评估反抗性溶解有机物在城市化淡水生态系统中的细菌社区动态中的作用
Yang Liu1, Xiding Wang1, Huimin Li1
1Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan 030006, China.
The Science of the total environment
|November 11, 2024
概括
溶解有机物 (DOM) 组成显著影响微生物群落. 富含碳素的环分子 (CRAM) 和稳定性岛屿 (IOS) 化合物对于碳储存至关重要,污染改变了这些关键的生态作用.
科学领域:
- 环境化学环境化学
- 微生物生态学 微生物生态学
- 评估水质水质的评估.
背景情况:
- 溶解有机物 (DOM) 和反的溶解有机物 (RDOM) 不同地影响微生物群落.
- 描述这些角色是具有挑战性的,特别是在人类影响的生态系统中.
- 芬河为比较原始和城市化的水生环境提供了一个案例研究.
研究的目的:
- 为了研究DOM和RDOM在Fen河的分子组成和生态影响.
- 为了比较原始的上游地区与城市化的下游地区.
- 了解人为影响如何影响DOM特征和微生物群落.
主要方法:
- 16S rRNA基因测序用于微生物社区分析.
- 基于LC-MS的代谢学,用于分子分析.
- 光谱学和FT-ICRMS用于DOM表征.
主要成果:
- 在上游和下游站点之间观察到微生物群落组成,多样性和功能的显著变化.
- 上游DOM显示出更高比例的复杂,高分子量化合物,包括富含碳素的环分子 (CRAM) 和稳定性岛屿 (IOS) 化合物.
- 下游DOM的芳香度较低,CRAM和IOS降低,表明人为影响和改变的碳捕集潜力.
结论:
- 对于DOM稳定性和微生物社区调节,CRAM和IOS至关重要.
- 人类活动显著改变了河流系统中的DOM分子组成和生态功能.
- 有针对性的污染控制对于保持城市化水体生态系统健康至关重要.
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