Annual cycle,species diversity and succession of phytoplankton in lower Saronicos Bay,Aegean Sea

Phytoplankton cycles of lower Saronicos Bay, Aegean Sea, are described on the basis of net samples collected during 1967. The annual cycle is largely due to changes in diatom concentrations (cells/liter). The diatom summer poverty is due mainly to high light intensities, phosphate depletion and extensive grazing. The species succession and diversity have been examined, and the results are discussed.