Species and structure of forests in Tampakan Highlands, South Cotabato, Philippines

Justino M. Quimio and Nelson L. Quilario


The study was conducted in a logged-over forest of Tampakan Highlands that has an elevation of about 1,350 m. It was aimed to assess the timber stocking rate and level of floristic diversity of the forests that may be influenced by future mining operation in the area. Data were collected and presented following the Braun-Blanquet methodology.

Results indicate that Tampakan forests are highly productive, with relatively large trees and highly diverse species despite past logging. Forty-nine (49) timber species and timber stocking rate of 69 cu m/ha were recorded in the forests. A total of 312 plant species had been listed in the 73 plots or in combined area of 1.93 ha. The forest still contained most species of the original old-growth forest. The pioneer vegetation dominated by Piper aduncum was very low in species richness. This indicated the importance of natural forest in preserving native flora.

It is recommended that a zoning plan be prepared to demarcate areas that need to be reserved as permanent forest and more effective forest protection schemes be devised. Enrichment planting in pioneer areas should be undertaken, with active participation of the B’laan tribe.

Keywords: Braun-Blanquet, floristic inventory, Philippine forest, Tampakan Highlands

Annals of Tropical Research 29(2):47-65(2007)
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