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Appl Environ Microbiol. 2011 Mar;77(5):1896-9. doi: 10.1128/AEM.02879-10. Epub 2011 Jan 14.

Ammonium availability affects the ratio of ammonia-oxidizing bacteria to ammonia-oxidizing archaea in simulated creek ecosystems.

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  • 1Institute of Ecology-Limnology/Aquatic Geomicrobiology, Friedrich Schiller University Jena, Dornburger Str. 159, D-07743 Jena, Germany.


The ammonia-oxidizing microbial community colonizing clay tiles in flow channels changed in favor of ammonia-oxidizing bacteria during a 12-week incubation period even at originally high ratios of ammonia-oxidizing archaea to ammonia-oxidizing bacteria (AOB). AOB predominance was established more rapidly in flow channels incubated at 350 μM NH(4)(+) than in those incubated at 50 or 20 μM NH(4)(+). Biofilm-associated potential nitrification activity was first detected after 28 days and was positively correlated with bacterial but not archaeal amoA gene copy numbers.

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