Nutrients are supplied mainly via intmsions of the Ionian Surface Water and Levantine Intermediate Water, which periodically stimulate intense phytoplankton bloom episodes in the eentre of the Southem Adriatie eyelonie gyre (GACIC et al, 2002; MOROVIC et al, 2004). The dynamics of both the Southem Adriatie and Ionian Sea are intimately linked by means of the Bimodal Oscillating System meehanism that ehanges the eireulation of the North Ionian Gyre from eyelonie to antieyelonie and vice versa, on deeadal time seales (CIVITARESE etal, 2010).