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垃圾和根投入对土壤CH₄吸收率的影响以及自然温度亚山林中相关的微生物丰度

Jia Xiong¹, Genxu Wang², Xiangyang Sun²

¹Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China.

The Science of the total environment

|November 25, 2023

概括

气候变化影响土壤的甲 (CH4) 吸收. 减少根源输入显著降低了CH4的吸收,而不是改变植物垃圾,这表明根源是亚山森林的关键调节者.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态生态学生态生态学

背景情况:

气候变化通过改变植物垃圾和根投入影响陆地生态系统.
这些变化对土壤甲 (CH4) 吸收的影响及其潜在机制仍然不太清楚.

研究的目的:

研究地面植物垃圾和根源投入的变化如何影响土壤CH4吸收率.
阐明推动这些变化在亚山林生态系统中的机制.

主要方法:

进行了一项为期三年的Detritus Input and Removal Treatment (DIRT) 研究,该研究是在宽叶和针叶亚山林中进行的.
应用了六种治疗方法:控制,除,双,根除,根除加除,根除加双.

主要成果:

所有的亚山林土壤都充当了CH4的沉地,宽叶森林的吸收率高于针叶树林.
根除显著降低了CH4的吸收,而双减少了它,而除增加了它.
根部排斥对CH4吸收的影响要大于垃圾操纵,这与土壤水,营养度,溶解有机碳和甲类植物丰度的变化有关.

结论:

根源输入的变化,特别是减少,对土壤CH4吸收的影响比寒冷,潮湿的亚山林中的地面垃圾变化更大.
了解这些机制对于预测生态系统对未来气候情景的反应至关重要.

关键词:

在detritus输入中进行操作.甲原体的产生甲类植物 (Methanotroph) 是一种甲类植物.土壤CH(4) 的吸收率.亚阿尔卑斯山的森林亚阿尔卑斯山的森林

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