The combined effect of sulfadiazine and copper on soil microbial activity and community structure

TitleThe combined effect of sulfadiazine and copper on soil microbial activity and community structure
Publication TypeJournal Article
Year of Publication2016
AuthorsXu Y.G, Yu W.T, Ma Q., Wang J., Zhou H., Jiang C.M
JournalEcotoxicology and Environmental Safety
Volume134
Pagination43-52
Date PublishedDec
Type of ArticleArticle
ISBN Number0147-6513
Accession NumberWOS:000385607400007
Keywordsagricultural soils, animal manures, antibacterial activity, antibiotics, Dissipation, Environmental Sciences & Ecology, fatty-acid-composition, heavy-metals, Phospholipid fatty acid, pig-manure, rapid method, soil microorganisms, sulfonamide, swine manure, toxicology, Toxity, veterinary antibiotic sulfadiazine
Abstract

Elevated concentrations of heavy metals and antibiotics often coexist in agricultural soils due to land application of large amounts of animal manure. The experiment was conducted to investigate the single and joint effects of different concentrations of sulfadiazine (SDZ) (10 mg kg(-1) and 100 mg kg(-1)) and copper (Cu) (20 mg kg(-1) and 200 mg kg(-1)) on soil microbial activity, i.e. fluorescein diacetate (FDA) hydrolysis, dehydrogenase (DHA) and basal respiration (BR), microbial biomass and community structure estimated using phospholipid fatty acids (PLFA), and community level physiological profiles (CLPP) using MicroResp (TM). High concentration of SDZ or Cu significantly reduced microbial activity during the whole incubation period, while the inhibiting effect of low concentration of SDZ or Cu was only visible within 14 days of incubation. The total PLFA concentration was reduced by SDZ and/or Cu, which resulted from reduced bacterial and actinomycetic biomass. The addition of SDZ and/or Cu decreased the bacteria:fungi ratio, whereas only the addition of high Cu concentration significantly decreased Gram(+) :Gram(-) ratio. The addition of Cu obviously inhibited the dissipation of SDZ, which could affect the combined effects of both on microbial activity, biomass and community structure. Principal component analysis of the CLPP and PLFA data clearly revealed the notable effects of SDZ and/or Cu on soil microbial community structure. (C) 2016 Published by Elsevier Inc.

Short TitleEcotox. Environ. Safe.Ecotox. Environ. Safe.
Alternate JournalEcotox. Environ. Safe.
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Times Cited: 0
Cited Reference Count: 76
Xu, Yonggang Yu, Wantai Ma, Qiang Wang, Jing Zhou, Hua Jiang, Chunming
National Key Technology RD Program [2015BAD05B01]
The authors gratefully acknowledge financial support from the National Key Technology R&D Program (No. 2015BAD05B01).

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Academic press inc elsevier science
San diego
1090-2414
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