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The Baltic Sea Action Plan and the EU Water Framework Directive both require substantial additional reductions of nutrient loads (N and P) to the marine environment. Focusing on nitrogen, we present a widely applicable concept for spatially differentiated regulation, exploiting the large spatial variations in the natural removal of nitrate in groundwater and surface water. By targeting mitigation measures towards areas where nature’s own capacity for removal is low, spatially differentiated regulation can be more cost-effective than the traditional uniform regulation. We present a methodology for upscaling local modelling results on targeted measures at field scale to Baltic Sea drainage basin scale. The paper assesses the potential gain and discusses key challenges related to implementation of spatially differentiated regulation, including the need for more scientific knowledge, handling of uncertainties, practical constraints related to agricultural practice and introduction of co-governance regimes.

Although the concept of ecosystem services has drawn a prolific amount of recent research, little work has been done on the links between marine ecosystem services and coastal human well-being at a regional scale. Key questions in this context are that of appropriate categories for assessing human well-being and how to link different determinants of human well-being to specific ecosystem services supplied in adjacent marine areas. This paper presents the results of a case study that links tangible and intangible ecosystem benefits to a range of material and immaterial factors constituting human well-being. Determinants of human well-being were defined and indicators selected to make these linkages traceable. Ecosystem services were assessed for the offshore environment along the west coast of Schleswig-Holstein, Germany, based on the assumption of strong future development of offshore wind farming and considering the environmental and socio-economic impacts of such developments on the coastal region. This...