人类的压力和生物多样性改变了极端多年干旱后的森林弹性
Tianjing Wu1, Yanxu Liu2, Liangzhi Chen3
1State Key Laboratory of Earth Surface Processes and Disaster Risk Reduction, Faculty of Geographical Science, Beijing Normal University, Beijing, China.
Nature ecology & evolution
|March 4, 2026
概括
在多年干旱 (MYD) 之后,全球森林恢复力显著下降. 物种丰富度和人类压力是关键因素,突出了减轻人类对森林从极端气候事件中恢复森林影响的必要性.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 林业林业 林业 林业 林业
背景情况:
- 森林的弹性,即能够从干扰中恢复过来的能力,对于生态系统的稳定性至关重要.
- 越来越多的多年干旱 (MYD) 和人类压力威胁着全球森林生态系统.
- 极端干旱和人类对森林恢复能力的影响之间的相互作用仍然不太清楚.
研究的目的:
- 在多年干旱 (MYD) 之前和之后绘制全球森林弹性模式.
- 调查森林弹性空间变化的驱动因素.
- 评估人类压力对森林对极端干旱的抵御能力的影响.
主要方法:
- 利用了核正常化差异植被指数 (NDVI) 的时间自相关性来评估森林的弹性.
- 在全球森林中分析了适应力的空间模式.
- 量化了环境因素和人类足迹对性的影响.
主要成果:
- 超过70.9%的全球森林在重大多年干旱 (MYD) 后表现出降低的弹性.
- 物种丰富是弹性变化的主要驱动因素,其次是蒸汽压力赤字,温度和土壤湿度.
- 人类足迹始终对森林恢复力产生负面影响,管理森林的恢复力低于未受到干扰的森林.
结论:
- 缓解人类压力对于保持森林抵抗极端气候干扰 (如MYD) 的能力至关重要.
- 森林管理策略应考虑干旱和人为影响的综合影响.
- 了解物种丰富的相互作用是预测森林对气候变化的反应的关键.
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