An Unvegetated to Vegetated Ratio (UVVR) for coastal wetlands of the Gulf of Mexico Coast - 1986

Prior research has shown that sediment budgets, and therefore stability, of microtidal marsh complexes scale with areal unvegetated to vegetated marsh ratios (UVVR) suggesting these metrics are broadly applicable indicators of microtidal marsh vulnerability. This effort has developed the UVVR metric using readily available satellite imagery for the coastal areas of the contiguous United States (CONUS). These datasets provide annual averages of the 1) unvegetated fraction, 2) vegetated fraction, 3) water fraction and 4) an unvegetated to vegetated ratio (UVVR) at 30-meter resolution over the coastal areas of the contiguous United States for the year 1986. Additionally, multi-year average values of vegetated ratio, its standard deviation and a UVVR based on the annually-averaged vegetated ratio are provided for the coastal wetlands of the contiguous United States.

已有研究表明，微潮沼泽复合体的沉积物收支及其稳定性，随区域尺度上无植被覆盖沼泽与有植被覆盖沼泽的比值（Unvegetated to Vegetated Marsh Ratio，UVVR）呈比例变化，这提示该指标可作为微潮沼泽脆弱性的通用监测指标。本研究利用易获取的卫星影像，为美国本土（Contiguous United States，CONUS）沿海区域构建了UVVR指标体系。本数据集提供了1986年美国本土沿海区域30米分辨率下的四项年度平均值指标，分别为1）无植被覆盖占比、2）有植被覆盖占比、3）水体占比，以及4）无植被覆盖沼泽与有植被覆盖沼泽的比值（UVVR）；此外，数据集还为美国本土沿海湿地提供了多项多年平均衍生指标，包括基于年度平均植被占比计算得到的多年平均植被占比、该占比的标准差，以及基于该年度平均植被占比得到的UVVR值。