海水的入侵调节了长江地下河口的微生物社区结构和功能潜力
Yunduo Zhao1, Dongsheng Li2,3
1Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, China.
Frontiers in microbiology
|December 24, 2025
概括
海水的入侵改变了地下河口的微生物群落. 虽然多样性随着海水的增加而增加,但关键营养循环基因减少,特定的离子证明比盐度更强的驱动因素.
科学领域:
- 沿海生物地质化学
- 微生物生态学 微生物生态学
- 环境科学环境科学
背景情况:
- 由于微生物活动,地下河口 (STE) 对沿海生物地质化学至关重要.
- 在气候变化下,了解微生物对海水入 STE 的反应至关重要,但仍然不清楚.
研究的目的:
- 研究海水入侵对地下河口微生物群落结构和功能的影响.
- 阐明驱动这些微生物转移的机制,考虑盐度以外的因素.
主要方法:
- 利用同位素技术和高通量测序来分析微生物社区的变化.
- 微生物多样性和功能基因丰度与海水 (PSW) 的比例相关.
- 分析了微生物共发生网络,并比较了盐度与特定离子度的影响.
主要成果:
- 微生物多样性与PSW正相关,而,和硫循环基因显示出负相关性.
- 海水入较低的层表现出微生物多样性指数 (Chao和Shannon) 的显著下降.
- 预测性功能分析表明,在较少入侵的区域中,可变碳分解减少,反抗性碳,,和硫循环基因增加.
- 微生物网络的稳定性和模块化程度因入侵水平而异.
- 特定离子度 (NH4+,PO42−,SO42−) 比总盐度更好地预测微生物变异.
结论:
- 海水的入侵显著改变了地下河口中的微生物群落结构和功能.
- 特定的离子选择性压力,而不是总的盐度,是微生物社区在 STE 中变化的关键驱动因素.
- 研究结果提供了对海水侵入的沿海微生物反应的见解,并为沿海生物地化学循环的预测提供了信息.
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