Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso


  • Felipe Gomez
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1059-2


Nitrification is an oxidative biological process that converts ammonia into nitrate. The whole process is composed of two different steps which are performed by different microorganisms: ammonia to nitrite and nitrite to nitrate. The first step is performed by organisms of two domains: Bacteria (genera Nitrosomonas and Nitrosococcus) and Archaea (Crenarchaeota phylum). The second step is driven by Bacteria (gen. Nitrobacter). Nitrification is an important part of the nitrogen cycle.

See Also


Biological Process Bioorganic Chemistry Nitrogen Cycle Crenarchaeota Phylum 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Centro de Astrobiología (CSIC/INTA)Instituto Nacional de Técnica AeroespacialTorrejón de ArdozSpain