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铁氧化剂和碳固定微生物群落在自然湿地中的分布和相关性

Leheng Dong¹, Xugang Wang², Hui Tong¹

¹National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.

The Science of the total environment

|December 1, 2023

概括

微空气性铁氧化细菌 (mFeOB) 和碳固定微生物在湿地共存. 它们之间的关系与铁和碳循环有关,环境因素影响微生物群落和碳捕集潜力.

科学领域:

环境微生物学环境微生物学
生物地质化学循环的过程
湿地生态系统湿地生态系统

背景情况:

微空气友好型铁氧化细菌 (mFeOB) 属莲科属,是湿地中碳捕获至关重要的自营养物.
在这些环境中,铁和碳循环微生物之间的相互作用仍然不太清楚.

研究的目的:

在湿地土壤中调查与里昂氏菌相关的mFeOB和碳固定微生物 (通过cbbL和cbbM基因识别) 的分布和相关性.
确定影响这些微生物群体社区结构的环境因素.

主要方法:

从各种湿地环境中采集了土壤样本.
量化了mFeOB和碳固定基因 (cbbL,cbbM) 的丰度.
分析了微生物群落结构及其与物理化学参数的相关性 (例如,Fe (II) 度,氧还原潜力,溶解无机碳,氧).

主要成果:

在mFeOB丰度和cbbL和cbbM基因丰度之间观察到显著的正相关性.
赛德洛克西达斯 (Sideroxydans lithotrophicus) ES-1和里昂蕾拉 (Gallionella capsiferriformans) ES-2是主要的mFeOB.
阿尔法蛋白质细菌,贝塔蛋白质细菌和蛋白质细菌构成了主要的碳固定社区.
可提取的Fe (II) 度影响了mFeOB社区的组成,而溶解的无机碳,氧,氧化还原潜力和Fe (II) 影响了cbbL和cbbM社区.

结论:

mFeOB和碳固定微生物在湿地土壤中表现出协同作用的关系,在铁氧化和碳固定中发挥着联合作用.
环境因素在很大程度上影响了这些微生物群落的形成,影响了湿地的整体碳捕集能力.

关键词:

碳固化是一种碳固化的方法.固定碳的微生物群落.铁 (Fe) 的氧化过程氧化Fe (II) 的细菌会导致氧化.湿地湿地湿地

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