Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 99, Issue -, Pages 158-166Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2016.05.014
Keywords
amoA; Fertilization; Microbial community; Nitrogen deposition; Nitrification potential; Thaumarchaeota
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Funding
- USDA NIFA [CA-R-PPA-5101-CG]
- National Science Foundation [ICER-1541047, EF-1550920]
- National Science Foundation through the Southern Sierra Critical Zone Observatory [EAR-0725097, 1239521, 1331939]
- Direct For Biological Sciences [1550920] Funding Source: National Science Foundation
- Division Of Environmental Biology [1550920] Funding Source: National Science Foundation
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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. (C) 2016 Elsevier Ltd. All rights reserved.
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