Tree species composition with a diameter breast height less than 5 cm at Gunung Stong State Park (GSSP), Kelantan

A study was conducted to determine tree species composition, diversity and estimatedbiomass in Gunung Stong State Park (GSSP), Dabong in Kelantan. Five plots of 20 mx 20 m with a total of 0.2 ha with different heights for each plot namely the first plot 452 a.s.l, the second plot 454 a.s.l, the third plot 456 a.s.l, the fourth plot 458 a.s.l and the last plot 460 a.s.l were established and all trees with diameter at breast height (DBH) ≤ 5 cm iscalculated. A total of 273 individual trees were counted and identified into 40 families,67 genera and 88 species. Lauraceae is the largest family consisting of 3 genera and 4 species. The total basal area is 1.0253064 m2/ha. Garcinia morella is the main contributorin this study because the number of diameters is larger, affecting the number of biomasses on the ground, which is 0.03093 t/ha. Overall, the Shannon-Weiner Diversity Index (H') showed a value of 3.6. The total biomass of trees on the ground is estimatedat 0.61892904 t/ha. This study shows that there are species listed as vulnerable by the IUCNRed Data Book. Therefore, these species must be carefully observed so that their habitats will not become extinct.