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生态恢复和气候变化对草木和树木表现学的影响
Zixuan Yuan1,2,3, Yiben Cheng1,2,3, Lina Mi1,2
1Breeding Base for State Key Lab. of Land Degradation and Ecological Restoration in Northwestern China, Yinchuan 750021, China.
Plants (Basel, Switzerland)
|November 25, 2023
概括
中国霍尔金沙地植被现象学显示,生长季节的结束日期延迟,长度延长,受降水的影响. 这些变化凸显了气候变化的影响,并为生态恢复工作提供了信息.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 气候变化研究 气候变化研究
背景情况:
- 全球气候变化正在改变植被现象学,对脆弱的生态系统产生重大影响.
- 霍尔金沙地是中国最大的沙地区,表现出生态的脆弱性.
- 了解植被现象学转变对于预测气候变化影响和生态系统反应至关重要.
研究的目的:
- 调查2000-2021年霍尔金沙地植被现象学的变化 (生长季的开始,结束,长度).
- 分析植被现象学的时间变化及其与气象因素的关系.
- 在研究区域内比较森林和草原生态系统之间的现象学和微气候差异.
主要方法:
- 从2000年到2021年使用的时间序列规范差异植被指数 (NDVI) 数据.
- 采用了高阶曲线拟合方法来提取植被现象学指标 (SOS,EOS,LOS).
- 应用了部分相关性分析来评估现象学和气象因素 (温度,降水) 之间的关系.
主要成果:
- 在Horqin Sandy Land的植被现象学显示了22年来延迟季节开始 (SOS),延迟季节结束 (EOS) 和延长季节长度 (LOS) 的趋势.
- SOS主要受到4月降水的影响,而EOS受到8月降水的影响.
- 与草原相比,森林地区表现出较晚的EOS和较长的LOS,降水和土壤温度有所不同.
结论:
- 霍尔金沙地上的植被现象学发生了显著的变化,其特点是延迟的EOS,延长的LOS和明显的森林-草原差异.
- 这些现象学变化表明气候变化对该地区生态系统的明显影响.
- 结果为沙地土地的生态恢复和荒漠化预防策略提供了理论基础.
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