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Meta-analysis reveals ammonia-oxidizing bacteria respond more strongly to nitrogen addition than ammonia-oxidizing archaea

Meta-analysis reveals ammonia-oxidizing bacteria respond more strongly to nitrogen addition than ammonia-oxidizing archaea

Authors :
Stephen C. Hart
Nicholas C. Dove
J. Michael Beman
Emma L. Aronson
Chelsea J. Carey
Source :
Soil Biology and Biochemistry. 99:158-166
Publication Year :
2016
Publisher :
Elsevier BV, 2016.

Abstract

Shifts in microbial communities driven by anthropogenic nitrogen (N) addition have broad-scale ecological consequences. However, responses of microbial groups to exogenous N supply vary considerably across studies, hindering efforts to predict community changes. We used meta-analytical techniques to explore how amoA gene abundances of ammonia-oxidizing archaea (AOA) and bacteria (AOB) respond to N addition, and found that N addition increased AOA and AOB abundances by an average of 27% and 326%, respectively. Responses of AOB varied by study type, ecosystem, fertilizer type, and soil pH, and were strongest in unmanaged wildland soils and soils fertilized with inorganic N sources. Increases in nitrification potential with N addition significantly correlated with only AOB. Our analyses suggest that elevated N supply enhances soil nitrification potential by increasing AOB populations, and that this effect may be most pronounced in unmanaged wildland soils.

Details

ISSN :
00380717
Volume :
99
Database :
OpenAIRE
Journal :
Soil Biology and Biochemistry
Accession number :
edsair.doi...........00566346c08cdfd658029ae026ac31c5
Full Text :
https://doi.org/10.1016/j.soilbio.2016.05.014