陷入困境,但勃发展:多型冷岩社区对冰川元素循环的影响
Runa Antony1, Dattatray Mongad2, Aritri Sanyal3
1National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Vasco-da-Gama, India; GFZ German Research Centre for Geosciences, Potsdam, Germany.
The Science of the total environment
|May 16, 2024
概括
冰岩洞是冰川上的微生物生态系统,驱动元素循环. 这些南极和喜马拉雅迷你生态系统支持不同的新陈代谢和营养循环,影响下游出口.
科学领域:
- 冰川学和地质微生物学
- 微生物生态学 微生物生态学
- 生物地质化学循环的过程
背景情况:
- 冰岩洞是冰川表面的独特水生环境,充当微生物生命和生物地化学过程的热点.
- 这些环境在从冰川向下游生态系统运输碳,营养素和微量元素方面发挥着至关重要的作用.
- 了解微生物群落及其在冷矿洞中的功能对于评估冰川对区域和全球元素预算的影响至关重要.
研究的目的:
- 研究不同环境 (南极和喜马拉雅山) 的冷矿洞内的功能性微生物多样性.
- 描述这些冰川生态系统中碳,,硫和铁循环的代谢潜力.
- 评估冷矿洞的自我维持性及其对下游元素流的影响.
主要方法:
- 碳和循环基因的有针对性的amplicon测序.
- 功能推断方法来预测微生物的代谢能力.
- 在南极和喜马拉雅的冷矿洞之间对微生物群落和功能进行比较分析.
主要成果:
- 鉴定了各种光合作用微生物 (斯特拉门皮尔,蓝藻,蛋白质菌).
- 喜马拉雅的冷岩石显示出更高的碳水化合物,氨基酸和脂质代谢潜力,有机碳比南极大约2倍.
- 预测了完全的硫和铁循环潜力,在喜马拉雅山脉增强了硫循环.
- 南极冷石表现出强大的固能力,弥补了低酸盐.
- 甲原和甲变性古生物/细菌的共存表明了完全的甲循环.
- 微生物群的存在表明,冷矿洞内存在复杂的食物网.
结论:
- 冰石洞中存在具有多样化代谢功能的自我维持的微生物生态系统.
- 这些冰川迷你生态系统显著影响关键元素循环 (碳,,硫,铁).
- 冰岩洞在控制冰川元素的出口方面发挥着至关重要的作用,影响下游环境.
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