p. 61 - 76 ELEMENTS CONCERNANT LA STRUCTURE ET LA DYNAMIQUE DU PHYTOPLANCTON DU LITTORAL ROUMAIN DE LA MER NOIRE PENDANT LA PERIODE 1972-1977 Nicolae Bodeanu, Anca Roban et Mioara Usurelu Institute Roumain de Recherches Marines Constanta Abstract The structure and dynamic pecularities of the phytoplankton from the Romanian Black Sea area are presented in the paper. The problems are discussed in connection with the eutrophication process and the decreasing salinity recorded in different time periods during the 1972-1977. There are also pointed out the important stocks of phytoplankton produced in some characteristic zones.