Abstract

• Results indicated 47 genera consisted of 88 species of phytoplankton in the samples from Maung Ma Kan water at 2018. Among these, 41 genera was represented by 76 species were diatoms of Bacillariophyta and 6 genera with 12 species were dinoflagellates of Dinoflagellata. In Premonsoon, Bellerochea horologicalis, Chaetoceros pseudocurvisetum, Proboscia alata, Rhizosolenia robusta and Syringidium americanum dominantly occurred. Among these, the most abundant was Proboscia alata, 262 cell/L and it was 15 % of the total abundance of phytoplankton. In Monsoon, Bacteriastrum varians, Bacteriastrum hyalinum, Lauderia annulata, Thalassionema frauenfeldii and Thalassionema nitzschioides were abundantly recorded. Among these, the most maximum species was Bacteriastrum varians, 265 cell/L and it was 17 % of the total abundance of phytoplankton. In Postmonsoon, Aulacodiscus argus, Bellerochea horologicalis, Palaria sulcata, Proboscia alata and Thalassionema nitzschioides were dominant. Among these, the most dominant species was Bellerochea horologicalis, 261 cell/L and it was 43 % of the total abundance of phytoplankton. Moreover, the maximum total abundance was recorded as Premonsoon (1720 cell/L) followed by Monsoon (1518 cell/L) however Postmonsoon (604 cell/L) was observed.