微生物-DOM相互作用对异质水分转移系统中生物可用性的反应
Shuqi Zhang1, Jiahe You2, Xianfang Zhu1
1Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
Water research
|December 25, 2025
概括
微生物通过利用特定的DOM分数,在水转移系统中积极塑造溶解有机物 (DOM). 这项研究揭示了微生物适应性代谢机制,对于物质循环和水安全至关重要.
科学领域:
- 环境微生物学环境微生物学
- 水生化学 水生化学
- 生物地质化学循环是什么
背景情况:
- 溶解有机物 (DOM) 是水系统中一个关键的碳池.
- 微生物-DOM相互作用对于材料循环和水质至关重要.
- 在长途水分转移系统中理解这些相互作用是有限的.
研究的目的:
- 在水分转移系统中调查各种息地的动态微生物-DOM相互作用.
- 开发一个概念模型,将DOM异质性与微生物代谢联系起来.
- 量化DOM利用模式和微生物代谢策略.
主要方法:
- 开发了一个动态的,多阶段的概念模型.
- 定义的DOM分子活性和集体代谢潜力.
- 使用微生物-DOM利用指数 (MDUI) 量化DOM利用率.
- 通过物种利基,KEGG途径和酶活性分析验证的发现.
主要成果:
- 微生物通过具有高生物转化潜力的活性分数 (28%) 控制DOM池组装.
- 多种多种类型的DUI解释了64.12%的DOM组成变化.
- 发现了三相代谢机制 (L线和H线) 控制DOM利用.
- 确定了特定的微生物群 (Uroviricota,Actinobacteria) 和涉及的代谢途径.
结论:
- 量化微生物-DOM相互作用和微生物适应性代谢机制,以响应DOM生物可用性.
- 为规范水分转移系统中的生态安全提供了理论基础和方法支持.
- 突出了活跃DOM分数在微生物生态组合中的重要性.
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