沿海地区淡水沉积物中的去除:N-损失路径和环境控制
Fei Ye1,2, Lei Duan1,2, Yaqiao Sun1,2
1School of Water and Environment, Chang'an University, Xi'an, China.
Frontiers in microbiology
|September 4, 2023
概括
沿海地区通过脱,非仿制性降解为氨 (DNRA) 和anammox去除. 像溶解有机碳和铁这样的环境因素会影响这些去除过程.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- 沿海区域对于生态系统中的去除至关重要.
- 以前的研究往往侧重于单一的去除过程,忽视了相互作用和环境影响.
- 了解沿海地区复杂的转化机制对于管理污染至关重要.
研究的目的:
- 阐明多层岩石学沿海区域中去除机制.
- 研究不同转化过程 (脱,DNRA,anammox) 之间的相互作用.
- 确定影响去除效率的关键环境因素.
主要方法:
- 利用了分子生物技术,微宇宙培养实验和15N稳定同位素追踪.
- 分析了去除率和功能基因 (norB,nirS,nrfA) 和anammox细菌的丰富性.
- 评估环境条件的影响,如溶解的有机,酸盐,Fe (II) 和溶解的有机碳.
主要成果:
- 移除的速率在4.14-35.19μmol·N·kg-1·h-1.1之间.
- 脱,DNRA和anammox共同促进了的去除,其中脱占主导地位 (59.6%).
- 高溶解有机与酸盐的比率有利于脱化,而低酸盐 (<0.06 mg/kg) 则促进了DNRA. (Fe) 和溶解的有机碳也显著影响了的去除.
结论:
- 沿海地区的除是一个复杂的过程,由多个微生物途径驱动.
- 环境因素,包括Fe (II) 和溶解的有机碳,在调节转化速率方面发挥着关键作用.
- 这些发现为沿海区域管理和减轻全球污染提供了洞察力.
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