Vulnerability of Tidal Flats to Microplastics in La Parguera, Puerto Rico

To assess microplastics (MPs, <5 mm) distribution within tidal flats we studied four sites in southwest Puerto Rico with varying mangrove densities and anthropogenic influences. We characterized MPs from surface sediments along a transect at each tidal flat. Total microplastics (MPs) collected by site and size and MPs per kg of sediment.