Anaerobic ammonium oxidation (anammox) in sediments of the Gulf of Finland

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http://hdl.handle.net/10138/29416

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Hietanen , S 2007 , ' Anaerobic ammonium oxidation (anammox) in sediments of the Gulf of Finland ' , Aquatic Microbial Ecology , vol. 48 , pp. 197-205 .

Title: Anaerobic ammonium oxidation (anammox) in sediments of the Gulf of Finland
Author: Hietanen, Susanna
Contributor: University of Helsinki, Aquatic Sciences
Date: 2007
Language: eng
Number of pages: 9
Belongs to series: Aquatic Microbial Ecology
ISSN: 0948-3055
URI: http://hdl.handle.net/10138/29416
Abstract: Anaerobic ammonium oxidation (anammox) and denitrification were measured in the open sea and coastal accumulation basins of the Gulf of Finland. The different methods used gave conflicting results on the importance of the anammox process in the sediments. Anammox generally contributed less than 20 % to the total N-2 production, and no anammox was found in a shallow inner estuary basin. However, the discovery of the anammox process in the open sea sediments challenges the denitrification measurements made in the area, as the coexistence of anammox and denitrification compromises the central assumptions behind the method used in denitrification measurements and causes overestimates of the N-2 production. The high (NO3-)-N-15 incubation concentration used in Baltic Sea denitrification measurements exacerbates this overestimation, which is likely to have been substantial.
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