对比喜马拉雅树木对未来气候的生长反应
Rupesh Dhyani1, Pablo Casas-Gómez2, Lea Schneider3
1Department of Geography, Justus-Liebig-University, Giessen, Germany; Govind Ballabh Pant National Institute of Himalayan Environment (NIHE), Kosi-Katarmal, Almora 263 643, Uttarakhand, India.
The Science of the total environment
|May 31, 2025
概括
喜马拉雅树木的生长显示了气候变化对抗的不同反应. 由于变暖,东方物种面临下降,而西方物种可能会从降水量增加中受益,这凸显了有针对性的森林管理的必要性.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 森林科学 森林科学 森林科学
背景情况:
- 全球变暖和降雨模式的变化对喜马拉雅树木生长产生了重大影响.
- 对于未来气候情景的区域和物种特异性反应在喜马拉雅的不同降水制度中尚不清楚.
研究的目的:
- 在喜马拉雅山脉量化区域和特定物种的树木生长对未来气候变化情景的反应.
- 分析树环宽度数据以预测各种代表性度路径 (RCP) 下的基底面积增量 (BAI) 趋势.
主要方法:
- 分析了来自14种主导的喜马拉雅树种 (海拔1750-4100米) 的3370个树环宽度时间序列.
- 应用线性混合模型 (LMM) 来预测不同温度和降水变化下的基底面积增量 (BAI) 趋势.
- 在四个代表性度路径 (RCP 2.6,4.5,6.0和8.5) 下建模.
主要成果:
- 预计到2100年,东喜马拉雅地区的物种 (例如,Cedrus deodara,Pinus roxburghii) 由于气候变暖引起的水分压力,BAI (23-67%) 将会下降.
- 西喜马拉雅地区的物种 (例如,Picea smithiana,Pinus wallichiana) 由于冬季/春季降水增加,预计BAI增幅高达100%.
- 在西喜马拉雅地区的物种中增加森林碳封存的潜力.
结论:
- 在喜马拉雅山脉,对抗气候变化影响需要特定区域的保护和适应性管理策略.
- 保护工作对于脆弱的喜马拉雅东部森林至关重要.
- 西喜马拉雅地区的适应性管理可以提高森林的适应性和可持续性.
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