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沉积物酸盐减少过程受到了中国南部非本土的Sonneratia apetala种植园的影响

Zhenzhen Teng¹, Xianbiao Lin²

¹College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.

The Science of the total environment

|October 3, 2023

概括

红树林的保护和恢复通过增加对和有机物 (DNRA) 的仿真性酸盐降解来增强沿海生态系统的固. 这创造了一个积极的循环,提高了红树林和微生物的营养可用性.

科学领域:

河口和海岸生态学
生物地质化学循环的过程
微生物生态学微生物生态学

背景情况:

酸盐 (NO_x^-) 减少在沿海生态系统中至关重要,但影响不同年龄的红树林中这些过程的因素仍然不清楚.
了解沉积物循环对于管理沿海水质和生态系统健康至关重要.

研究的目的:

研究沉积物酸盐减少过程的动态以及不同年龄的红树林中相关的微生物基因丰度.
确定控制红树林沉积物中气损失和保留的关键生物和非生物因素.
评估红树林保护和恢复对循环的影响.

主要方法:

使用N稳定同位素配对技术来量化脱,anammox和异样化酸盐降解到 (DNRA) 的速率.
使用定量PCR测量关键功能基因 (nirS,anammox 16SrRNA,nrfA) 的丰富性.
分析了不同红树林年龄和条件的沉积物有机物含量.

主要成果:

脱,亚纳摩克斯和DNRA的速度因空间和季节而异,有机物和微生物的丰度被确定为控制损失和留的主要因素.
红树林的保护和恢复显著增加了DNRA率,DNRA/...脱+亚纳摩克斯比率 (NIRI),有机物质含量和微生物丰度.
超过40年 (1980-2020年),中国沿海湿地的红树林保护和恢复估计增加了沉积物留量约931.81t N yr-1和减少损失约481.32t N yr-1.

结论:

红树林的恢复和保护通过增加生物质积累和DNRA活动显著增强沉积物气保留.
这些过程创建了一个积极的反循环,为林和微生物生长提供更多的营养在限生态系统中.
这些发现强调了红树林生态系统对沿海管理的生态和生物地球化学重要性.

关键词:

亚纳姆莫克斯 (Anammox) 是一个这是DNRA的DNRA.脱化过程中的脱.红树林保护/恢复沉积物索纳拉蒂亚阿佩塔拉种植园

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