Table 3. Species composition and structural features of all stems ≥1.27 cm dbh in four mangrove forests in Trang, southern Thailand. CF: community forest, SF: state forest. #/ha: number of trees per hectare, RA: relative abundance, BA/ha: basal area per hectare (m2), RBA: relative basal area. Species that were present but with a BA or RBA of less than 0.01 are listed as 0.00.

Landward mangrove Seaward mangrove
Tong Tasae (CF) Tab Jak (SF) Laem Makham (CF) To Ban (SF)
Species #/ha RA BA/ha RBA #/ha RA BA/ha RBA #/ha RA BA/ha RBA #/ha RA BA/ha RBA
Amoora cucullata 5 0.08 0.00 0.03
Avicennia alba 23 1.66 0.75 0.96 127 4.11 1.81 11.73 41 0.84 1.15 5.21
Avicennia marina 32 1.03 1.21 7.88 5 0.08 0.36 3.69
Avicennia officinalis 136 2.8 0.11 0.5 9 0.16 0.27 2.75
Bruguiera cylindrica 68 1.21 0.16 1.67
Bruguiera gymnorrhiza 9 0.29 0.07 0.48
Bruguiera parviflora 18 0.59 0.07 0.46 259 5.32 0.44 2 73 1.29 0.13 1.29
Bruguiera sexangula 50 3.64 0.17 0.22 386 12.48 0.63 4.06
Caesalpinia bonduc 9 0.66 0.00 0.00
Ceriops decandra 305 22.19 0.23 0.29 632 20.41 0.56 3.61 927 19.05 1.65 7.48 1350 23.87 1.47 14.95
Ceriops tagal 100 2.05 0.25 1.12 864 15.27 1.16 11.88
Cynometra iripa 5 0.33 0.01 0.01
Excoecaria agallocha 123 8.94 3.74 4.78 45 1.47 0.65 4.18 9 0.16 0.09 0.95
Heritiera littoralis 186 13.58 3.48 4.44 150 4.85 0.71 4.61 5 0.08 0.00 0.01
Rhizophora apiculata 173 12.58 1.16 1.49 923 29.81 2.08 13.47 3223 66.2 17.8 80.66 2795 49.44 5.51 56.24
Rhizophora mucronata 141 2.89 0.48 2.16 223 3.94 0.15 1.49
Scolopia macrophylla 5 0.33 0.00 0.00
Scyphiphora hydrophyllacea 5 0.08 0.03 0.32
Sonneratia griffithii 45 3.31 6.34 8.1
Xylocarpus granatum 95 6.95 6.39 8.16 350 11.31 3.38 21.93 23 0.47 0.14 0.64 14 0.24 0.00 0.04
Xylocarpus moluccensis 355 25.83 56.05 71.55 423 13.66 4.25 27.58 18 0.37 0.05 0.22 232 4.1 0.46 4.69
Number of Species 12 11 9 14
Sum 1373 78.3 3095 15.4 4868 22.1 5655 9.8