作为气候解决方案的保留林业:评估北方温带针叶树林中的生物质,土壤碳和白色影响
Kangyu So1, Cheryl A Rogers1, Yiyao Li1
1School of Earth, Environment & Society, McMaster University, Hamilton, Ontario L8S 4L8, Canada.
The Science of the total environment
|July 11, 2024
概括
变量保留收获 (VRH) 影响土壤的碳和,但分散的VRH可以最大限度地减少损失,促进森林生长和局部降温. 这使得分散的VRH成为首选的气候解决方案.
科学领域:
- 林业和环境科学 林业和环境科学
- 气候变化缓解缓解 气候变化缓解
- 生态系统管理 生态系统管理
背景情况:
- 变量保留收获 (VRH) 是一种以自然为基础的气候解决方案,正在获得引力.
- VRH的净生化和生物物理影响尚未完全理解.
- 评估VRH对营养循环,树木生长和当地气候的影响至关重要.
研究的目的:
- 研究森林稀疏密度和聚合对生态系统营养,树木生长和当地气候的影响.
- 评估VRH作为一个以自然为基础的气候解决方案在一个北方温带针叶树林.
- 确定最佳的VRH策略,以保持生态系统健康和气候效益.
主要方法:
- 结合近距离和卫星遥感.
- 采用了状共变率技术进行碳流量测量.
- 在地面进行了土壤碳和的生物识别测量.
主要成果:
- 与未收割的土地相比,VRH处理显著减少了土壤碳 (C) 和 (N).
- 在聚合VRH地块的开放区域中观察到最大的土壤C和N损失.
- 分散的VRH与较少的残留树木增强了树木的生长,地下C吸收,并通过增加的白度进行了局部冷却.
结论:
- 空间分散的VRH可以最大限度地减少土壤的C和N损失,同时促进地下树木的生长和碳吸收.
- VRH可以通过增加的白度对当地气候产生负面反,相当于显著的碳捕获.
- 分散的VRH,与精心管理采伐木材,以避免碳排放,是气候解决方案的首选森林管理途径.
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