Abstract

• Mangrove forest vegetation analyses were carried out from December 2022 to September 2023 at Kayin Chaung (KC) and Kalartan (Shwe Pyi Thit, SPT) Villages, Kyauktan Township, Yangon Region. A total of 36 quadrats (10 × 10) m2 were established at two different sites (11 quadrats in Kayin Chaung Village and 25 quadrats in Kalartan Village). A total of 23 species belong to 22 genera of 14 families were recorded in Kayin Chaung Village and 20 species belong to 19 genera of 14 families were recorded in Kalartan Village. Species diversity, species richness and evenness were calculated by Shannon-Wiener and Simpson’s indices. The quantitative analysis of species richness showed that the species richness in Kayin Chaung Village (23.83) was higher than that of Kalartan Village (20.92). The results of species diversity showed that Kayin Chaung Village was relatively diverse (H = 2.90, D = 0.93) than Kalartan Village (H = 2.55, D = 0.90). As a result of Shannon-Wiener evenness, the plant species in Kayin Chaung Village (E = 0.92) was more evenly distributed than Kalartan Village (E = 0.85). The Important Value Index (IVI) for tree species was determined by the sum of relative density, relative frequency and relative dominance by using the methods of Curtis. According to the IVI value, the ecologically successful species were Sonneratia caseolaris (L.) Engl. (La-mu) and Sonneratia apetala Banks (Kan-pa-la) in both of the villages.