Articles | Volume 14, issue 2
Biogeosciences, 14, 285–300, 2017
https://doi.org/10.5194/bg-14-285-2017
Biogeosciences, 14, 285–300, 2017
https://doi.org/10.5194/bg-14-285-2017
Research article
19 Jan 2017
Research article | 19 Jan 2017

The fate of fixed nitrogen in marine sediments with low organic loading: an in situ study

Stefano Bonaglia et al.

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Short summary
Understanding nitrogen (N) cycling mechanisms in the ocean is crucial for improving ecosystem management. Here we study N processes by in situ lander and isotope tracer techniques in – so far overlooked – sediments with low organic loads. Denitrification and anammox are the main N transformation processes. However, we demonstrate high contribution of dissimilatory nitrate reduction to ammonium, which recycles a major portion of fixed N to the water column and sustains primary production.
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