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Forest Loss is Accelerating Along the US Gulf Coast
Matthew J McCarthy1, Benjamin Dimmitt2, Sebastian DiGeronimo1
1College of Marine Science, University of South Florida, 140 7th Avenue South, Saint Petersburg, FL 33701 USA.
Abstract:
Sea-level rise is impacting the longest undeveloped stretch of coastline in the contiguous United States: The Florida Big Bend. Due to its low elevation and a higher-than-global-average local rate of sea-level rise, the region is losing coastal forest to encroaching marsh at an unprecedented rate. Previous research found a rate of forest-to-marsh conversion of up to 1.2 km2 year-1 during the nineteenth and twentieth centuries, but these studies evaluated small-scale changes, suffered from data gaps, or are substantially outdated. We replicated and updated these studies with Landsat satellite imagery covering the entire Big Bend region from 2003 to 2016 and corroborated results with in situ landscape photography and high-resolution aerial imagery. Our analysis of satellite and aerial images from 2003 to 2016 indicates a rate of approximately 10 km2 year-1 representing an increase of over 800%. Areas previously found to be unaffected by the decline are now in rapid retreat.
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