腐烂的帕尔萨沼泽中的碳和微生物与泥炭地和更广泛的连接的亚北极河流系统不同
Nea Tuomela1, Samu Elovaara2, Jenni Hultman3
1Faculty of Biological and Environmental Sciences, University of Helsinki, Viikinkaari 1, 00790 Helsinki, Finland.
ISME communications
|January 7, 2026
概括
气候变化影响北方的泥炭地. 帕尔萨永久土融池出口溶解有机碳 (DOC) 类似于泥炭地,但显示出更高的本地DOC加工和独特的微生物群落.
科学领域:
- 环境科学 环境科学
- 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:
- 北方的泥炭地和永久土地区储存了大量的陆地碳.
- 气候变化正在改变这些敏感生态系统中的碳和营养循环.
- 侧向碳转移,特别是在小流域,对于了解碳预算至关重要,但仍未得到充分研究.
研究的目的:
- 调查降解Palsa永久土泥和解泥土对亚北极水域的影响.
- 了解溶解有机物 (DOM) 和相关微生物群落的质量和数量.
- 为了比较不同分类的碳出口和加工.
主要方法:
- 实地采样在一个亚北极水域,有不同的分水域 (帕尔萨沼泽和泥炭地).
- 测量溶解有机物 (DOM) 度和质量.
- 使用分子技术分析微生物群落组成.
主要成果:
- 与泥炭地池相比,帕尔萨融池的DOM度更高,DOM芳香度更高.
- 在帕尔萨池中发现了不同的微生物群落.
- 在帕尔萨和泥炭场地之间,溶解有机碳出口率相似,但在帕尔萨场地,DOM加工率更高.
- 在所有采样水中,超小的Patescibacteria主导着微生物群落.
结论:
- 帕尔萨永久土的退化显著影响了流域的生物地球化学,创造了独特的水生环境.
- 帕尔萨沼泽作为DOM加工的热点,尽管可比碳出口到泥炭地.
- 微生物群落,特别是Patescibacteria,在这些亚北极系统中的碳循环中发挥着重要作用.
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