动物生物化显著提高了西藏阿尔卑斯山草原的年度甲吸收
Dezhao Gan1, Dongsheng Yu1,2, Hongchao Zuo1
1College of Atmospheric Sciences, Lanzhou University, Lanzhou, People's Republic of China.
Global change biology
|July 9, 2025
概括
西藏高山草原上的动物生物化显著增加了甲的吸收,主要是在生长季节. 这一过程与土壤水分减少和甲类植物活动增加有关,影响全球甲循环.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 西藏高山草原 (AG) 是重要的甲 (CH4) 沉.
- 由于气候变化和人类活动而导致的AG降解增加了地下动物种群.
- 动物的生物流会影响土壤的特性,但其对CH4吸收的影响尚不清楚.
研究的目的:
- 调查动物生物流对西藏AG的CH4吸收的影响.
- 为了阐明驱动CH4流量变化的机制,由动物介导.
- 为了比较全球不同草原类型的CH4流量.
主要方法:
- 在高原zokor山丘 (ZM) 和健康草原 (HM) 补丁上进行了全年配对的CH4流量测量.
- 对西藏AG,温带草原 (TG) 和热带草原 (TrG) 进行了CH4流量的元和合成分析.
- 分析了土壤水分和功能基因丰度 (pmoA).
主要成果:
- 动物生物化显著增加了西藏AG每年CH4吸收的两倍.
- 由于生物化,CH4吸收的净增加在很大程度上是在生长季节观察到的.
- 上层土壤湿度下降和pmoA基因丰度增加与动物生物流相关.
- 热带草原的CH4吸收量低于温带和高山草原,这是由于降水量和土壤水分的增加.
结论:
- 动物生物流在提高高山草原中CH4吸收方面发挥着重要作用.
- 土壤湿度是影响全球CH4沉降变化的关键因素.
- 长期监测对于了解气候敏感生态系统中生物化的生态后果至关重要.
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