p. 33 - 52 PARTICULARITES DU REGIME HYDROCHIMIQUE DES EAUX MARINES DU SUD DU LITTORAL ROUMAIN PENDANT LA PERIODE DECEMBRE 1977 - NOVEMBRE 1978 Adriana Cociasu, Lucia Popa et Liliana Dorogan Institute Roumain de Recherches Marines Constanta Abstract The paper presents some modifications in the general dynamics of the main chemical agents having direct effects on the trophic potential of the sea in hydrological conditions specific to the period of December 1977 - November 1978.