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DOI: 10.5445/IR/1000082335
Veröffentlicht am 23.04.2018

Investigation of different nitrogen reduction routes and their key microbial players in wood chip-driven denitrification beds

Grießmeier, Victoria; Bremges, Andreas; McHardy, Alice C.; Gescher, Johannes

Field denitrification beds containing polymeric plant material are increasingly used to eliminate nitrate from agricultural drainage water. They mirror a number of anoxic ecosystems. However, knowledge of the microbial composition, the interaction of microbial species, and the carbon degradation processes within these denitrification systems is sparse. This study revealed several new aspects of the carbon and nitrogen cycle, and these findings can be correlated with the dynamics of the microbial community composition and the activity of key species. Members of the order Pseudomonadales seem to be important players in denitrification at low nitrate concentrations, while a switch to higher nitrate concentrations seems to select for members of the orders Rhodocyclales and Rhizobiales. We observed that high nitrate loading rates lead to an unpredictable transition of the community’s activity from denitrification to dissimilatory reduction of nitrate to ammonium (DNRA). This transition is mirrored by an increase in transcripts of the nitrite reductase gene nrfAH and the increase correlates with the activity of members of the order Ignavi ... mehr

Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Angewandte Biowissenschaften (IAB)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 2045-2322
URN: urn:nbn:de:swb:90-823355
KITopen ID: 1000082335
HGF-Programm 47.02.01; LK 01
Erschienen in Scientific reports
Band 7
Heft 1
Seiten Article: 17028
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 05.12.2017
Schlagworte Microbial ecology; Water microbiology
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