气呼吸会启动微生物对深层油污的反应
David L Valentine1, John D Kessler, Molly C Redmond
1Department of Earth Science and Marine Science Institute, University of California, Santa Barbara, CA 93106, USA. valentine@geol.ucsb.edu
概括
深水地平线的天然气泄漏,主要是气和乙气,在墨西哥湾推动了微生物呼吸和氧气耗尽. 这些气体为未来的碳化合物降解准备了细菌繁殖.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 地质化学 地质化学
背景情况:
- 深水地平线漏油事件释放了大量的碳化合物进入墨西哥湾的深海.
- 了解天然气的命运,如气和乙气,对于评估泄漏的全部环境影响至关重要.
- 这些气体在深水微生物过程中的作用仍然不太清楚.
研究的目的:
- 为了调查深水地平线事件后,在深处溶解的碳化合物气体的分布和影响.
- 评估特定气体在微生物呼吸和氧气耗尽中的作用.
- 了解深海水中碳化合物生物降解的初始阶段.
主要方法:
- 在墨西哥湾深度进行化学和同位素调查.
- 在现场进行了生物降解研究,以分析微生物活动.
- 测量和分析了溶解的碳化合物气体,包括气和乙气体.
主要成果:
- 和乙被确定为驱动微生物呼吸的主要碳化合物气体.
- 这些气体在新鲜的碳化合物中所观察到的氧气枯竭中占到70%.
- 发现低多样性的细菌繁殖活跃地呼吸这些气体.
结论:
- 和乙在在深海环境中启动快速碳化合物呼吸中发挥着关键作用.
- 这些气体通过细菌繁殖的呼吸使微生物群落为其他碳化合物的降解做好了准备.
- 这个过程影响深水碳化合物释放的整体命运和影响.
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