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Antti J Rissanen^1,2, Tom Jilbert³, Asko Simojoki⁴

¹Faculty of Engineering and Natural Sciences, Tampere University , Tampere, Finland.

Microbiology spectrum

|September 12, 2023

概括

化增加了湖泊沉积物中的不稳定有机物,促进了甲的产生和改变了微生物群落. 这项研究揭示了有机物质可变性如何影响湖泊沉积物中的产生甲和消耗甲的微生物.

科学领域:

环境微生物学环境微生物学
地质化学地质化学
临界技术临界技术

背景情况:

幼化提高了不稳定有机物 (OM) 进入湖泊沉积物的量.
这种OM输入可以通过增强甲生产和减少甲氧化来增加甲 (CH4) 排放.
对沉积物中甲相关微生物群落结构的OM可变性的影响仍未得到充分研究.

研究的目的:

研究有机物可变性对湖泊沉积物中甲性和甲性微生物群落结构的影响.
将沉积物地化学,包括OM来源和氧化还原条件,与微生物社区组成联系起来.

主要方法:

在五个湖泊站进行垂直沉积物和孔水地质化学分析.
使用沉积物C:N比率对有机物质来源的评估.
16S rRNA基因扩增序列测序以描述微生物群落.

主要成果:

较高的OM可变性与增加的重矿化,电子受体消耗和甲排放相关.
增加的OM可变性导致无氧酸盐氧化甲类植物 (Candidatus Methylomirabilis) 相对于有氧甲类植物 (Methylococcales) 的相对丰度下降.
甲性社区与甲性社区的比例随着OM可变性增加而下降,特别影响了Candidatus Methylomirabilis.

结论:

增加不稳定有机物输入显著改变了湖泊沉积物中产生甲和消耗甲的微生物群落的结构.
由OM可变性驱动的沉积物氧化还原区变化是影响微生物社区动态的关键因素.
有机物可变性是湖泊沉积物甲循环社区活动和结构的关键决定因素.

关键词:

16S rRNA 基因是16S 的基因.肥胖症是什么肥胖症是什么肥胖症是什么淡水淡水水的情况.温室气体的温室气体是什么甲原体的产生作为一个甲类植物.

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