Seasonal dynamics of dissolved organic matter along an intertidal gradient in semi-arid mangrove soils (New Caledonia)

This dataset contains measurements of dissolved organic matter (DOM) quantity and quality in semi-arid mangrove soils along an intertidal gradient (salt-flat, Avicennia marina stand, Rhizophora stylosa stand) in New Caledonia. Soil and porewater samples were collected during both wet and dry seasons and analyzed for physicochemical parameters, total and dissolved organic carbon (TOC, DOC), chromophoric and fluorescent DOM (CDOM, FDOM) composition. Data are provided in Excel format. These measurements support the analysis presented in the submitted manuscript to Biogeosciences and document DOM dynamics across mangrove habitats under contrasting seasonal conditions.