IMPLICATION OF LAKEWATER RESIDENCE TIME ON THE CLASSIFICATION OF NORWEGIAN SURFACE WATER SITES INTO PROGRESSIVE STAGES OF NITROGEN SATURATION

Classification (in stage 0, 1, 2 or 3) of 12 superficial waters according to the N saturation stage concept, N deposition levels and hydrologic regimes - Description of N specific catchment linked to the soil type and vegetation cover - Discussion of these effects on the acid-stress on sensitive organisms or life stages.