دراسة توزع انواعٍ من العوالق النباتية حقلياً تحت تاثير بعض العوامل البيئية

In this research which continued from December 2010 to march 2012 , we could determined 194 species of phytoplankton grow in six sites in Syrian coast . Studied spieces are belonged to five phylum which distributed as : (95) species of Chrysophyta all of them belong to Diatomophyceae and (46) of Chlorophyta and (18) species of Cyanophyta, (31) species of Pyrrhophyta, (4) species of Euglenophyta. The physical and chemical analysis of studied site of showed that there are water differences in values between sites from one hand and between seasons along the year on the other hand , the distribution and spreading of phytoplankton which determinded effected by environmental conditions specially in water temperature and pH ,devolved oxygen and salinity . the numbers of sea species reached to (76) species but only (30) species found on sweet water , while the numbers of spieces which grow in both environments arrived to (88