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深陆地土著微生物群落由候选菌 (Candidatus) 主导的Frackibacter

Sian E Ford¹, Greg F Slater¹, Katja Engel²

¹School of Earth, Environment and Society, McMaster University, Hamilton, ON Canada.

Communications earth & environment

|January 1, 2025

概括

深层地下微生物,包括 *Candidatus* Frackibacter,在古老的盐水地下水中繁荣发展. 这些发现扩大了我们对地球深层生物圈和潜在的地球外生命的理解.

科学领域:

地质微生物学的生物.
天体生物学天体生物学
环境科学环境科学

背景情况:

深层地下微生物群落对于理解地球的生物地球化学和寻找外星生命至关重要.
基德克里克天文台提供了一个独特的环境,用于研究古老的微生物生态系统,其居住时间超过10亿年.

研究的目的:

描述基德溪观测站地下裂纹水系统中的微生物群落.
研究在这个古老的环境中占主导地位的微生物物种的代谢潜力和起源.

主要方法:

16S rRNA基因测序用于识别微生物种群.
对脂脂肪酸 (PLFA) δ13C值进行分析,以推断碳来源.
对微生物群落的假设功能预测进行生物信息分析.

主要成果:

从矿山环境中分离出来的微生物群落主要由 *Candidatus* Frackibacter 占据主导地位,它是一种来自 *Halobacteroidaceae* 家族的假定无氧和性细菌.
暴露在矿山环境中的生物样本和生物膜含有有氧 * Sphingomonas * 种类.
有证据表明, *Candidatus* Frackibacter利用来自古老,富含碳的岩层的碳,表明其存在于各种深层盐水地下水中.

结论:

*Candidatus* Frackibacter原产于碳丰富的岩石环境中的深层盐水,不仅限于水力压裂盆地.
这项研究增强了我们对深层地下微生物生态及其对天体生物学的影响的理解.
这项研究强调了微生物生命在极端地下生态系统中的适应能力和古代起源.

关键词:

天体生物学天体生物学碳循环是一个碳循环.地质化学地质化学微生物生态学微生物生态学

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