Ammonia oxidising archaea are among the most abundant living organisms on Earth and
key microbial players in the global nitrogen cycle. They carry out oxidation of ammonia to …

Highlights•Nitrification causes nitrogen losses with impact on crop yield and
environment.•Newly discovered microbes can be important for nitrification in agricultural …

Nitrification, the oxidation of ammonia to nitrate, is an essential process in the
biogeochemical nitrogen cycle. The first step of nitrification, ammonia oxidation, is performed …

Nitrogen fertilisation of agricultural soil contributes significantly to emissions of the potent
greenhouse gas nitrous oxide (N2O), which is generated during denitrification and, in oxic …

The recent discovery of complete ammonia oxidizers (comammox Nitrospira) challenged the
paradigm of the two-step nitrification mediated by two distinct groups of nitrifiers, and raised …

In the majority of agricultural soils, ammonium (NH 4+) is rapidly converted to nitrate (NO 3−)
in the biological ammonia and nitrite oxidation processes known as nitrification. The often …

Nitrification is the microbial conversion of reduced forms of nitrogen (N) to nitrate (NO3−),
and in fertilized soils it can lead to substantial N losses via NO3− leaching or nitrous oxide …

Nitrification is a key microbial process in the nitrogen (N) cycle that converts ammonia to
nitrate. Excessive nitrification, typically occurring in agroecosystems, has negative …

Four mesophilic, neutrophilic, and aerobic marine ammonia-oxidizing archaea, designated
strains SCM1T, HCA1T, HCE1T and PS0T, were isolated from a tropical marine fish tank …

Soil ammonia-oxidizing bacteria and archaea (AOB and AOA) convert ammonium/ammonia
to nitrite in the process of nitrification. However, the potentially differential responses of these …