在不同的森林恢复方法下,碳积累的动态模式和驱动因素
Tao Wang1, Lingbo Dong1, Zhaogang Liu1
1Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, College of Forestry, Northeast Forestry University, Harbin, 150040, PR China.
Journal of environmental management
|May 6, 2025
概括
森林恢复有助于增强碳储存,但结果因方法而异. 再造林显示出比自然回收更高的碳增量,初始碳储量是积累的关键驱动因素.
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:
- 森林恢复是缓解气候变化的关键基于自然的解决方案.
- 了解恢复森林中的碳积累动态和驱动因素至关重要,但量化程度不佳.
- 跨不同恢复策略的碳储存的时间轨迹和机制需要详细分析.
研究的目的:
- 分析各种森林恢复方法中的多十年碳储存动态.
- 阐明将碳积累模式与驱动因素和管理遗产联系在一起的机制.
- 为了比较重新造林和自然回收之间的碳积累率.
主要方法:
- 利用时间序列框架分析了26年的碳储存数据.
- 在老生长森林 (OF),二级森林 (SF),再造林 (RF) 和自然恢复 (NR) 中比较碳动态.
- 采用结构方程建模 (SEM) 来识别碳库存变化 (ΔC库存) 的关键调节者.
主要成果:
- 旧生长的森林保持了一致的碳积累,而二级森林显示了可变的收益和损失.
- 与自然恢复 (0.2-0.6 Mg C ha-1 yr-1) 相比,重新造林带来了显著更高的碳增量 (1.3-2.7 Mg C ha-1 yr-1),而不是自然恢复 (0.2-0.6 Mg C ha-1 yr-1).
- 最初的碳库存是碳库存变化的主要调节者;树木多样性和树结构影响了随时间的积累,树木大小的影响取决于环境.
结论:
- 优化森林恢复中的碳积累需要与特定的保护和恢复目标相一致的定制战略.
- 管理遗产和初始条件显著影响长期碳封存潜力.
- 了解诸如树木多样性,树结构和初始碳库存等驱动因素的相互作用,对于通过森林恢复有效减缓气候变化至关重要.
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