p. 109 - 127 SOME PROBLEMS CONCERNING ACTUAL ECOLOGICAL CHANGES IN THE BLACK SEA Marian-Traian Gomoiu Romanian Marine Research Institute Constanta Abstract The paper briefly presents the main ecological events present in the last years in the coastal ecosystems of the north-western part of the Black Sea (the increasing eutrophycation/pollution and their consequences, the appearance of new species etc.)The author points out the necessity of continuing and amplifying the researches for a better understanding of the evolution of ecosystems.