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Applied and Environmental Microbiology logoLink to Applied and Environmental Microbiology
. 1978 Feb;35(2):301–305. doi: 10.1128/aem.35.2.301-305.1978

Capacity for Denitrification and Reduction of Nitrate to Ammonia in a Coastal Marine Sediment

Jan Sørensen 1
PMCID: PMC242830  PMID: 16345269

Abstract

The capacity for dissimilatory reduction of NO3 to N2 (N2O) and NH4+ was measured in 15NO3-amended marine sediment. Incubation with acetylene (7 × 10−3 atmospheres [normal]) caused accumulation of N2O in the sediment. The rate of N2O production equaled the rate of N2 production in samples without acetylene. Complete inhibition of the reduction of N2O to N2 suggests that the “acetylene blockage technique” is applicable to assays for denitrification in marine sediments. The capacity for reduction of NO3 by denitrification decreased rapidly with depth in the sediment, whereas the capacity for reduction of NO3 to NH4+ was significant also in deeper layers. The data suggested that the latter process may be equally as significant as denitrification in the turnover of NO3 in marine sediments.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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