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长期Euxinia限制了微生物的甲去除在eutrophic沿海盆地
Jessica Venetz1, Nicky Dotsios1, Olga M Żygadłowska1,2
1Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, 6500 HC Nijmegen, The Netherlands.
Environmental science & technology
|October 8, 2025
概括
长期无氧的性水减少了细菌的甲去除. 这创造了一个反循环,增加了沿海水域的甲排放,特别是随着全球变暖.
科学领域:
- 海洋微生物生态学
- 生物地质化学循环是什么
- 气候变化影响气候变化的影响.
背景情况:
- 沿海水域的有氧甲氧化细菌 (MOB) 减轻甲排放.
- 随着气候变暖和环保增强,分层延长,增强无氧和硫化条件 (euxinia).
- 厄克西尼亚可能会对MOB的甲去除能力产生负面影响.
研究的目的:
- 在不同程度的 euxinia 的地点比较水柱甲去除.
- 调查长期eocinia对甲氧化细菌和整体甲排放的影响.
- 了解沿海生态系统中分层, euxinia 和甲排放之间的反循环.
主要方法:
- 在2022年夏天在斯德哥尔摩群岛进行实地研究.
- 对不同地点的甲排放,甲和硫化物度以及甲氧化潜力的比较.
- 评估MOB的丰富性,活性,细菌多样性和微生物网络连接.
主要成果:
- 长期的eocinic条件与更高的甲排放和硫化物积累相关.
- 甲氧化潜力在持久性eocinic底水中明显较低.
- 虽然MOB在季节性质的eocinic层中表现出活性,但在长期的eocinic区域中,它们的容量减少了.
- 持续的eocinia导致细菌多样性和网络连接性降低,有利于硫循环细菌.
结论:
- 沿海水域长期存在的eocinia会通过影响MOB而降低甲生物过器的容量.
- 这种减少可以导致一个积极的反循环,放大甲排放.
- 由于全球变暖,浅,分层的沿海水域特别容易受到甲释放的增加.
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