全球分布和气候控制自然山脉树林线的全球分布
Xinyue He1,2, Xin Jiang1, Dominick V Spracklen2
1School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China.
Global change biology
|July 21, 2023
概括
气候变化影响了山脉树林,特别是闭环山脉树林 (CLMT). 在全球范围内,70%的CLMT在21世纪每年上升1.2米,热带地区的变化最快.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 地质科学 地质科学
背景情况:
- 山脉树林线是气候变化的敏感指标.
- 了解气候的影响是复杂的,因为混人类活动.
- 闭环山脉树林线 (CLMT) 提供了一个独特的机会来隔离气候影响.
研究的目的:
- 使用CLMT调查全球气候对山脉树林的影响.
- 建立一个全面的CLMT数据库.
- 区分气候驱动因素与人类对树林线动态的压力.
主要方法:
- 全球检测和绘制243个山脉中CLMT的地图.
- 分析树木线高度分布与度和海岸附近关系的分析.
- 统计建模,以确定树线位置的气候驱动因素 (温度,降雨).
- 在21世纪的第一个十年中,对CLMT的时间分析发生了变化.
主要成果:
- 确定了一个~916,425公里的全球CLMT网络.
- 树林线的高度呈现双模度分布,并随着距离海岸的距离而增加.
- 温度主要驱动北极/热带地区的树林线;在温带地区的降水.
- 70%的CLMT显示上升转移 (平均1.2m/年),热带地区的转移速度最快 (平均3.1m/年).
结论:
- CLMT为评估气候变化对山区生态系统的影响提供了可靠的代理.
- 这项研究强调了全球树林线上气候驱动的显著上升变化.
- 这些发现对生物多样性,资源管理和生态系统适应策略有重大影响.
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