Effects of chronic exposure of antibiotics on microbial community structure and functions in hyporheic zone sediments

Zhang, Lili; Zhang, Cheng; Lian, Keting; Liu, Chongxuan

2021-08-15

10.1016/j.jhazmat.2021.126141

JOURNAL OF HAZARDOUS MATERIALS   影响因子和分区

0304-3894

1873-3336

Microbial communities in hyporheic zones (HZ) provide vital biogeochemical functions such as contaminant degradation for river ecosystems. Antibiotics are contaminants that have been increasingly detected in HZ sediments. In this study, sediments from different HZ locations in a contaminated river, Maozhou river, China were sampled and analyzed using qPCR and high-throughput sequencing to investigate the effect of antibiotic contamination on microbial community structures and functions in HZ sediments. Results indicated that types and concentrations of antibiotics in HZ sediments were heterogeneously distributed that were largely consistent with the distribution of antibiotic sources. Sediments near animal farm and hospital contained higher antibiotic concentrations compared with those from mainstream. The distribution of ARGs was well correlated with antibiotics. Bacterial indicator genera indicating differences between mainstream area and other sampling areas were positively correlated with antibiotics, suggesting the influences of antibiotics on reshaping microbial community structures. PICRUSt revealed positive relationships between antibiotics and predicted functional genes involved in defense, signal transduction, and recombination and repair. This imply the defensive response of microbial communities on antibiotic attack. These results indicated that antibiotic contamination in the watershed posed a potential risk on HZ microbial community structures and functions, which may further threaten river ecosystem functions.

Microbial community Antibiotics Antibiotic resistance genes Hyporheic zone Sediments

SCI ; EI

英语

第一 ; 通讯

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

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000664771400001

ELSEVIER

20212310454639

Antibiotics ; Contamination ; Ecosystems ; Microorganisms ; Polymerase chain reaction ; River pollution ; Rivers ; Sediments ; Signal transduction ; Stream flow

Waterways:407.2 ; Water Pollution:453 ; Ecology and Ecosystems:454.3 ; Biological Materials and Tissue Engineering:461.2 ; Medicine and Pharmacology:461.6 ; Biology:461.9 ; Soil Mechanics and Foundations:483 ; Fluid Flow, General:631.1 ; Biochemistry:801.2

ENGINEERING

Web of Science

Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China

Zhang, Lili,Zhang, Cheng,Lian, Keting,et al. Effects of chronic exposure of antibiotics on microbial community structure and functions in hyporheic zone sediments[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,416.

Zhang, Lili,Zhang, Cheng,Lian, Keting,&Liu, Chongxuan.(2021).Effects of chronic exposure of antibiotics on microbial community structure and functions in hyporheic zone sediments.JOURNAL OF HAZARDOUS MATERIALS,416.

Zhang, Lili,et al."Effects of chronic exposure of antibiotics on microbial community structure and functions in hyporheic zone sediments".JOURNAL OF HAZARDOUS MATERIALS 416(2021).