p. 255 - 262 THE EFFECT OF ES-SIDER CRUDE OIL ON THE METABOLISM OF MARINE UNICELLULAR ALGAE Pia-Elena Mihnea Romanian Marine Research Institute Constanta Abstract Results on the water extractable crude oil on four unicellular marine algae are presented. Different temperature ranges (8-12; 21-23; and 24-26 grade C) have induced different algal behaviour in the presence of crude ES SIDER oil compounds. The possible metabolic mechanism of algae exposed to crude oil is suggested.