生态系统生产率的非线性动态及其干旱地区的驱动机制:埃比努尔湖盆地的案例研究
Luchen Wang1, Haiyan Li2, Zhenzhou Zhu3
1School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Water Cycle Field Station of the Heihe River Basin, CGS, Zhangye, 734023, China; National Key Laboratory of Smart Farm Technologies and Systems, Harbin, Heilongjiang, 150030, China.
Journal of environmental management
|May 16, 2025
概括
由于气候变化,干旱的生态系统显示了原始生产率 (GPP) 的非线性变化. 蒸汽压力赤字是关键的驱动因素,但气温的升温有助于中国Ebinur湖盆地的恢复.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 遥感 遥感 遥感 遥感
背景情况:
- 干旱地区的生态系统对气候变化和人类的影响非常敏感,表现出非线性反应.
- 中国西北干旱地区的埃比努尔湖盆地是典型的内陆盆地研究区域.
- 了解这些非线性动态对于有效的生态系统管理至关重要.
研究的目的:
- 为了研究毛初级生产率 (GPP) 的非线性变化特征.
- 确定埃比努尔湖盆地GPP变化的潜在驱动机制.
- 分析干旱生态系统中的临界点及其时间分布.
主要方法:
- 利用了长期的遥感和气象数据 (1982-2018).
- 采用了改进的BFAST算法和XGBoost-SHAP分析框架.
- 应用部分最小平方结构方程建模 (PLS-SEM) 来确定驱动因素.
主要成果:
- 在99.78%的Ebinur湖盆地检测到GPP变化的临界点.
- "负逆转" (增加然后减少) 是最常见的GPP转折点类型 (35.91%).
- 蒸汽压力缺陷 (VPD) 是主要的GPP控制器,但温度在恢复生态系统中占主导地位.
结论:
- 干旱的生态系统表现出广泛的非线性GPP动态和临界点.
- VPD是主要的驱动因素,但温度对于生态系统恢复和生产力恢复至关重要.
- 这些发现为气候变化下的干旱区生态系统适应性管理提供了科学基础.
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