المجلة الدولية للعلوم والتقنية

Studying the algal flora inhabiting the Libyan coast, especially the western Libyan coast, is very neglected by researchers as well as their contents of bioactive compounds. In our study ten algal species belonging to the three main algal divisions (Chlorophyta, Rhodophyta & Phaeophyta) were investigated in three different regions of the western Libyan coast (Al Mutrad, Surman, and Sabratha) seasonally during the period from September 2021 to Jully 2022, the study showed that, during the study period Sabratha region only contained all the ten algal species, while the red alga, J. rubens, was also recorded in Al-Mutrad region, and L. obtusa was also recorded in Surman region. There was no algal flora belonging to chlorophyta were detected in each of Al-Mutrad or Surman regions during the study period. Seasonal environment changes resulted in variation of the algal distribution where some algae were existed only during one season of the year, such as Cladophora, H. filicina, and S. vulgare while J. rubens & P. pavonica were recorded throughout the whole year. Chlorophyll content also was estimated in different algal species and results indicated that brown alga P. pavonica (from Sabratha in summer) had the highest chlorophyll content (20.53 µg/ml) followed by the red alga J. rubens (from Sabratha in summer) (16.53 µg/ml), the high chlorophyll content indicated the economic importance of the investigated marine algal species and need further study to can be used in pharmacological or cosmetic fields. Keywords: Al- Mutrad, chlorophyll, marine algae, Sabratha, Surman, western Libyan coast.