抗生素耐药性基因和细菌社区结构在基质生物膜中的动态
Yaguang Li1, Kexuan Liu2, Hanwen Qiu3
1Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China; Shanghai Shifang Ecology and Landscape Co., Ltd, Shanghai, 200233, PR China.
Journal of environmental management
|December 6, 2024
概括
这项研究揭示了与水相比,废水基板上的废水生物膜中明显的抗生素耐药性基因 (ARG) 概况. 基质生物膜显示出更高的多药ARG,受季节,微生物群落和温度和营养等环境因素的影响.
科学领域:
- 环境微生物学环境微生物学
- 污水处理 污水处理 污水处理
- 抗生素耐药性 抗生素耐药性
背景情况:
- 基板上的生物膜对于废水处理至关重要,积累了抗生素耐药性基因 (ARG).
- 对基质附着生物膜及其ARG动态的研究是有限的.
- 了解这些生物膜中的ARG流行率和微生物群落对于有效的废水管理至关重要.
研究的目的:
- 研究不同基板 (陶,生物质过器,钢渣) 上的生物膜中的ARG和微生物动态的流行和继承,与水生物膜相比.
- 确定影响ARG概况和微生物社区结构的关键环境因素.
- 为优化基质选择和ARG控制的生态管理提供见解.
主要方法:
- 一项为期一年的研究比较了基板生物膜与水生物膜中的ARG概况和微生物群落.
- 分析ARG的丰富性,多样性和社区结构.
- 微生物群落,ARG和环境参数 (氨,温度,总,总有机碳,ORP) 之间的相关性分析.
- 应用中立社区模型来评估ARG组装流程.
主要成果:
- 在基质和水生物膜之间观察到不同的ARG配置文件,基质生物膜显示了多种药物和类ARG的比例较高.
- 季节性变化对ARG多样性产生了重大影响,春季显著增加.
- 中立社区模型表明随机过程主要驱动ARG组装.
- 微生物群落的分布主要受到氨,温度和总的影响,温度是关键因素.
- ARG的结构变化主要是由总有机碳,温度,ORP和氨所驱动的.
结论:
- 基质类型显著影响废水生物膜中的ARG概况和微生物群落.
- 环境因素,特别是温度和营养水平,在塑造微生物和ARG动态方面发挥着关键作用.
- 结果为选择最佳基板和实施生态管理提供了策略,以减轻废水处理系统中的ARG丰富.
- 这项研究有助于推进水生生态恢复和污染控制工作.
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