STUDYING THE CHANGES IN CHLOROPHYLL (A) CONCENTRATIONS RELATED TO SOME HYDROLOGICAL FACTORS IN NORTH COASTAL WATERS OF LATTAKIA CITY (EASTERN MEDITERRANEAN)

This research aimed to study chlorophyll (a) concentrations related to some hydrological properties (temperature -pH -salinity) and to determine the qualitative composition of phytoplankton in different environmental stations exposed to a different pollution sources (sewage -human activities). Six cruises were carried out during summer and autumn. Results showed that no differences in temperature and salinity. The highest concentration of chlorophyll (a) was found on autumn (7.09 mg/m3).The most dominant group in summer was Diatoms (Chaetoceros curvisetus, Leptocylindrus danicus, Guinardia striata) most Dinoflagellata dominated in autumn with high abundance of two species (Ceratium furca, Ceratium macroceros).