与痕迹金属度的时间变化相关的对沉积微生物群落的影响
Christopher K Jones1, Jessica M Labonté2, Lauren A Haygood3
1Department of Earth and Planetary Sciences, University of California, Riverside, Riverside, California, USA.
Geobiology
|July 9, 2025
概括
海洋沉积物中的微生物群落由于交代而发生变化, (Mn), (Co),银 (Ag) 和 (Tl) 等金属推动了这些变化. 这揭示了地球生物地球化学循环中的关键反.
科学领域:
- 地质化学和微生物学
- 海洋生物地质化学海洋生物地质化学
- 深度生物圈研究研究
背景情况:
- 海洋沉积物中的微生物过程控制元素循环和氧化还原条件.
- 微量金属对微生物群落至关重要,但在高度下可能具有抑制作用.
- 代谢释放铁 (Fe) 和 (Mn) 氧化物中的微量元素,影响微生物的新陈代谢.
研究的目的:
- 为了分析模拟diagenesis期间海洋沉积物的地化学和微生物学变化.
- 为了研究在微生物社区结构上在diagenesis期间调动的微量金属的作用.
- 了解深层生物圈环境中的金属循环和微生物群落之间的反.
主要方法:
- 从东斯科西亚山脊的沉积物核心进行地化学和微生物学分析.
- 沉积物样本的无氧化以模拟二代遗传过程.
- 对主要,次要和微量金属的分析,以及每4个月间隔的16S rRNA基因测序.
主要成果:
- 在早期基因生成过程中,Mn和微量金属 (Mo,Ni,Tl,Cu) 的调动.
- 微生物群落组成的显著变化,多样性指标下降.
- 孔水金属度 (Mn,Co,Ag,Tl) 和微生物群落结构之间的统计相关性.
结论:
- 铁和Mn (oxyhydr) 氧化物充当微量金属的运输工具,影响深层生物圈.
- 基因循环金属对海洋微生物群落和生物地化学循环产生重大影响.
- 这些发现提供了对新陈代谢途径演变和地球历史的洞察.
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