应对长江地下河口水文变化的转化和驱动因素
Dongsheng Li1, Yunduo Zhao2, Zhongfang Liu1
1State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China.
Journal of environmental management
|July 4, 2025
概括
地下河口 (STEs) 是了解从海底地下水排放 (SGD) 中去除的关键. 溶解性酸盐降解为 (DNRA) 是长江 STE 中的主要转化过程,超过了脱.
科学领域:
- 海洋生物地质化学海洋生物地质化学
- 沿海生态 沿海生态
- 微生物生态学 微生物生态学
背景情况:
- 海底地下水排放 (SGD) 显著影响沿海营养物质负载和海洋环氧化.
- 地下河口 (STEs) 是SGD驱动的营养转化发生的关键接口,影响流.
- 了解STEs中的循环对于准确的SGD影响评估和沿海管理至关重要.
研究的目的:
- 调查长江地下河口的不同水文单位的转化潜力和微生物驱动因素.
- 量化不同转化途径的贡献,特别是异样化酸盐降解为 (DNRA),在STE.
- 确定水文条件如何影响长江东部的循环和微生物群落.
主要方法:
- 分析不同水文区的转化基因丰度 (nrfA + nirB, nasA, napA).
- 使用分子和地化学技术量化转化途径,包括DNRA和脱,使用分子和地化学技术.
- 转化速率和基因表达与环境参数和水文条件的相关性.
主要成果:
- 分离性酸盐降解为 (DNRA) 被确定为主要的转化途径,约占总转化的35%和酸盐降解的83%以上.
- 关键的转化基因 (nrfA + nirB,nasA,napA) 的相对丰富程度各不相同,其中nrfA + nirB是最丰富的.
- 虽然水文单位的转换比例相似,但影响这些过程的环境因素不同,这凸显了水文区分的重要性.
结论:
- DNRA是长江地下河口中提取的主要机制,比脱起了更重要的作用.
- 水文条件是微生物群落结构和功能的关键驱动因素,从而影响STEs内的转化过程.
- 精确评估SGD衍生的气流和有效的沿海环境管理需要详细了解STEs内的水文变化.
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