Dataset: Live area and NDVI measurements

For Landsat NDVI composites: Years with severe cloud cover were removed from the dataset resulting in the exclusion of 1990 and 2003. Images were transformed to Normalized Difference Vegetation index (NDVI) following Chander, et al. [22] by USGS. We used coordinates from handheld GPS units to create an outline of the die-off area as a shapefile using ArcMap 10.3.1. This shapefile was checked against a basemap of the Caribbean produced by the U.S Geological Survey (USGS) and high-resolution imagery from WorldView-2 (http://www.satimagingcorp.com/satellite-sensors/worldview-2/). Annual NDVI composites from each year were clipped to the shapefile in ArcMap 10.3.1. NDVI was reclassified into five categories (Table I). Area of each reclassified NDVI category was calculated for every year in the die-off region using R (version 3.4.1). NDVI values categorized as yellow and pale yellow (0.2-0.5, 0.5-0.7, respectively) were considered as live mangrove. Historical hurricane tracks were filtered such that only storms that directly passed over Abaco Island between 1984 and 2013 were included in our study (Table II). We constructed a time series of live mangrove vegetation cover and of maximum annual NDVI from 1989-2013 in R (version 3.4.1). Maximum annual NDVI was chosen to ensure minor cloud cover did not affect the overall values and reflects the maximum NDVI value over the entire die-off area. We then superimposed hurricane events on the time series to determine if a pattern between storm events and changes in mangrove cover and maximum NDVI were evident.

BCO-DMO Data Processing Notes:
-Reformatted column names to comply with BCO-DMO standards
-Replaced blanks with nd