Submerging coastal marsh, salinity, plant community, sea-level rise, spatial patterns, Geography, Marshes, Geomorphology, Estuaries, Biology, Wetlands, Bodies of water, Sedimentary petrology, Petrology, Topography, Botany, Salt marshes, Chemical properties, Geology, Plant ecology, Earth sciences, Sea level rise, Plants, Sediments, Geologic processes, Land, C...