植被动态及其驱动力在青海湖盆地,中国
Jiesheng Sun1, Yuanyuan Ding1, Yong Wang2
1School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China.
Frontiers in plant science
|November 6, 2025
概括
由于气候变化和人类活动,青海湖盆地的植被覆盖面正在增加. 地形影响植被分布,在特定的高度,降水和温度范围内找到最佳条件.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
背景情况:
- 青海湖盆地是青海-西藏高原上一个关键的内系统,面临着复杂的植被动态.
- 以前的研究往往忽视了气候,地形和影响植被覆盖的人类活动之间的协同作用.
研究的目的:
- 分析2001-2022年青海湖盆地部分植被覆盖 (FVC) 的时空动态.
- 研究气候,地形,人类活动和土壤对植被覆盖的影响.
- 量化这些驱动因素对FVC的相互作用影响和途径.
主要方法:
- 利用MODIS-EVI数据来估计FVC和分析时空趋势.
- 使用地理探测器和部分最小平方结构方程模型 (PLS-SEM) 来评估驱动因素的影响和相互作用.
- 研究了地形元素对气候植物关系的监管作用.
主要成果:
- 部分植被覆盖 (FVC) 在整个盆地显示出显著的增长趋势 (1.38×10-3/a),低度FVC地区的波动性很高.
- 地形显著影响FVC分布,高峰在3500-3800米之间,随着斜率的增加而增加,并有利于半阴影/阴影方面.
- 气候因素 (温度和降水) 具有直接的积极影响,在温度较为主导的情况下协同作用. 地形通过水和热调节间接调节FVC. 对于海拔,降水和温度存在最佳范围,超出这些范围,FVC被抑制. 气候变化和人类活动是主要的驱动因素,人类积极影响正在增强.
结论:
- 青海湖流域的植被覆盖面正在改善,主要是由于气候变化和越来越积极的人类活动.
- 地形因素通过调解气候条件发挥着关键的间接作用,突出了在植被研究中考虑地形的重要性.
- 了解复杂的相互作用和驱动因素的最佳范围对于该地区有效的植被管理和保护至关重要.
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