In recent years, karst water has been polluted by emerging pollutants such as antibiotics. In this study, the bacterial communities and antibiotic resistance genes (ARGs) in antibiotics contaminated karst river was studied in summer and winter. The concentration of antibiotics in winter karst river is higher than that in summer, and there are significant differences in structure of bacterial community and ARGs between karst river water samples. Aminoglycoside, beta-lactamase and multidrug are the main types of ARGs, and transposons play an important role in the spread of ARGs. The horizontal gene transfer (HGT) of ARGs between bacteria mediated by mobile genetic elements (MGEs) would cause the spread of ARGs and bring potential ecological risks. In addition, we found that the risk of antibiotic resistant pathogenic bacteria (ARPB) in winter was possibly higher than that in summer. It was suggested that the discharge of antibiotics, water amount and seasonal occurrence time of human intestinal diseases affect the risks caused by antibiotics contaminants. This study helps us to understand the transmission mechanism of ARGs and their potential seasonal ecological risks in complex karst water systems.
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| http://dx.doi.org/10.1016/j.watres.2021.117507 | DOI Listing |
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Article Synopsis
- Karstification helps lower CO levels in the atmosphere and soil, making it vital to understand karst carbon sinks for climate change research.
- The study focused on the Lijiang River Basin, where relationships between carbon concentrations and environmental factors like elevation and rainfall were analyzed over 14 months.
- Using advanced regression algorithms, accurate models for predicting dissolved inorganic and organic carbon concentrations were developed, showing consistent trends and enabling predictions for future carbon sink behavior in the region.
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