深海底的原核生物在地质时间的交界处受到刺激
R John Parkes1, Gordon Webster, Barry A Cragg
1School of Earth, Ocean and Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff CF10 3YE, UK. j.parkes@earth.cf.ac.uk
Nature
|July 22, 2005
概括
在海洋深处,海洋中的深处.
科学领域:
- 海洋微生物学 海洋微生物学
- 地质化学 地质化学
- 深层生物圈研究研究 深层生物圈研究
背景情况:
- 海底生物圈代表了地球上最大的 prokaryotic 息地.
- 在这种环境中的 Prokaryotes 呈现出异常低的代谢率.
- 了解深层 prokaryotic 活动对于理解全球生物地球化学循环至关重要.
研究的目的:
- 调查深海底环境中的 prokaryotic 活动和生物多样性.
- 识别在地化学和沉积物界面上刺激 prokaryotic 过程的因素.
- 评估深层沉积物 prokaryotes 的长期活动.
主要方法:
- 在太平洋边缘和开放海洋地区采样和分析海底环境.
- 量化不同深度的 prokaryotic 数量和活动率.
- 对高分子量DNA的分析,以评估 prokaryotic 的生存能力和生物多样性.
- prokaryotic 社区变化与地化学和沉积物数据的相关性.
主要成果:
- 在海洋边缘和开放的海洋场所观察到深层地表中对 prokaryotic 过程的刺激.
- 在边缘部位,在90米深处,发现 prokaryote 数量增加了13倍,活动率高.
- 生物多样性的变化与地球化学相结合,在90米的界面上有明显的社区转移.
- 在公海中, prokaryotic 数量和活动的增加与古老的藻丰富沉积物相关.
- 深沉积物 prokaryotes 在地质时间尺度上表现出高活动和变化的多样性.
结论:
- 深沉积物 prokaryotes 可以表现出显著的代谢活动.
- 海底的 Prokaryotic 多样性是动态的,受地化学和沉积体接口的影响.
- Prokaryotic 生命在地质时间的深海底环境中持续存在并保持活跃.
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