The Baltic Nest Institute represents a strategic alliance between Stockholm University, Swedish Environmental Protection Agency, University of Aarhus, Danish Meteorological Institute and Danish Institute for Fisheries Research (DFU), Danish Technical University. Baltic Nest Institute is a research institution physically located in Sweden and in Denmark, at the Stockholm Resilience Centre, Stockholm University and at National Environmental Research Institute (NERI), Aarhus University at Roskilde. The institute uses information from a range of institutions around the Baltic Sea, making the integrated, large scale modelling of the Nest model possible. The Nest model is a decision support system aimed at facilitating Adaptive Management of environmental concern in the Baltic Sea. Nest can be used to calculate required actions needed to attain politically agreed targets for the Baltic Sea ecosystem. Nest has been used to calculate the Country Allocation Scheme on Nutrient Reductions for the Baltic Sea Action Plan.