archaea and complete ammonia oxidizers from freshwater environments

Applied and Environmental Microbiology
Nitrification is a key process in the global nitrogen cycle. Aerobic ammonia oxidizers play a central role in the nitrogen cycle by performing the first step of nitrification. Ammonia-oxidizing archaea (AOA) and complete ammonia oxidizers (comammox) are the dominant nitrifiers in environments with low ammonium availability.
Sabita Ghimire-Kafle, Matt E. Weaver, Madisen P. Kimbrel, Annette Bollmann   +3 more
openaire   +2 more sources

Diversity and Abundance of Ammonia-Oxidizing Bacteria and Ammonia-Oxidizing Archaea During Cattle Manure Composting

Microbial Ecology, 2010
Ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) play important roles in nitrification in various environments. They may also be key communities for ammonia oxidation in composting systems, although few studies have discussed their presence. We investigated the relative diversity and abundance of AOB and AOA using cloning procedures,
Nozomi, Yamamoto, Kenichi, Otawa, Yutaka, Nakai   +2 more
openaire   +2 more sources