在类抗生素污染的河流中,周围生物的结构和功能分布的季节性变化
Baihuan Zhang1, Wenqian Yu1, Jiayi Liang1
1Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China.
Environmental pollution (Barking, Essex : 1987)
|February 11, 2024
概括
来自污水处理厂的宏类抗生素改变了河流周边细胞的结构,但没有功能. 抗生素污染影响了微生物群落,但功能冗余维持了整体光合作用活动和碳利用.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 微生物学 微生物学
背景情况:
- 周围生物是水生生态系统中关键的微生物群落.
- 已知宏类抗生素在受控环境下会损害水生生物和生态系统功能.
- 宏化物污染对河流周边生物的影响仍未得到充分研究.
研究的目的:
- 为了研究在中国扎奥河 (Zao River) 中五种主要宏体的时空分布.
- 评估宏化物污染对周围植物结构,光合作用活动和碳利用的影响.
- 为了将化物存在与周边社区组成和功能变化相关联.
主要方法:
- 在不同季节 (三月,六月,九月2023年) 从扎奥河收集了水和周边植物样本.
- 使用分析技术量化了五种宏化物 (AZI,ROX,ERY,CLA,ERY-H2O) 的度.
- 分析了周围生物群体的结构 (微生物组成) 和功能参数 (光合作用活动,碳利用).
主要成果:
- 在所有污水处理厂 (STP) 受影响的地点检测到宏化物,其度在水中高达2.18μg/L,在周围环境中高达9.67μg/g.
- 麦克罗利德的存在与特定的细菌 (Firmicutes,Exiguobacterium) 和藻类 (Cyanobacteria,Chlorophyta) 种类负相关.
- 光合作用活动和碳利用在很大程度上保持不变,除了在高抗生素水平下降的酸代谢.
结论:
- 从STP中释放的宏类物质显著改变了河流周边生物的结构组成.
- 周边社区的功能冗余可能掩盖了对整体生态系统功能的影响.
- 需要进一步的中宇宙实验来证实这些现场观测.
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