Articles | Volume 14, issue 18
https://doi.org/10.5194/bg-14-4061-2017
https://doi.org/10.5194/bg-14-4061-2017
Research article
 | 
19 Sep 2017
Research article |  | 19 Sep 2017

Does denitrification occur within porous carbonate sand grains?

Perran Louis Miall Cook, Adam John Kessler, and Bradley David Eyre

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Cited articles

Bourke, M. F., Marriott, P. J., Glud, R. N., Hassler-Sheetal, H., Kamalanathang, M., Beardall, J., Greening, C., and Cook, P. L. M.: Metabolism in anoxic permeable sediments is dominated by eukaryotic dark fermentation, Nat. Geosci., 10, 30–35, 2017.
Cook, P. L. M., Wenzhöfer, F., Rysgaard, S., Galaktionov, O. S., Meysman, F. J. R., Eyre, B. D., Cornwell, J. C., Huettel, M., and Glud, R. N.: Quantification of denitrification in permeable sediments: insights from a two dimensional simulation analysis and experimental data, Limnol. Oceanogr.-Meth., 4, 294–307, 2006.
Cook, P. L. M., Wenzhöfer, F., Glud, R. N., Janssen, F., and Huettel, M.: Benthic solute exchange and carbon mineralisation in two subtidal sandy sediments: effect of flow, Limnol. Oceanogr., 52, 1943–1963, 2007.
Dalsgaard, T., Stewart, F. J., Thamdrup, B., De Brabandere, L., Revsbech, N. P., Ulloa, O., Canfield, D. E., and DeLong, E. F.: Oxygen at nanomolar levels reversibly suppresses process rates and gene expression in anammox and denitrification in the oxygen minimum zone off Northern Chile, mBio, 5, 01966–01914, 2014.
De'ath, G., Fabricius, K. E., Sweatman, H., and Puotinen, M.: The 27-year decline of coral cover on the Great Barrier Reef and its causes, P. Natl. Acad. Sci. USA, 109, 17995–17999, 2012.
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Short summary
Nitrogen is the key nutrient that typically limits productivity in coastal waters. One of the key controls on the amount of bioavailable nitrogen is the process of denitrification, which converts nitrate (bioavailable) into nitrogen gas. Previous studies suggest high rates of denitrification may take place within carbonate sediments, and one explanation for this is that this process may take place within the sand grains. Here we show evidence to support this hypothesis.
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