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在河口红树林沉积物中,潜在的氨氧化率和微生物社区动态的盐度驱动的变化

Chenqingfeng Gao¹, Yanshu Wang¹, Shengjie Li²

¹Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China.

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|November 7, 2025

概括

盐度梯度在河口湿地显著影响氨氧化,中等盐度区域显示的最高率. 微生物群落随着盐度的变化而变化,影响这些重要生态系统中的循环.

科学领域:

环境微生物学环境微生物学
地质化学地质化学
沿海生态沿海生态

背景情况:

河口湿地是盐度梯度影响循环的关键接口.
氨氧化是循环中的一个关键过程,对盐度非常敏感.
了解这些动态对于沿海生态系统的健康和管理至关重要.

研究的目的:

量化分析潜在的氨氧化率 (PAR) 和微生物群落的时空变化.
研究不同盐度梯度 (0-40) 对红树林湿地沉积物中这些过程的影响.
为了确定盐度,季节和氨氧化微生物群落之间的关系.

主要方法:

在中国海湾自然盐度梯度沿线的12个地点进行现场采样.
对潜在的氨氧化率 (PAR) 的定量分析.
评估微生物群落的组成和丰度的变化,以应对盐度.

主要成果:

夏季的PAR比冬季高,在中等盐度地区达到峰值.
低盐度和高盐度都抑制了氨氧化率,显示了一个单模模式,最佳盐度与in situ条件相关.
氨氧化古生物 (AOA) 通常在氨氧化细菌 (AOB) 上占主导地位,在盐度梯度上观察到特定属 (Nitrosomonas,Nitrospira,Nitrosopumilus) 的变化.

结论:

盐度是控制氨氧化率和河口湿地微生物群落结构的关键因素.
季节性变化和盐度有复杂的相互作用,影响循环过程.
调查结果为湿地管理和在不断变化的沿海环境中污染补救提供了洞察力.

关键词:

在AOAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 在AOAAAAAAAA 在AOAAAAAA 美国AOB AOB 氨的氧化方式氨氧化盐分盐分盐分盐分盐分湿地湿地是一个湿地.

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