与气候变化相比,中国干旱地区的植被变化与植林密切相关
Liang He1, Jianbin Guo1, Wenbin Yang2
1Key Laboratory of State Forestry Administration on Soil and Water Conservation, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China.
The Science of the total environment
|December 9, 2023
概括
造林大大提高了干旱地区的全年植被,特别是在中国. 土壤储水和蒸汽压力缺陷也会影响植被,植林是所有季节的主要驱动因素.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 干旱地植被对生态系统稳定至关重要,对气候变化和人类活动敏感.
- 对旱地植被季节性影响的定量理解仍然有限.
- 中国的干旱地区面临着严重的环境压力.
研究的目的:
- 调查降水,温度,土壤储水 (SWS),蒸汽压力赤字 (VPD) 和森林植被对干旱地区植被的影响.
- 确定这些因素在不同季节 (雨季,干季,过渡季和全年) 的相对贡献率.
- 为全球变暖下的干旱地区可持续管理提供见解.
主要方法:
- 使用第一差方法进行定量分析.
- 分析了中国干旱地区2001年至2020年间的数据.
- 在四个不同的时期评估影响:雨季 (RS),干季 (DS),过渡季 (TS) 和全年 (AY).
主要成果:
- 降水和SWS与植被呈正相关性,其影响在雨季更为明显,并且随着土壤深度的增加而增加.
- 增加的VPD在雨季对植被产生了负面影响.
- 森林植被显著增强了超过60%的干旱地区的植被,作为全年的主要驱动因素 (64.23%-71.46%的贡献).
结论:
- 森林植被是影响中国所有季节干地植被动态的主要因素.
- SWS和VPD对植被的间接影响 (通过降水和温度介导) 比直接的气候影响更为显著.
- VPD和SWS在调节植被方面发挥着至关重要的作用,它们的影响因土壤深度和季节而异,为有针对性的保护策略提供了信息.
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