Zitieren Sie bitte immer diesen URN: urn:nbn:de:kobv:b43-463061
Metabolic specialization of denitrifiers in permeable sediments controls N2O emissions
- Coastal oceans receive large amounts of anthropogenic fixed nitrogen (N), most of which is denitrified in the sediment before reaching the open ocean. Sandy sediments, which are common in coastal regions, seem to play an important role in catalysing this N‐loss. Permeable sediments are characterized by advective porewater transport, which supplies high fluxes of organic matter into the sediment, but also leads to fluctuations in oxygen and nitrate concentrations. Little is known about how the denitrifying communities in these sediments are adapted to such fluctuations. Our combined results indicate that denitrification in eutrophied sandy sediments from the world's largest tidal flat system, the Wadden Sea, is carried out by different groups of microorganisms. This segregation leads to the formation of N2O which is advectively transported to the overlying waters and thereby emitted to the atmosphere. At the same time, the production of N2O within the sediment supports a subset ofCoastal oceans receive large amounts of anthropogenic fixed nitrogen (N), most of which is denitrified in the sediment before reaching the open ocean. Sandy sediments, which are common in coastal regions, seem to play an important role in catalysing this N‐loss. Permeable sediments are characterized by advective porewater transport, which supplies high fluxes of organic matter into the sediment, but also leads to fluctuations in oxygen and nitrate concentrations. Little is known about how the denitrifying communities in these sediments are adapted to such fluctuations. Our combined results indicate that denitrification in eutrophied sandy sediments from the world's largest tidal flat system, the Wadden Sea, is carried out by different groups of microorganisms. This segregation leads to the formation of N2O which is advectively transported to the overlying waters and thereby emitted to the atmosphere. At the same time, the production of N2O within the sediment supports a subset of Flavobacteriia which appear to be specialized on N2O reduction. If the mechanisms shown here are active in other coastal zones, then denitrification in eutrophied sandy sediments may substantially contribute to current marine N2O emissions.…
Autor*innen: | H. K. Marchant, H. E. Tegetmeyer, S. Ahmerkamp, M. Holtappels, G. Lavik, J. Graf, Frank SchreiberORCiD, M. Mussmann, M. Strous, M. M. M. Kuypers |
---|---|
Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Environmental Microbiology |
Jahr der Erstveröffentlichung: | 2018 |
Organisationseinheit der BAM: | 4 Material und Umwelt |
4 Material und Umwelt / 4.1 Biologische Materialschädigung und Referenzorganismen | |
Veröffentlichende Institution: | Bundesanstalt für Materialforschung und -prüfung (BAM) |
Verlag: | John Wiley & Sons Ltd |
Jahrgang/Band: | 20 |
Ausgabe/Heft: | 12 |
Erste Seite: | 4486 |
Letzte Seite: | 4502 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik |
Freie Schlagwörter: | Cross-feeding; Denitrification; Nitrous oxide |
Themenfelder/Aktivitätsfelder der BAM: | Umwelt |
Umwelt / Umwelt-Material-Interaktionen | |
DOI: | 10.1111/1462-2920.14385 |
URN: | urn:nbn:de:kobv:b43-463061 |
URL: | https://onlinelibrary.wiley.com/doi/full/10.1111/1462-2920.14385 |
ISSN: | 1462-2920 |
ISSN: | 1462-2912 |
Verfügbarkeit des Dokuments: | Datei für die Öffentlichkeit verfügbar ("Open Access") |
Lizenz (Deutsch): | Creative Commons - CC BY - Namensnennung 4.0 International |
Datum der Freischaltung: | 17.10.2018 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 02.01.2019 |
Schriftenreihen ohne Nummerierung: | Wissenschaftliche Artikel der BAM |