A key issue to understanding the transformations of terrestrial organic carbon in the ocean is to disentangle the latter from marine‐produced organic matter. We applied a multiple stable isotope approach using δ 34 S and δ 13 C isotope signatures from estuarine dissolved organic matter (DOM), enabling us to constrain the contribution of terrestrial‐derived DOM in an estuarine gradient of the northern Baltic Sea. The stable iso...

We examined the hypothesis that the extent of vegetation cover governs the fluxes of nutrients from boreal and subarctic river catchments to the sea. Fluxes of total organic carbon (TOC) and dissolved inorganic nitrogen, phosphorus, and dissolved silicate (DIN, DIP, and DSi, respectively) are described from 19 river catchments and subcatchments (ranging in size from 34 to 40,000 km 2 ) in northern Sweden with a detailed analys...