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森林小块和景观规模的碎片化加剧了亚马逊地区森林火灾的蔓延

Ciar D Noble¹, James J Gilroy¹, Carlos A Peres²

¹School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, Norfolk, NR4 7TJ, UK.

Journal of environmental management

|January 25, 2025

概括

森林碎片化显著增加了热带森林火灾,特别是在小而复杂的区域. 减少碎片化和管理牧场转型是减轻火灾蔓延和保护亚马逊地区的关键.

科学领域:

生态生态学生态生态学
环境科学环境科学
林业林业林业林业林业

背景情况:

热带森林火灾正在增加,这是由景观规模因素驱动的.
了解这些驱动因素对于保护和减缓气候变化至关重要.
亚马逊是一个重要的碳汇,面临着不断升级的碎片化和火灾风险.

研究的目的:

调查森林碎片化,土地使用和亚马逊森林火灾发生之间的关系.
确定影响火灾发生率的关键景观和补丁级变量.
为减少该地区森林火灾发生率的战略提供信息.

主要方法:

利用了MapBiomas的土地覆盖和火灾痕数据 (1985-2021年).
采用零/零-一个膨胀的Beta回归来分析火灾发生和密度.
检查了森林块的特征 (面积,形状,周围覆盖面) 和景观变量 (边缘长度,土地覆盖组成).

主要成果:

火灾密度在小 (≤100公),复杂的森林区域中最高,这些森林占据着火灾覆盖的大部分.
景观规模分析显示,森林边缘的长度,城市覆盖面和火灾发生/密度之间存在积极的关联.
火灾的可能性在牧场覆盖率的45%左右达到顶峰,密度与牧场线性增加;耕地覆盖率显示出负相关性.

结论:

证明了森林碎片化与亚马逊森林火灾蔓延率增加之间的明显联系.
强调迫切需要制碎片化,以保护亚马逊的碳汇能力.
建议的策略包括尽量减少碎片化,将牧场转化为作物,并在脆弱地区有针对性的灭火.

关键词:

贝塔回归的贝塔回归巴西巴西巴西巴西.生态系统的易燃性森林边缘的森林边缘.土地使用情况.景观配置景观配置牧场牧场牧场牧场牧场

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