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Nitrogen removal in...
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Hulth, Stefan,1965Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg
(författare)
Nitrogen removal in marine environments: recent findings and future research challenges
- Artikel/kapitelEngelska2005
Förlag, utgivningsår, omfång ...
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LIBRIS-ID:oai:gup.ub.gu.se/56914
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https://gup.ub.gu.se/publication/56914URI
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https://doi.org/10.1016/j.marchem.2004.07.013DOI
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https://research.chalmers.se/publication/56914URI
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Ämneskategori:art swepub-publicationtype
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Respiratory reduction of nitrate (denitrification) is recognized as the most important process converting biologically available (fixed) nitrogen to N-2. In current N cycle models, a major proportion of global marine denitrification (50-70%) is assumed to take place on the sea floor, particularly in organic rich continental margin sediments. Recent observations indicate that present conceptual views of denitrification and pathways of nitrate reduction and N, formation are incomplete. Alternative N cycle pathways, particularly in sediments. include anaerobic ammonium oxidation to nitrite, nitrate and N-2 by Mn-oxides, and anaerobic ammonium oxidation coupled to nitrite reduction and subsequent N, mobilization. The discovery of new links and feedback mechanisms between the redox cycles of, e.g., C, N, S, Mn and Fe casts doubt on the present general understanding of the global N cycle. Recent models of the oceanic N budget indicate that total inputs are significantly smaller than estimated fixed N removal. The occurrence of alternative N reaction pathways further exacerbates the apparent imbalance as they introduce additional routes of N removal. In this contribution, we give a brief historical background of the conceptual understanding of N cycling in marine ecosystems, emphasizing pathways of aerobic and anaerobic N mineralization in marine sediments, and the implications of recently recognized metabolic pathways for N removal in marine environments. (c) 2004 Elsevier B.V. All rights reserved.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Aller, R. C
(författare)
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Canfield, D. E
(författare)
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Dalsgaard, T
(författare)
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Engström, Pia,1970Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg(Swepub:cth)piaeng
(författare)
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Gilbert, F.
(författare)
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Sundbäck, Kristina,1949Gothenburg University,Göteborgs universitet,Institutionen för marin ekologi,Department of Marine Ecology,University of Gothenburg(Swepub:gu)xsukri
(författare)
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Thamdrup, B
(författare)
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Göteborgs universitetInstitutionen för kemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Marine Chemistry: Elsevier BV94:1-4, s. 125-1450304-4203
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Hulth, Stefan, 1 ...
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Aller, R. C
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Canfield, D. E
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Dalsgaard, T
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Engström, Pia, 1 ...
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Gilbert, F.
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visa fler...
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Sundbäck, Kristi ...
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Thamdrup, B
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Ekologi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
- Artiklar i publikationen
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Marine Chemistry
- Av lärosätet
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Göteborgs universitet
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Chalmers tekniska högskola