Anaerobic ammonium oxidation by nitrite (anammox): Implications for N-2 production in coastal marine sediments

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Fältnamn	Indikatorer	Metadata
000		03431naa a2200469 4500
001		oai:gup.ub.gu.se/56917
003		SwePub
008		240528s2005 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
009		oai:research.chalmers.se:c22c37cc-0f26-4c58-817a-85460cb745ec
024	7	a https://gup.ub.gu.se/publication/569172 URI
024	7	a https://doi.org/10.1016/j.gca.2004.09.0322 DOI
024	7	a https://research.chalmers.se/publication/569172 URI
040		a (SwePub)gud (SwePub)cth
041		a eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Engström, Pia,d 1970u Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg4 aut0 (Swepub:cth)piaeng
245	1 0	a Anaerobic ammonium oxidation by nitrite (anammox): Implications for N-2 production in coastal marine sediments
264	1	b Elsevier BV,c 2005
520		a The respiratory reduction of nitrate (denitrification) is acknowledged as the most important process that converts biologically available nitrogen to gaseous dinitrogen (N-2) in marine ecosystems. Recent findings, however, indicate that anaerobic ammonium oxidation by nitrite (anammox) may be an important pathway for N-2 formation and N removal in coastal marine sediments and in anoxic water columns of the oceans. In the present study, we explored this novel mechanism during N mineralization by 15 N amendments (single and coupled additions of (NH4+)-N-15, (NO3-)-N-14 and (NO3-)-N-15) to surface sediments with a wide range of characteristics and overall reactivity. Patterns of N-29/30(2) production in the pore water during closed sediment incubations demonstrated anammox at all 7 of the investigated sites. Stoichiometric calculations revealed that 4% to 79% of total N-2 production was due to this novel route. The relative importance of anammox for N2 release was inversely correlated with remineralized solute production, benthic O-2 consumption, and surface sediment Ch1 a. The observed correlations indicate competition between reductants for pore water nitrite during early diagenesis and that additional factors (e.g. availability of Mn-oxides), superimposed on overall patterns of diagenetic activity, are important for determining absolute and relative rates of anammox in coastal marine sediments. Copyright (c) 2005 Elsevier Ltd
650	7	a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng
653		a EARLY DIAGENETIC PROCESSES
653		a ORGANIC-CARBON OXIDATION
653		a FIXED NITROGEN
653		a FRESH-WATER
653		a DENITRIFICATION
653		a SEA
653		a MANGANESE
653		a MODEL
653		a ATLANTIC
653		a OCEAN
653		a FRESH-WATER
700	1	a Dalsgaard, T4 aut
700	1	a Hulth, Stefan,d 1965u Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg4 aut0 (Swepub:gu)xhulst
700	1	a Aller, R. C4 aut
710	2	a Göteborgs universitetb Institutionen för kemi4 org
773	0	t Geochimica Et Cosmochimica Actad : Elsevier BVg 69:8, s. 2057-2065q 69:8<2057-2065x 0016-7037
856	4 8	u https://gup.ub.gu.se/publication/56917
856	4 8	u https://doi.org/10.1016/j.gca.2004.09.032
856	4 8	u https://research.chalmers.se/publication/56917

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Av författaren/redakt...: Engström, Pia, 1 ...; Dalsgaard, T; Hulth, Stefan, 1 ...; Aller, R. C

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