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生态系统的时空模式和控制机制整个蒙古高原的碳使用效率

Xinyi Liu¹, Quan Lai², Shan Yin²

¹College of Geographical Science, Inner Mongolia Normal University, Hohhot 010022, China.

The Science of the total environment

|October 20, 2023

概括

蒙古高原的碳利用效率 (CUE) 呈现下降趋势,受气候和人类活动的影响. 了解这些因素是干旱地区生态系统管理的关键.

科学领域:

生态生态学生态生态学
环境科学环境科学
遥感遥感遥感遥感

背景情况:

碳利用效率 (CUE) 对生态系统的碳储存和气候反至关重要.
蒙古高原等干旱和半干旱地区对气候变化敏感,需要了解CUE.
影响CUE及其对气候和人类活动的反应的相互作用是不太了解的.

研究的目的:

为了研究蒙古高原CUE的时空空间模式.
确定影响CUE的控制机制和相互作用因素.
评估气候变化和人类活动对CUE的影响.

主要方法:

使用多源遥感数据生成的CUE数据.
从2000年到2018年分析了CUE的时空趋势.
量化了气候,土壤和植被因素对CUE的影响,包括相互作用.

主要成果:

从2000年到2018年,CUE呈现了轻微下降的趋势,干冷地区的价值较高,潮湿温暖地区的价值较低.
生物群特定的CUE排名:草原 > 沙植被 > 耕地 > 灌木 > 森林.
降水量 (PPT),可用水指数 (IWA),pH和土壤有机含量 (SOC) 是关键驱动因素,观察到协同效应. 气候因素通常超过了土壤因素,除了高山草地.
气候变化和人类活动的综合影响占CUE下降的68%.

结论:

气候因素,特别是PPT和IWA,显著影响CUE,协同相互作用增强了解释能力.
CUE的下降主要是由于气候变化和人类活动的联合影响.
干旱地区有效的生态系统管理和保护必须考虑气候变化和人类干扰.

关键词:

碳使用效率的碳使用效率.气候因素气候因素控制机制控制机制控制机制蒙古高原是蒙古的高原.土壤变量的变量

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