在过去十年中,巴西南部和东南部的红树林变化使用太空光学和SAR图像
João Paulo N Lopes1,2, Wilson R Nascimento2, Cesar G Diniz3
1Universidade Federal do Pará, Instituto de Geociências, Rua Augusto Correa, 1, 66075-110 Belém, PA, Brazil.
Anais da Academia Brasileira de Ciencias
|December 21, 2023
概括
使用遥感测绘巴西红树林的地图显示,在2008年至2016年期间,大约有34平方公里的巨额损失. 基于地理对象的图像分析 (GEOBIA) 证明了对监测这些重要的热带生态系统的有效性.
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:
- 热带和亚热带地区,包括红树林息地,由于持续的云层覆盖,很难绘制地图.
- 遥感技术为分析和监控这些动态环境提供了先进的功能.
- 了解红树林的动态对于沿海地区管理和保护工作至关重要.
研究的目的:
- 从2008年到2016年,绘制红树林分布图并检测巴西南部和东南部地区的变化.
- 评估基于地理物体的图像分析 (GEOBIA) 对于红树林绘图和变化检测的有效性.
- 在指定期间量化红树林面积变化,包括收益和损失.
主要方法:
- 利用了多传感器遥感数据,用于2008-2016年期间.
- 基于对象的应用地理图像分析 (GEOBIA) 用于图像分类和映射.
- 通过使用混矩阵统计数据 (全球准确性,卡帕和陶指数) 进行了变化检测分析并评估了分类准确性.
主要成果:
- 红树林面积从2008年的823.03平方公里减少到2016年的789.00平方公里,这表明净损失约为34平方公里.
- 变化检测显示总增长138.21平方公里,总损失172.24平方公里,以及650.79平方公里不变的红树林面积.
- 2008年,GEOBIA实现了高分类准确率:全球准确率为0.92,0.84卡帕和0.84;2016年全球准确率为0.93,0.86卡帕和0.86.
结论:
- 吉奥比亚是一种高效的方法,用于绘制红树林地区的地图,并以极高的准确度分析它们的动态.
- 该研究强调了巴西南部和东南部地区大量的红树林丧失,强调了需要保护战略的必要性.
- 一致的方法方法允许在不同地区对红树林生态系统进行可靠的比较和监测.
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