Articles | Volume 17, issue 4
Research article
24 Feb 2020
Research article |  | 24 Feb 2020

Isotopic evidence for alteration of nitrous oxide emissions and producing pathways' contribution under nitrifying conditions

Guillaume Humbert, Mathieu Sébilo, Justine Fiat, Longqi Lang, Ahlem Filali, Véronique Vaury, Mathieu Spérandio, and Anniet M. Laverman

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Cited articles

Andersson, K. K. and Hooper, A. B.: O2 and H2O are each the source of one O in NO2- produced from NH3 by Nitrosomonas: 15N-NMR evidence, FEBS Lett., 164, 236–240,, 1983. 
Betlach, M. R. and Tiedje, J. M.: Kinetic explanation for accumulation of nitrite, nitric oxide, and nitrous oxide during bacterial denitrification, Appl. Environ. Microb., 42, 1074–1084, 1981. 
Bollon, J., Filali, A., Fayolle, Y., Guerin, S., Rocher, V., and Gillot, S.: N2O emissions from full-scale nitrifying biofilters, Water Res., 102, 41–51,, 2016. 
Bothe, H., Ferguson, S. J., and Newton, W. E.: Biology of the nitrogen cycle,, Elsevier, Amsterdam, the Netherlands, 2007. 
Caranto, J. D., Vilbert, A. C., and Lancaster, K. M.: Nitrosomonas europaea cytochrome P460 is a direct link between nitrification and nitrous oxide emission, P. Natl. Acad. Sci. USA, 113, 14704–14709,, 2016. 
Short summary
Mitigating emissions of the greenhouse gas N2O requires understanding of the relative contribution of its producing processes in response to environmental variables. We show, using isotopic analysis, that N2O emissions from a nitrifying system were sensitive to oxygenation, temperature and NH4+ concentrations with nitrite reduction being the main N2O source. Temperature appears to be the main control on N2O production, due to its dissimilar effects on ammonium and nitrite oxidizing activities.
Final-revised paper