Marta Gluchowska¹, Kaja Balazy², Malin Daase³, Katarzyna Koziorowska², Slawomir Kwasniewski¹, Karol Kulinski², Weronika Patuła¹, Janne Søreide³, Paul Renaud⁴ and Emilia Trudnowska¹, (1)Institute of Oceanology Polish Academy of Sciences, Department of Marine Ecology, Sopot, Poland, (2)Institute of Oceanology Polish Academy of Sciences, Sopot, Poland, (3)University Centre in Svalbard, Department of Arctic Biology, Longyearbyen, Norway, (4)Akvaplan-niva, Tromsø, Norway