分析长兴岛生态环境质量的时间和空间变化,使用优化的遥感生态指数
Yuanyi Zhu1,2, Yingzi Hou1,2, Fangxiong Wang1,2
1School of Geographical Sciences, Liaoning Normal University, No. 850, Huanghe Road, Dalian 116029, China.
Sensors (Basel, Switzerland)
|April 28, 2025
概括
岛屿生态系统面临着气候变化和城市化带来的威胁. 长兴岛是长兴岛的一个岛屿.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 生态生态学 生态生态学
背景情况:
- 岛屿生态系统至关重要,并日益受到全球气候变化和快速城市化的威胁.
- 保护和恢复这些独特的环境是全球优先事项.
研究的目的:
- 量化自2000年以来在中国大连长兴岛的生态变化.
- 分析土地利用转型,海岸线演变及其驱动因素.
- 评估岛屿生态环境的整体质量.
主要方法:
- 使用谷歌地球引擎 (GEE) 和遥感技术.
- 开发了一个岛屿遥感生态指数 (IRSEI),集成NDVI,WET,LST,M-NDBSI和LUI.
- 从2002年到2022年分析了土地使用和海岸线变化.
主要成果:
- 观察到重要的土地利用变化:耕地减少,由于城市化而增加建筑面积.
- 海岸线的长度平均每年增加2.15公里,主要是由于修复和建设.
- 生态质量明显恶化:优秀地区从39.3%下降到8.89%,而贫困/非常贫困地区扩大.
结论:
- 城市化加剧和海岸线开发对兴岛的生态系统构成重大风险.
- 优化的IRSEI有效地监测了长期的生态质量变化.
- 迫切需要采取保护战略,以减轻岛上生态系统的退化.
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