p. 31 - 43 SALINITE ET MACRO-IONS CONSTITUANTS DANS LES EAUX MARINES DE LA ZONE SUD DU LITTORAL ROUMAIN DE LA MER NOIRE Lucia Popa et Adriana Cociasu Institut Roumain de Recherches Marines Constanta Abstract Based on monthly observations carried out in the area Constantza -Mangalia, from February to September 1978, the paper presents the salinity and majour ions distribution in the layer 0-20 m of the littoral marine waters.