人为干扰加剧了亚马逊雨林的弹性丧失
Huan Wang1,2,3, Philippe Ciais3, Stephen Sitch4
1College of Urban and Environmental Sciences, Peking University, Beijing, China.
Global change biology
|November 1, 2023
概括
人类干扰显著降低了亚马逊雨林的弹性,增加了过渡风险. 完整的森林比被破坏的森林具有更高的弹性,这凸显了限制森林砍伐的必要性.
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:
- 了解亚马逊森林的弹性对于预测生态系统对气候变化和人类活动的反应至关重要.
- 森林弹性变化受到环境驱动因素和人为压力之间的复杂相互作用的影响.
研究的目的:
- 调查人类干扰和环境因素对亚马逊森林恢复力的影响.
- 在巴西亚马逊地区使用实证指标量化森林弹性变化.
主要方法:
- 应用滞后-1个月时间自相关性 (TAC) 作为经验性弹性指标.
- 利用C频段的植被光学深度数据作为树冠水含量的代理.
- 分析了巴西亚马逊地区人类干扰和完整森林地区的数据.
主要成果:
- 人类干扰显著提高了亚马逊森林中关键转型的风险.
- 在受干扰的森林中,TAC的中位数约为2.4倍,这表明性明显较低.
- 与完整的森林相比,被破坏的森林对陆地表面的热量和大气中的水压力具有较低的弹性.
- 在受干扰地区内,树冠更密,森林覆盖更高的森林表现出更大的弹性.
结论:
- 人类干扰严重损害了亚马逊雨林的弹性,增加了对环境压力因素的脆弱性.
- 制森林砍伐和退化的政策干预对于维护森林弹性至关重要.
- 森林结构,特别是树冠密度和覆盖面,在扰乱地区的适应性中起作用.
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