Phytoplankton Community of Boalia Khal Tributary of the Halda River, Chattogram, Bangladesh

Boalia Khal is one of the important tributaries of the River Halda. The productivity of the Boalia Khal tributary of the Halda River mainly depends on the phytoplankton diversity. A study was conducted for two years period from January 2017 to December 2018 to identify the phytoplankton community of the Boalia Khal tributary. A total of 61 species of phytoplankton under 37 genera belonging to 8 classes were recorded. The dominant group of phytoplankton was 25 species of Diatoms (40.98 %) followed by 18 species of Green Algae (29.5 %), 9 species of Euglenophytes (14.75 %), 7 species of Blue Green Algae (11.48 %), and 2 species of Dinoflagellates (3.28 %). Therefore, the Boalia Khal is a productive ecosystem with a diverse group of phytoplankton species