p. 41 - 58 DYNAMIQUE DES PHOSPHATES ET DES SILICATES DES EAUX MARINES DU LITTORAL ROUMAIN DE LA MER NOIRE DANS LA PERIODE 1959-1975 Adriana Cociasu et Lucia Popa Institut Roumain de Recherches Marines Constanta Abstract Based on observation of phosphate and silicate dynamics in the sea water along the southern Romanian coast during the period of 1959- 1975, the paper points out a substantial enrichment of the water in the two elements starting from 1969.