水地化学对陆地温泉微生物生态的影响
Carla Barbosa1,2, Javier Tamayo-Leiva3,4,5, Jaime Alcorta3,5
1Department of Geology, University of Chile , Santiago, Chile.
Microbiology spectrum
|September 27, 2023
概括
温泉中的微生物群落是由硫酸盐度和pH值所塑造的,而不仅仅是温度. 地热过程显著影响这些生态系统,揭示了超出简单环境因素的复杂相互作用.
科学领域:
- 微生物学 微生物学
- 地质化学 地质化学
- 生态生态学 生态生态学
背景情况:
- 陆地温泉水化学 (温度,pH) 影响微生物群落.
- 在全球范围内,生物和非生物因素之间的相互作用仍然不太清楚.
- 地下地热活动对微生物生命的影响是一个悬而未决的问题.
研究的目的:
- 调查地热过程对全球热微生物群落的影响.
- 确定在温泉中构建微生物群落的关键水化因素.
- 探索不同地热领域微生物社区结构和环境参数之间的关系.
主要方法:
- 16S rRNA amplicon测序 (V4区域) 来自El Tatio的11个新样本和来自全球地热场的191个现有样本.
- 分析温度,pH值和主要离子度.
- 对差异的排序和顺序分析,以评估社区结构驱动因素.
主要成果:
- 在酸硫酸盐水中,微生物α多样性较低.
- 和硫酸盐 (SO42-) 度与特定的微生物类 (Armatimonadota,Deinococcota,Chloroflexota,Campilobacterota,Thermoplasmatota) 有中度的相关性.
- 温度,pH和水化学只解释了微生物群落结构的24%,这表明其他因素也参与其中.
结论:
- 硫酸盐度受地质岩石和局部环境的影响,是微生物群落结构的关键,与pH.
- 地热过程,如流体相分离和氧化,至关重要.
- 没有观察到显著的地理距离衰变,这表明微生物群体在全球遥远的热带中存在着古老的分歧.
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