The use of remote sensing tools for mangrove monitoring is currently a strategy used to preserve this important coastal vegetation type. However, the temporal resolution of most satellite imagery limits the analysis of seasonal changes. Here, seasonal trend analysis (STA) was performed using an enhanced vegetation index (EVI) monthly time series (2005–2016) edited from MOD13Q1 products (MODIS Terra), to detect changes in mangrove cover in Sinaloa State in northwestern Mexico. The results were compared with a baseline map derived from a post-classification comparison of two mangrove distribution maps of 2005 and 2015. The STA procedure enabled the identification of mangrove canopy seasonal cycles, with open canopies between May and July and closed canopies from August to October. It was also possible to detect annual and long-term changes in canopy, with positive trends observed in most of Sinaloa’s mangrove ecosystems, which partially agree with the post-classification comparison results. Despite their coarse resolution, using the MODIS EVI products proved to be useful to confidently detect short- and long-term changes in mangrove cover, particularly in large ecosystems. Consequently, land use change analyses using these inputs could help to take actions related to mangrove cover management, considering the trends of change in this vegetation type.

中文翻译：

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基于增强植被指数（EVI）数据的时间序列，评估墨西哥西北部锡那罗亚州的季节性和长期红树林冠层变化

目前，将遥感工具用于红树林监测是一种保护这一重要沿海植被类型的策略。但是，大多数卫星图像的时间分辨率限制了对季节变化的分析。在这里，使用从MOD13Q1产品（MODIS Terra）编辑的增强植被指数（EVI）每月时间序列（2005-2016）进行了季节性趋势分析（STA），以检测墨西哥西北部锡那罗亚州的红树林覆盖率变化。将结果与基线图进行比较，该基线图来自对2005年和2015年的两个红树林分布图进行分类后比较得出的结果。STA程序可以识别红树林冠层的季节周期，其中5月到7月之间为开放冠层，8月到8月为封闭冠层。十月。还可以检测到冠层的年度和长期变化，在锡那罗亚州的大多数红树林生态系统中都观察到了积极的趋势，这在一定程度上与分类后的比较结果一致。尽管分辨率很低，但事实证明使用MODIS EVI产品对于自信地检测红树林覆盖率的短期和长期变化（特别是在大型生态系统中）很有用。因此，考虑到这种植被类型的变化趋势，利用这些输入进行的土地利用变化分析可能有助于采取与红树林覆盖管理有关的行动。