Denitrifying bacterial communities display different temporal fluctuation patterns across Dutch agricultural soils
Nguyen E López-Lozano1,2, Michele C Pereira E Silva3,4, Franck Poly5
1Department of Microbial Ecology, Centre for Life Sciences, University of Groningen, P.O. BOX 11103, 9700CC, Groningen, The Netherlands.
Antonie Van Leeuwenhoek
|June 14, 2017
Summary
Denitrifying bacterial communities in agricultural soils show significant temporal changes. Soil texture, organic matter, and pH influence denitrifier abundance and activity, but predicting dynamics requires analyzing unique soil sites.
Area of Science:
- Environmental microbiology
- Soil science
- Agricultural ecology
Background:
- Denitrification is crucial for agricultural and environmental health.
- Understanding denitrifying bacterial communities is key to managing soil functions.
- Temporal and spatial factors significantly impact microbial processes in soils.
Purpose of the Study:
- To investigate temporal and spatial factors controlling denitrifying bacterial abundance and activity.
- To analyze the influence of soil parameters on denitrifier communities over two years.
- To improve the predictability of denitrifier dynamics in agricultural soils.
Main Methods:
- Quantified denitrifier gene abundance (nirS, nirK, nosZ) using qPCR.
- Estimated potential denitrification enzyme activity (DEA).
- Correlated microbial data with soil parameters (organic matter, pH, NO3-, texture).
Main Results:
- Significant temporal variations observed in nirK, nosZ, and nirS communities.
- Organic matter, pH, and nitrate influenced denitrifier gene abundances.
- Soil texture was the primary regulator of DEA, independent of denitrifier abundance.
Conclusions:
- Denitrifier abundance and activity are complexly regulated by multiple soil factors.
- General patterns may obscure important site-specific dynamics.
- Analyzing atypical sites is essential for predicting denitrifier behavior and soil functioning.
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