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气候变暖下的边缘地区种植园的乐观增长:评估不同的干旱抵御能力

Jitang Li^1,2, Yuyang Xie¹, Jesús Julio Camarero²

¹The MOE Laboratory for Earth Surface Processes, Institute of Ecology, College of Urban and Environmental Science, Peking University, Beijing, China.

Global change biology

|August 20, 2024

概括

中国中国中国中国.

科学领域:

林业和生态林业和生态
适应气候变化适应气候变化
登德罗年代学登德罗年代学

背景情况:

全球变暖需要气候变化缓解策略,如植树造林.
自20世纪70年代以来,中国的广泛植树计划支持其2060年碳中和目标.
半干旱地区面临着种植园可持续性的独特挑战.

研究的目的:

分析在半干旱的中国北部种植的关键针叶树和宽叶树的生长适应性.
比较辐射增长趋势和种植园干旱反应 (1980-2018).
在气候变化场景下,预测未来种植园的生长和弹性.

主要方法:

对Pinus sylvestris var.的辐射生长进行了登德罗年代分析. 蒙古,Pinus tabulaeformis,Populus spp. 和罗宾亚伪木.
增长趋势和对极端干旱的反应的比较.
评估影响生长和弹性因素 (树木年龄,树密度,气候变量).

主要成果:

大多数种植园表现出增长,但宽叶植物最近出现下降,可能是由于年龄和土壤水分.
针叶树表现出更好的抗旱能力,而宽叶树则表现出优异的干旱后恢复.
针叶树的生长与温度和降水相关;宽叶树的生长与温度相关.
干旱前的生长和树木的年龄对弹性产生了负面影响;干旱后的降雨有助于恢复.

结论:

半干旱地区的种植园显示出一般的可持续性,但未来更温暖,更干燥的条件会带来风险.
针叶树和宽叶树表现出不同的干旱策略 (抵抗与恢复).
在预计的气候变化下,森林健康和碳汇潜力可能是不确定的.

关键词:

三北庇护森林计划抗旱能力抗旱能力增长趋势增长趋势种植园种植园种植园种植园树环分析的分析

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