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Applied and Environmental Microbiology, February 2005, p. 1105-1108, Vol. 71, No. 2
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.2.1105-1108.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Emergence of Competitive Dominant Ammonia-Oxidizing Bacterial Populations in a Full-Scale Industrial Wastewater Treatment Plant

Alice C. Layton,1,2 Hebe Dionisi,2,{dagger} H.-W. Kuo,2,3 Kevin G. Robinson,3 Victoria M. Garrett,2 Arthur Meyers,2,4 and Gary S. Sayler1,2*

Department of Microbiology,1 Department of Civil and Environmental Engineering,3 Center of Environmental Biotechnology, The University of Tennessee, Knoxville,2 Eastman Chemical Company, Kingsport, Tennessee4

Received 11 June 2004/ Accepted 20 September 2004

ABSTRACT

Ammonia-oxidizing bacterial populations in an industrial wastewater treatment plant were investigated with amoA and 16S rRNA gene real-time PCR assays. Nitrosomonas nitrosa initially dominated, but over time RI-27-type ammonia oxidizers, also within the Nitrosomonas communis lineage, increased from below detection to codominance. This shift occurred even though nitrification remained constant.

* Corresponding author. Mailing address: Department of Microbiology, Center of Environmental Biotechnology, The University of Tennessee, Knoxville, TN 37996. Phone: (865) 974-8080. Fax: (865) 974-8086. E-mail: alayton{at}utk.edu.

FOOTNOTES

{dagger} Present address: CENPAT-CONICET, Puerto Madryn, Chubut, Argentina.

Applied and Environmental Microbiology, February 2005, p. 1105-1108, Vol. 71, No. 2
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.2.1105-1108.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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