Reference state, structure, regime shifts, and regulatory drivers in a coastal sea over the last century: The Central Baltic Sea case

[1 ]Baltic Sea Centre, Stockholm University Stockholm Sweden

[2 ]Stockholm Resilience Centre, Stockholm University Stockholm Sweden

[3 ]National Institute of Aquatic Resources, Technical University of Denmark Lyngby Denmark

[4 ]Tvärminne Zoological Station, University of Helsinki Helsinki Finland

[5 ]Institute for Marine Ecosystem and Fisheries Science, Center for Earth System Research and Sustainability (CEN), University of Hamburg Hamburg Germany