11.6 Conclusions/Suggestions

11.6 Conclusions/Suggestions

Comparative analyses of mesocosm experiments and ecosystems responses are appropriate tools to define dose-response relationships and to determine and understand thresholds of nutrient inputs. Similar approaches, but involving long-term records, of which Europe has a few, could be used to define `points of no return'. Evidence of major differences in the magnitude and nature of nutrient inputs to different regions in Europe exists, as well as differential responses of the coastal ecosystems therein. On the basis of these differences, it is suggested that the unit of analysis (and specific legislation) should be coastal biogeochemical provinces, which are still to be defined

11.6 Conclusions/Suggestions