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植被覆盖的动态及其对青海-西藏高原生态系统服务的约束作用在生态恢复项目下
1Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of environmental management
|March 13, 2024
概括
青海-西藏高原的生态恢复项目 (ERP) 改善了植被覆盖面和生态系统服务. 规范差异植被指数 (NDVI) 显示了这些好处的门,指导了未来的恢复工作.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 遥感 遥感 遥感 遥感
背景情况:
- 生态恢复项目 (ERP) 对于恢复全球退化生态系统至关重要.
- 青海-西藏高原 (QTP) 拥有独特的高山生态系统,最近的ERP旨在增加植被覆盖面.
- 评估ERP的生态效益和确定未来的实施规模需要强有力的评估方法.
研究的目的:
- 在ERP实施后使用规范差异植被指数 (NDVI) 趋势量化植被变化.
- 在ERP之前和之后评估四个关键生态系统服务 (防风侵蚀,土壤保留,水产,初级生产率 (NPP)) 的变化.
- 探索NDVI和生态系统服务之间的关系,确定NDVI作为ERP的潜在门.
主要方法:
- 通过使用遥感数据,量化了整个QTP的NDVI趋势.
- 生态系统服务指标的比较 (防风侵蚀,土壤保留,水产,核电站) 在ERP之前和之后的实施.
- 应用约束线方法来分析NDVI和生态系统服务之间的关系,确定关键的NDVI值.
主要成果:
- 在ERP后的QTP中,在21.80%的QTP中观察到显著的NDVI增加.
- 在2000年至2020年期间,平均生态系统总服务 (TES) 指数从0.269增加到0.285.
- 土壤保留和水产有所改善,而核电和防沙风暴略有下降;NDVI显著限制了风侵蚀保护和水产.
结论:
- 在QTP上,ERP显然有助于改善植被覆盖面和生态系统服务.
- NDVI作为生态系统服务响应的关键值指标,TES稳定在0.65-0.75.5之间的NDVI值.
- 结果为优化阿尔卑斯山地区可持续ERP的规模和实施提供了宝贵的见解.
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