总初级生产率的稳定性及其对中国气候变化的敏感性
Xiaojuan Xu1, Fusheng Jiao2, Jing Liu1
1Ecological Protection and Restoration Center, Nanjing Institute of Environmental Sciences, MEE, Nanjing, China.
Frontiers in plant science
|September 23, 2024
概括
中国中国中国中国.
科学领域:
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
- 环境科学 环境科学
背景情况:
- 了解陆地生态系统的稳定性和对气候变化的敏感性,对于开发基于自然的解决方案至关重要.
- 治理生态系统稳定性和敏感性的机制,特别是在多个保护项目的地区,需要进一步研究.
研究的目的:
- 量化总初级生产率 (GPP) 对中国主要气候变量的稳定性和敏感性.
- 评估重叠的生态项目对GPP稳定性和气候敏感性的影响.
主要方法:
- 采用曼-肯达尔趋势分析,稳定性分析和多重回归方法.
- 从1982年到2019年,分析了与温度,蒸汽压力赤字 (VPD),土壤水分和辐射有关的GPP数据.
- 研究了不同地区的GPP响应,不同地区有不同数量的重叠生态项目.
主要成果:
- GPP显示,中国东部稳定性较低的趋势呈上升趋势,中国西部和西南地区稳定性较高的趋势呈下降趋势.
- 在五个重叠的生态项目 (例如,谷物到绿色,自然森林资源保护) 的地区,GPP稳定性最高.
- 与水有关的因素 (VPD,土壤湿度) 在多个项目区域显著影响了GPP,而温度和辐射在项目较少的区域占主导地位.
- 中国西南部和东北部对气候变化的敏感性最高;东部沿海地区和西藏的敏感性较低.
- 洛斯高原拥有广泛的项目重叠,显示了日益增长的GPP趋势,高稳定性和低气候敏感性.
结论:
- 叠加的生态项目显著影响了GPP的稳定性和气候敏感性,与水有关的因素变得越来越占主导地位.
- 中国的陆地生态系统表现出不同稳定性和敏感性模式,受区域气候和保护努力的影响.
- 这些发现为了解生态系统的弹性和优化以自然为基础的解决方案以应对气候变化提供了基础.
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