1. Swedish University of Agricultural Sciences; Department of Aquatic Resources; Institute of Coastal Research; Skolgatan 6; 74242 Öregrund; Sweden
2. AquaBiota Water Research; Löjtnantsgatan 25; 11550 Stockholm; Sweden
3. Finnish Environment Institute; Marine Research Centre; PO Box 140; 00251 Helsinki; Finland
4. Department of Biosciences; Environmental and Marine Biology; Åbo Akademi University; Artillerigatan 6; 20520 Åbo; Finland
5. Department of Biological and Environmental Sciences; University of Gothenburg; Tjärnö; 45296 Strömstad; Sweden