Subsurface Archaea associated with rapid geobiological change in a model Yellowstone hot spring
Subsurface Archaea associated with rapid geobiological change in a model Yellowstone hot spring
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DOI：
10.1038/s43247-022-00542-2
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发表时间：
2022-09-12
影响因子：
7.9
通讯作者：
Boyd, Eric S.
中科院分区：
文献类型：
--
作者：
Colman, Daniel R.;Amenabar, Maximiliano J.;Boyd, Eric S.
对黄石公园一个模型温泉进行的深度分辨地球化学和宏基因组分析揭示了一种以古生物为主的地下微生物组的存在，这可能导致了2018年温泉的急剧酸化。尽管经过了世纪的研究，但大陆热液场是否支持高温地下生物圈仍是未知的。煤渣池是黄石公园最深的温泉之一，由于独特的硫地球化学而被广泛研究，这归因于熔融元素硫在近似18米深的地方水解，促进了几种化学反应，保持低硫化物，低氧和近似4.0的中等pH值。经过类似100年的稳定，煤渣池在2018年经历了极端的视觉和化学变化（酸化）。在这里，我们表明，基于深度分辨的地球化学和宏基因组学的微生物群落分析前（2016年）和酸化后（2020年）表明，这些变化可能归因于地质/地球化学过程之间的反馈，地下Sulfolobales cerea的硫氧化以及熔融硫在深度的消失。这些研究结果强调了大陆热液领域的地圈和生物圈之间的动态和快速反馈，并表明地下生物圈在这些系统中比以前认识到的更普遍。
Depth-resolved geochemical and metagenomic analyses of a model hot spring in Yellowstone reveals the presence of an archaeal-dominated subsurface microbiome, which likely contributed to a dramatic acidification of the spring in 2018.Despite over a century of study, it is unknown if continental hydrothermal fields support high-temperature subsurface biospheres. Cinder Pool is among the deepest hot springs in Yellowstone and is widely studied due to unique sulfur geochemistry that is attributed to hydrolysis of molten elemental sulfur at similar to 18 m depth that promotes several chemical reactions that maintain low sulfide, low oxygen, and a moderate pH of similar to 4.0. Following similar to 100 years of stability, Cinder Pool underwent extreme visual and chemical change (acidification) in 2018. Here, we show that depth-resolved geochemical and metagenomic-based microbial community analyses pre- (2016) and post-acidification (2020) indicate the changes are likely attributable to feedbacks between geological/geochemical processes, sulfur oxidation by subsurface Sulfolobales Archaea, and the disappearance of molten sulfur at depth. These findings underscore the dynamic and rapid feedback between the geosphere and biosphere in continental hydrothermal fields and suggest subsurface biospheres to be more prevalent in these systems than previously recognized.