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硫酸盐降解微生物在温带和永久冷的海洋沉积物中的意外碳利用活动

Xiuran Yin^1,2,3,4, Guowei Zhou^1,5, Haihua Wang^1,2,6

¹State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 58 Renmin Avenue, Haikou 570228, China.

The ISME journal

|February 16, 2024

概括

海洋沉积物中的硫酸盐降解微生物 (SRM) 主要使用溶解的无机碳 (DIC) 和,而不是有机发酵产品. 减少金属的微生物主导着有机物循环,影响海洋碳循环.

科学领域:

海洋微生物学海洋微生物学
生物地质化学生物地质化学
环境科学环境科学

背景情况:

海洋沉积物中存在各种硫酸盐降解微生物 (SRM),这些微生物对有机碳降解至关重要.
由于微生物和环境的复杂性,在现场SRM活动中确定特定的碳和能源是具有挑战性的.

研究的目的:

研究海洋沉积物中各种硫酸盐减少微生物 (SRM) 所利用的现场碳和能源.
区分SRM和其他微生物群体在有机物矿化中的作用.

主要方法:

基于RNA的稳定同位素探测 (SIP) 用于跟踪基质的微生物同化.
在温带和永久冷的海洋沉积物中研究了微生物活动.
使用了潜在的SRM基板,包括低度的有机发酵产品和溶解无机碳 (DIC).

主要成果:

减少硫酸盐的微生物 (SRM) 在有机发酵产品的矿化过程中表现出很小的参与.
在利用有机发酵产品方面,减少金属的微生物占主导地位.
不同的SRM群组使用 (H2) 作为电子供体,积极同化13C标记的溶解无机碳 (DIC).

结论:

这项研究表明,海洋沉积物中的许多硫酸盐降解微生物 (SRM) 倾向于自营养生活方式,利用溶解无机碳 (DIC) 和.
减少金属的微生物在异质有机物循环中起着重要作用.
这些发现揭示了不同微生物群体对海洋沉积物中碳流的意想不到的调节.

关键词:

这就是RNA-SIPIP.碳利用利用碳的利用.发酵产品是发酵的产品.减少硫酸盐的微生物

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