在中国陆地生态系统中,上下生物量的空间分布模式和驱动因素
Yusen Chen1, Shihang Zhang2, Yongdong Wang1
1National Engineering Technology Research Center for Desert-Oasis Ecological Construction, Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences, Science Second Street, Urumqi 830000, China; University of Chinese Academy of Sciences, Yuquan Road, Beijing 100000, China.
The Science of the total environment
|June 12, 2024
概括
了解植被生物质是全球碳循环和生态系统可持续性的关键. 这项研究揭示了中国各地地面 (AGB) 和地下 (BGB) 生物质的显著空间变化,受气候和土壤因素的影响.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 生物地质化学生物地质化学
背景情况:
- 植物生物质对于了解全球碳循环和陆地生态系统可持续性至关重要.
- 评估生态系统的健康,生产力和结构依赖于准确的生物质数据.
- 现有的数据缺口阻碍了全面的生态和保护工作.
研究的目的:
- 分析中国地面 (AGB) 和地下 (BGB) 生物质的空间模式.
- 确定影响植被生物质分布的关键环境驱动因素.
- 为全球碳平衡和生态系统可持续性评估提供见解.
主要方法:
- 综合了来自中国4485个和3442个地点的AGB和BGB数据.
- 综合生物质数据与环境参数.
- 应用机器学习,差异分解和零碎结构方程建模.
主要成果:
- 在生物质分布中观察到显著的空间异质性,与南部和东北部地区相比,西北地区的生物质较低.
- 地表生物量 (AGB) 始终超过地下生物量 (BGB).
- 气候 (太阳辐射) 和土壤特性 (总) 是关键驱动因素,解释了53%的AGB变异和48%的BGB变异.
结论:
- 中国的植物生物质分布表现出显著的空间差异.
- 气候和土壤营养是AGB和BGB的主要决定因素.
- 这些发现有助于理解碳循环,生态系统的可持续性和应对全球变化的反应.
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