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Reichel, R.* ; Radl, V. ; Rosendahl, I.* ; Albert, A. ; Amelung, W.* ; Schloter, M. ; Thiele-Bruhn, S.*

Soil microbial community responses to antibiotic-contaminated manure under different soil moisture regimes.

Appl. Microbiol. Biotechnol. 89, 6487-6495 (2014)
Publ. Version/Full Text Volltext DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Sulfadiazine (SDZ) is an antibiotic frequently administered to livestock, and it alters microbial communities when entering soils with animal manure, but understanding the interactions of these effects to the prevailing climatic regime has eluded researchers. A climatic factor that strongly controls microbial activity is soil moisture. Here, we hypothesized that the effects of SDZ on soil microbial communities will be modulated depending on the soil moisture conditions. To test this hypothesis, we performed a 49-day fully controlled climate chamber pot experiments with soil grown with Dactylis glomerata (L.). Manure-amended pots without or with SDZ contamination were incubated under a dynamic moisture regime (DMR) with repeated drying and rewetting changes of >20 % maximum water holding capacity (WHCmax) in comparison to a control moisture regime (CMR) at an average soil moisture of 38 % WHCmax. We then monitored changes in SDZ concentration as well as in the phenotypic phospholipid fatty acid and genotypic 16S rRNA gene fragment patterns of the microbial community after 7, 20, 27, 34, and 49 days of incubation. The results showed that strongly changing water supply made SDZ accessible to mild extraction in the short term. As a result, and despite rather small SDZ effects on community structures, the PLFA-derived microbial biomass was suppressed in the SDZ-contaminated DMR soils relative to the CMR ones, indicating that dynamic moisture changes accelerate the susceptibility of the soil microbial community to antibiotics.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Combined Stress ; Community Structure ; Dissipation ; Rhizosphere ; Soil Moisture ; Sulfadiazine; Pig-manure; Veterinary Antibiotics; Medicated Pigs; Sulfadiazine; Rhizosphere; Diversity; Inhibition; Bacteria; Maize; Acid
ISSN (print) / ISBN 0175-7598
e-ISSN 1432-0614
Quellenangaben Volume: 89, Issue: 14, Pages: 6487-6495 Article Number: , Supplement: ,
Publisher Springer
Publishing Place New York
Non-patent literature Publications
Reviewing status Peer reviewed