Structure and function response of bacterial communities towards antibiotic contamination in hyporheic zone sediments

Zhang，Lili1,2; Zhang，Antai1; Yang，Yitong1; Zhang，Cheng1; Lian，Keting1; Liu，Chongxuan1

2022-12-01

10.1016/j.chemosphere.2022.136606

CHEMOSPHERE   Impact Factor & Quartile

0045-6535

1879-1298

Bacterial communities are crucial for processing and degrading contaminants in hyporheic zones (HZ). However, the effects of antibiotics on HZ bacterial communities have seldom been addressed. Here, using MiSeq 16S amplicon sequencing technology, the effects of acute exposure to Enrofloxacin, Sulfathiazole, Tetracycline hydrochloride, and Penicillin V potassium on HZ bacterial communities were investigated. Results revealed that HZ sediment communities responded differently to different classes of antibiotics, reflecting the distinct selection stress of antibiotics on HZ bacterial communities. Besides, HZ communities from the locations with more severe antibiotic contamination backgrounds (∼150 μg kg) were more resistant towards antibiotic treatment. Compared with small/non-significant changes in HZ community diversity and composition treated with ng L∼ug L level antibiotics compared to the control group, treatments with antibiotics over mg L level significantly reduced the diversity and changed the structures of HZ bacterial communities, and enhanced the resistance of the community to antibiotics by enriching antibiotic resistant bacteria. The exposure to mg L level antibiotics also changed community functions by restricting the growth of functional bacteria, such as ammonia oxidizing bacteria (AOB) Nitrosomonas, resulting in ammonia accumulation in sediments. The results implied that at field-relevant concentrations, there was no or minor effect of antibiotics on HZ bacterial community structure and functions, and only those areas with high antibiotic concentrations would have effects.

Antibiotic contamination Antibiotic resistance genes Bacterial community function Hyporheic zone Nitrification

SCI

English

First ; Corresponding

Guangdong Science and Technology Department[2017ZT07Z479];National Natural Science Foundation of China[41830861];National Natural Science Foundation of China[41907359];

Environmental Sciences & Ecology

Environmental Sciences

WOS:000868269300008

PERGAMON-ELSEVIER SCIENCE LTD

ENVIRONMENT/ECOLOGY

2-s2.0-85139299075

Scopus

1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518060,China

Zhang，Lili,Zhang，Antai,Yang，Yitong,et al. Structure and function response of bacterial communities towards antibiotic contamination in hyporheic zone sediments[J]. CHEMOSPHERE,2022,309.

Zhang，Lili,Zhang，Antai,Yang，Yitong,Zhang，Cheng,Lian，Keting,&Liu，Chongxuan.(2022).Structure and function response of bacterial communities towards antibiotic contamination in hyporheic zone sediments.CHEMOSPHERE,309.

Zhang，Lili,et al."Structure and function response of bacterial communities towards antibiotic contamination in hyporheic zone sediments".CHEMOSPHERE 309(2022).