Long-term soil salinity and organic content from the Georgia Coastal Ecosystems LTER Project on Sapelo Island, Georgia

Soil samples were collected in conjunction with annual plant monitoring at half of the permanent vegetation monitoring plots in the creekbank and midmarsh zones at 10 GCE study sites beginning in 2009. Pore-water salinity was determined by analysis of supernatant salinity in dried soil samples hydrated with a measured volume of deionized water. Organic content was measured gravimetrically by comparing ash-free dry weight and total weight of soil samples.