On August 30th 2016 r. we hosted at the Hydrobiological Station in Mikolajki management of the Nencki Institute: prof. Adam Szewczyk and prof. Hanna Fabczak and also prof. Maciej Nalecz – former director of the Nencki Institute and director of the Department of Fundamental Sciences and Engineering UNESCO in Paris, currently the Director’s Designated Representative for Strategic European Programs with his wife – prof. Katarzyna Nalecz (TJ)