微生物群落的明确深度离散配置文件和地化学洞察力在地表下临界区域
Xiaoqin Wu1, Sara Gushgari-Doyle1, Lauren M Lui2
1Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA.
Applied and environmental microbiology
|June 5, 2023
概括
地表地化学和水文地质学控制微生物群落及其在陆地沉积物中的功能. 这些因素驱动着不同的微生物种群和代谢潜力的深度,影响营养循环.
科学领域:
- 环境微生物学环境微生物学
- 地质微生物学的生物.
- 地下地表生物地质化学
背景情况:
- 地下关键区 (SCZ) 中的微生物群落与表面土壤不同,原因是独特的地化学和水文地质条件.
- 了解这些地下微生物动态对于理解陆地生态系统功能至关重要.
研究的目的:
- 研究地质化学和水文地质学的垂直变化如何影响陆地地下沉积物中的微生物组成和代谢潜力.
- 阐明环境变量与微生物社区结构和功能在不同地下区域之间的关系.
主要方法:
- 在从浅层地下到和区的沉积物核心上整合元基因组学和地质化学分析.
- 超高分辨率质谱法用于分析溶解有机碳 (DOC) 的质量.
主要成果:
- 在SCZ中的微生物群落高度局部化,很少在垂直上相互连接.
- 微生物群落的组成和代谢潜力,特别是在碳和循环中,随着深度而显著变化.
- 从不稳定的转变为反复的DOC,越来越多的深度选择了寡头性微生物和改变碳循环代谢.
结论:
- 沉积物地质化学和水文地质学是SCZ中选择不同微生物种群及其代谢能力的关键驱动因素.
- 这些发现增强了对地下陆地环境中的微生物生态学和生物地质化学的理解.
- 这项研究为开发地下生态系统中营养循环的预测模型提供了基础.
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