在北极森林中沿着景观梯度的生长现象学和气候生长反应之间的联系
Jan Tumajer1, Jan Altman2, Jiří Lehejček3
1Department of Physical Geography and Geoecology, Faculty of Science, Charles University, Albertov 6, 12843 Prague, Czech Republic.
The Science of the total environment
|September 20, 2023
概括
玻里亚森林是重要的碳汇. 树木生长对气候的敏感性因高度而异,影响气候变化缓解策略. 了解这些变化对于预测森林反应至关重要.
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:
- 玻里亚森林是关键的碳汇,影响气候变化减缓.
- 树环宽度反映了气候变化,包括休眠和前季节的滞后影响.
- 了解气候增长敏感性的景观层面变化是有限的.
研究的目的:
- 评估北极种群在树环形成前45个月的气候增长反应.
- 调查成长灵敏度如何随着高度和坡度而变化.
- 将增长现象学与跨景观梯度的气候增长关系联系起来.
主要方法:
- 利用基于过程的木材形成建模和遥感数据.
- 确定了九个北极种群 (Picea glauca和Picea mariana) 的生长表态.
- 分类的年内季节与气候与生长有显著的相关性.
主要成果:
- 现象学和气候与生长关系随着树林线的高度和斜率方向而系统地转移.
- 生长季节的持续时间从树林100天到低地160天不等.
- 树林生长应对了当前和前一年的夏季温度,而低地生长则有利于更温暖的休眠期,但受到前期夏季高温的限制.
结论:
- 生长现象学,特别是接近树林线,决定了气候生长敏感性的时间.
- 在生长现象学中考虑景观梯度对于在气候变化下升级北极森林生长极限至关重要.
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