Articles | Volume 16, issue 23
https://doi.org/10.5194/bg-16-4705-2019
https://doi.org/10.5194/bg-16-4705-2019
Research article
 | 
10 Dec 2019
Research article |  | 10 Dec 2019

Direct O2 control on the partitioning between denitrification and dissimilatory nitrate reduction to ammonium in lake sediments

Adeline N. Y. Cojean, Jakob Zopfi, Alan Gerster, Claudia Frey, Fabio Lepori, and Moritz F. Lehmann

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Cited articles

An, S. and Gardner, W. S.: Dissimilatory nitrate reduction to ammonium (DNRA) as a nitrogen link, versus denitrification as a sink in a shallow estuary (Laguna Madre/Baffin Bay, Texas), Mar. Ecol. Prog. Ser., 237, 41–50, https://doi.org/10.3354/meps237041, 2002. 
Babbin, A. R., Keil, R. G., Devol, A. H., and Ward, B. B.: Organic matter stoichiometry, flux, and oxygen control nitrogen loss in the ocean, Science, 344, 406–408, https://doi.org/10.1126/science.1248364, 2014. 
Bateman, E. J. and Baggs, E. M.: Contributions of nitrification and denitrification to N2O emissions from soils at different water-filled pore space, Biol. Fertil. Soils, 41, 379–388, https://doi.org/10.1007/s00374-005-0858-3, 2005. 
Baumann, B., Snozzi, M., Zehnder, A. J. B., and van der Meer, J. R.: Dynamics of denitrification activity of Paracoccus denitrificans in continuous culture during aerobic-anaerobic changes, J. Bacteriol., 178, 4367–4374, https://doi.org/10.1128/jb.178.15.4367-4374.1996, 1996. 
Baumann, B., Snozzi, M., van der Meer, J. R., and Zehnder, A. J. B.: Development of stable denitrifying cultures during repeated aerobic-anaerobic transient periods, Water Res., 31, 1947–1954, https://doi.org/10.1016/S0043-1354(97)00053-5, 1997. 
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Short summary
Our results demonstrate the importance of oxygen in regulating the fate of nitrogen (N) in the sediments of Lake Lugano south basin, Switzerland. Hence, our study suggests that, by changing oxygen concentration in bottom waters, the seasonal water column turnover may significantly regulate the partitioning between N removal and N recycling in surface sediments, and it is likely that a similar pattern can be expected in a wide range of environments.
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