Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast.

摘要: Declining atmospheric nitrogen (N) deposition, through reduction in the direct input of inorganic N, may result less N being leached from soils to freshwaters (dissolved = DIN). sulphur reducing ionic strength soil water, increases solubility and mobility organic compounds increased leaching organically bound (total TON). It is unknown which extent these two independents opposing trends, i.e. DIN decline versus TON increase, affect nutrient balance (load, stoichiometry) river water draining into coastal zones. By combining long-term riverine monitoring data five major Norwegian rivers Skagerrak coast, we show that over past 27 years (1990-2017) composition, specifically stoichiometry has been steadily shifting fractions, with correlations changes human pressures (air pollution), but especially climate (precipitation, temperature, discharge). This shift quality have large consequences on cycling both freshwater ecosystems illustrates complex interactions multiple stressors (here: S change) aquatic ecosystems.