Abstract

• This research conducted in the mangrove forests of Kanyin Chaung coastal area, Thayet Chaung Township, Dawei District, Tanintharyi region. To study the floristic diversity, forest structure and aboveground biomass of mangrove forest of Kanyin Chaung coastal area, twelve sample plots (20m x 20m) were established and observed during 2018. The diversity index of Kanyin Chaung coastal area was H=3.49, D= 0.90 and E= 0.92 (i.e Shannon-Wieners index (H), Simpsons index (D) and Shannon-Wieners index (E). Ecological successful species with the highest Importance Value Index were Rhizophora mucronata (44.02 %), Xylocarpus moluccensis (36.53 %) and Avicennia marina (31.45 %) in Kanyin Chaung coastal area. Forest density and basal area were 539 stem ha-1 and 14.11 m2 ha-1 in the study area. The total mean aboveground biomass and carbon stocks of the study area were estimated 111.19 ton ha-1 and 53.37 C ton ha-1 . Aboveground biomass was significantly correlated with study stand (p<0.01) of the study area.