Abstract
A study on floristic composition, community structure and biomass of Rubiaceae was carried out in Bangi Permanent Forest Reserve, Selangor. In the 0.45 ha of ecological plots, a total of 17 species from three genera of Rubiaceae was recorded for trees with a diameter ≥ 1.0 cm DBH. Three genera viz. Canthium, Ixora and Urophyllum were represented by two species each, while remaining genera comprised of a single species each. Shrub group represented the largest total number of species with seven species followed by the understorey with four species. The range of tree DBH in the study plot was between 1.0 and 31.3 cm. The genus with highest density was Aidia, viz. 244 trees/ha, represented by Aidia densiflora. Total basal area for Rubiaceae was 1.69 m2/ha, with the genus Aidia, specifically the species Aidia densiflora, contributing the highest basal area of 0.57 m2/ha (33.91%). Total biomass estimate (above ground and below ground) for this family was 16.71 t/ha. At genus level, Timonius contributed the highest total biomass value, viz. 5.82 t/ha (34.85%), represented by the species Timonius wallichianus.
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