变暖和环氧化相互作用驱动浅层湖泊甲氧化社区的变化
Thomas P A Nijman1, Thomas A Davidson2,3, Stefan T J Weideveld4
1Department of Aquatic Ecology and Environmental Biology, Institute for Water and Wetland Research, Radboud University, Nijmegen, The Netherlands. tom.nijman@ru.nl.
ISME communications
|November 8, 2023
概括
淡水湖中的甲氧化细菌 (MOB) 受到化和变暖的影响. 气候变暖改变了MOB社区,可能降低了他们减轻甲排放的能力.
科学领域:
- 环境微生物学环境微生物学
- 水生生态学 水生生态学
- 气候变化科学 气候变化科学
背景情况:
- 淡水生态系统,特别是浅湖,是甲 (CH4) 的主要天然来源.
- 众所周知,轻化和变暖会增加湖泊CH4排放.
- 这些压力因素对甲氧化,即CH4的主要生物沉积点以及相关的微生物群落的影响尚不清楚.
研究的目的:
- 为了研究化,添加和变暖如何影响甲氧化细菌 (MOB) 丰富度,社区组成和湖泊沉积物中的甲氧化潜力.
- 在模拟的气候变化场景下了解甲氧化社区的动态.
主要方法:
- 利用了世界上运行时间最长的淡水气候变化中宇宙实验.
- 使用分子技术分析了MOB的丰富性和社区组成.
- 在沉积物样本中测量了甲氧化潜力.
主要成果:
- 添加增加了MOB的丰度和甲氧化潜力.
- 变暖增加了MOB的丰富性,但没有改变甲氧化潜力.
- 缩有利于I型MOB (甲基甲菌),而变暖有利于II型MOB (甲基囊) 而不是I型MOB (甲基甲菌).
- 变暖使MOB社区从I型主导转变为I型和II型的共同主导,改变了与生长和应激反应相关的特征.
结论:
- 欧化和变暖对浅湖的MOB社区产生了不同的影响.
- 在变暖下,转向增长较慢的MOB可能解释了MOB丰度和甲氧化潜力的不结合的增加.
- MOB社区的变化可能会改变浅层湖泊减轻甲排放的能力.
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