Riverine sources of bioreactive macroelements and their impact on bacterioplankton metabolism in a recipient boreal estuary
The loading of macroelements such as, dissolved organic carbon (DOC), totalnitrogen (N) and total phosphorus (P) from terrestrial soils to aquatic systems isincreasing in the northern hemisphere. This phenomenon has several ecologicaland biogeochemical consequences for inland and coastal water systems, which arelinked to bacterial cycling of DOC, N and P. During growth, bacteria assimilatemacroeleThe loading of terrestrially derived macroelements, such as dissolved organic carbon (DOC), total nitrogen (N), and total phosphorus (P), to inland and estuarine waters is increasing in the northern hemisphere. Thesemacroelements often limit heterotrophic bacterioplankton metabolism (production and respiration), which in turn influence food web structures, exchange of greenhouse gases between the