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Updated: Jun 14, 2025
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高博尔尼亚森林的树冠干扰率高于亚马逊东部或圭亚那盾牌森林的树冠干扰率
Toby D Jackson1,2, Fabian J Fischer2, Grégoire Vincent3
1Conservation Research Institute and Department of Plant Sciences, University of Cambridge, Cambridge, UK.
Global change biology
|September 6, 2024
概括
热带森林面临着越来越多的干扰. 婆罗洲的高森林由于小的干扰而缩小了高度,与亚马逊和圭亚那稳定的盾树森林不同.
科学领域:
- 生态生态学 生态生态学
- 林业林业 林业 林业 林业
- 遥感 遥感 遥感 遥感
背景情况:
- 热带森林的动态对于气候调节至关重要.
- 预计气候变化将增加扰乱率.
- 监测森林生长和干扰需要高分辨率的大规模数据.
研究的目的:
- 开发和应用一个框架来分析热带森林中的干扰和恢复,使用空中LiDAR时间序列.
- 为了比较不同热带森林地区 (婆罗洲,亚马逊,圭亚那盾) 的生长率和干扰率.
- 为了研究干扰率,地形和最大树冠高度之间的关系.
主要方法:
- 利用空中LiDAR时间序列数据,以测量1米分辨率的树冠高度的景观尺度变化.
- 开发了一个强大的框架来分析LiDAR数据中的干扰和恢复过程.
- 在4-5年的时间里,将框架应用于8000公的老生长热带森林.
主要成果:
- 在亚马逊东部和圭亚那盾地区,干扰和增长平衡,保持稳定的平均树冠高度.
- 婆罗洲森林的平均树冠高度下降,原因是小规模的干扰超过了生长.
- 干扰率随着树冠最大高度的增加而增加,这表明更高的树木更容易受到干扰.
结论:
- 高大的热带森林是重要的碳汇,不成比例地容易受到气候变化引起的极端天气事件的影响.
- 森林管理和保护战略必须考虑干扰对不同高度森林的不同影响.
- 空载LiDAR时间序列为监测热带森林健康状况和预测未来变化提供了宝贵的工具.
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