菲律宾明达那北部Macajalar湾的多十年红树林变化 (1950-2020年) 使用遥感和地理信息系统
Mary Jean D Salvaña1,2, Justin Rhea F Osa2, Gifford Jay L Agudo3
1School of Environmental Science and Management (SESAM), University of the Philippines Los Baños, Los Baños, Laguna, Philippines.
Environmental monitoring and assessment
|May 4, 2024
概括
马卡哈拉尔湾 (Macajalar Bay) 是一个海湾.
科学领域:
- 生态生态学 生态生态学
- 遥感 遥感 遥感 遥感
- 环境科学 环境科学
背景情况:
- 红树林是重要的沿海生态系统,提供基本服务.
- 马卡哈拉尔湾的红树林面临着肆虐的清理,需要准确的绘图来保护.
- 目前关于红树林的空间数据不足以理解历史变化动态.
研究的目的:
- 在Macajalar湾进行红树林变化动态的多十年监测.
- 利用历史植被地图和Landsat图像来评估过去70年来红树林的丧失.
- 为有效的红树林保护战略提供准确的空间信息.
主要方法:
- 对1950年的植被地图和Landsat卫星图像进行协同分析.
- 1950年至2020年期间,红树林覆盖面的变化量化.
- 评估红树林清除率和驱动因素的识别.
主要成果:
- 马卡贾拉尔湾的红树林覆盖面从1950年的325.43公减少到2020年的201.73公,净损失为324.29公.
- 1950年至1990年间的清算率最高 (每年6.46公),主要是由水产养殖推动的.
- 自2000年以来,由于植树而增加的红树林被最近种植的低树冠覆盖所抵消.
结论:
- 马卡哈拉尔湾的强化红树林清理导致旧生长森林的显著损失.
- 目前的红树林面积主要是二级森林,最近的增长表明树冠覆盖面积变化.
- 未来的保护需要评估原始红树林的生存能力,地点与物种的匹配以及生物物理评估.
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