硫化物毒性作为对美在缩性沿海沉积物中无氧氧氧化的关键控制
Paula Dalcin Martins1,2, João P R C de Monlevad1, Maider J Echeveste Medrano1
1Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen 6525 AJ, The Netherlands.
Environmental science & technology
|June 18, 2024
概括
沿海地区释放出大量的甲. 由人类活动引起的Euxinia破坏了甲循环,通过伤害甲氧化微生物增加了排放.
科学领域:
- 海洋科学 海洋科学
- 生物地质化学生物地质化学
- 微生物生态学 微生物生态学
背景情况:
- 沿海地区是海洋甲排放的热点,占总量的75%.
- 沉积物甲循环维持了生产和氧化之间的微妙平衡,限制了甲的释放.
- 人类活动可能会破坏这种平衡,可能会增加沿海沉积物中的甲泄漏.
研究的目的:
- 调查人类诱导的氧化还原转移对沿海沉积物中甲循环的影响.
- 量化在不同氧化还原条件下 (氧化,低氧化, euxinic) 的甲生产,氧化和逃逸.
- 确定破坏沿海甲生物过器的机制.
主要方法:
- 生物地质化学分析
- 微生物学分析 微生物学分析
- 基因组分析 基因组分析
- 沉积物化实验 沉积物化实验
主要成果:
- 在低氧和低氧条件下,甲生产潜力增加.
- 甲的无氧氧化在 euxinia 下被显著抑制.
- 硫化物毒性导致了在eosin沉积物中甲氧化古生物的几乎完全丧失.
- 甲从沉积物中逃逸,与低氧场所相比,在eocinic场所增加了近7倍.
结论:
- 埃克西尼亚通过抑制甲氧化来破坏沿海甲生物过器.
- 硫化物毒性是导致甲氧化原体丧失的关键机制.
- 甲生物过器的破坏可能会导致沿海地区的甲排放量大幅增加.
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