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A study on species composition, diversity and biomass of genera  Dipterocarpus  and  Hopea  at Bukit Bakar Forest Eco Park, Machang, Kelantan was conducted. A total of 5 ecological plots with measurement of 20 m x 20 m were established. All trees with diameter at breast height (dbh) less than 5.0 cm were tagged, measured and collected for specimen identifications and voucher specimen’s preparations. The floristic composition of Bukit Bakar Eco Park consists of 135 individuals represented by 1 family, 2 genera and 17 species. The most abundance species recorded was  Dipterocarpus crinitus  Dyer with 23 individuals were recorded.  Dipterocarpus crinitus  (Dipterocarpaceae) was the most important species according to Important Value index (IV i ) calculated at IV i  = 17.73%. Dipterocarpaceae was the most high species diversity according to Shannon Wiener Index, H’=2.02 (H’ max =2.30) for  Dipterocarpus spp.  and H’=1.90 (H’ max =1.94) for  Hopea spp.  and Simpson’s Index of Diversity for  Dipterocarpus spp.  is 0.85 and 0.86 for  Hopea  spp.. Whilst  Hopea  had a slightly higher Species Evenness Index (E H =0.98) compared to  Dipterocarpus  (E H =0.87). Total tree biomass estimation in the study area was at 145.18 t/ha.

iop conference series. earth and environmental science

Preliminary Study on Tree Species Composition, Diversity and Biomass of Dipterocarpus and Hopea genera of Bukit Bakar Forest Eco Park, Machang, Kelantan