Abstract

• Phytoplankton composition, abundance and distribution were evaluated on June 2013 to January 2014 from Elphinstone Island of Myeik Coastal Waters. Altogether 81 species of phytoplankton; 60 species in 37 genera which belong to 16 families of diatoms and 21 species in 9 genera which include to families of dinoflagellates were identified. The highest species composition (49 species) was found at Grants Island and Zalat Aw Gyi in November and the lowest number (22 species) was also found at Grants Island in August. The abundance of diatom species was found more than that of dinoflagellate species. The highest diversity index (H’) and the lowest species richness value (R’) were found at Espace Bay. The value of evenness index (J’) was not significantly differed by stations.