Researchers from Poland, Spain and Canada analyse changes in hair stable isotope composition. These are “markers” that can track changes in the environment. Changes observed during 66 years can be related to the use of fertilizers and the raising global temperatures

The aquatic ecosystems of Doñana and those of its watersheds are highly threatened by multiple human pressures. Among them, the strong development of agriculture and the increase of population have been the main causes of the loss of quantity and quality of freshwaters during the last decades. Nitrate pollution is one of the main problems affecting both surface and groundwaters in Doñana and its surroundings. Previous studies have shown that the Doñana aquifer receives nitrates due to the...