城市化加剧了河流网络中致病细菌的决定性选择:通过DOM-细菌相互作用,以为导向的利基分区和跨度风险预测
Kun Shi1, Jiafeng Zhang1, Yuting Zhao2
1School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
Environmental research
|July 16, 2025
概括
城市化增加了河流和改变溶解有机物 (DOM),推动了致病和非致病细菌的多样性. 影响病原细菌,而DOM调节相互作用,为城市河流健康风险评估提供信息.
科学领域:
- 环境微生物学环境微生物学
- 城市生态学 城市生态学
- 水质科学 水质科学
背景情况:
- 城市化显著改变了河流溶解有机物 (DOM) 和营养成分.
- 影响城市河流中病原性和非病原性细菌群落的特定机制尚未完全理解.
- 了解这些动态对于评估城市水道中的公共卫生风险至关重要.
研究的目的:
- 研究DOM和对城市河流系统中的细菌群落的影响.
- 区分DOM和在塑造病原性与非病原性细菌种群中的作用.
- 探索细菌相互作用和社区结构的时空调节.
主要方法:
- 使用高通量测序来分析细菌群体的组成.
- 使用光谱技术来描述溶解有机物 (DOM) 的特性.
- 应用机器学习算法来识别关键的环境驱动因素.
主要成果:
- 下游的城市河流呈现出较高的含量和DOM,其湿度低,具有本土特征.
- 在下游观察到最大的细菌多样性,包括致病性和非致病性物种,这是由物种替代驱动的.
- 显著增加了致病细菌的决定性选择压力,城市污水是主要的贡献者.
- 溶解有机物 (DOM) 解释了大量的致病性细菌变异,与蛋白质类似的DOM显示季节性影响.
- 细菌网络的复杂性在下游和冬季增加.
结论:
- 在城市河流中致病细菌的利基区分中发挥着关键作用.
- 溶解有机物 (DOM) 时空调节细菌相互作用和社区结构.
- 这些发现为开发城市化河流系统的健康风险警告提供了框架.
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