西班牙国家公园网络的长期植被动态:远程传感数据的见解
Magí Franquesa1,2, Maria Adell-Michavila3,4, Sergio M Vicente-Serrano3,4
1Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), 50059, Zaragoza, Spain. magi.franquesa@ipe.csic.es.
Environmental monitoring and assessment
|June 18, 2025
概括
西班牙西班牙西班牙西班牙西班牙
科学领域:
- 生态与环境科学 生态与环境科学
- 遥感和地理空间分析
- 保护生物学 保护生物学
背景情况:
- 长期的植被动态对于理解生态系统的弹性和指导保护工作至关重要.
- 保护区对生物多样性至关重要,但面临着气候变化和人类活动带来的压力.
- 随着时间的推移,评估植被健康状况对于有效管理这些有价值的生态系统至关重要.
研究的目的:
- 从1984年到2023年,分析西班牙国家公园网络的植被趋势.
- 识别植被活动及其驱动因素的空间和季节性变化.
- 评估当前保护策略的有效性,并告知适应性管理.
主要方法:
- 利用通过谷歌地球引擎处理的Landsat卫星图像进行全面覆盖.
- 计算多个植被指数 (NDVI,SAVI,kNDVI,NDMI) 来评估植被状况.
- 应用曼-肯达尔和泰尔-森统计试验来检测和量化植被趋势.
主要成果:
- 在40多年来,西班牙大多数国家公园都观察到植被活动的占主导地位.
- 与地形,气候和植被类型相关的趋势存在显著的空间和季节性变化.
- 在湿地公园 (如Las Tablas de Daimiel) 发现的负面趋势表明了水文压力和脆弱性.
结论:
- 高分辨率遥感对于保护区的长期生态监测至关重要.
- 植被趋势有很大的差异,需要针对不同类型的公园量身定制的管理方法.
- 将遥感与现场数据相结合,对于基于证据的气候变化保护至关重要.
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