Contribution of tree species to the biodiversity of a 1 ha Old World rainforest in Brunei, Borneo.
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Tree biodiversity data is presented for a 1-ha permanent study plot on a low slope position of the Kuala Belalong valley in Temburong District, Brunei, Borneo. This is the first study in the region to document the tree flora of a low slope. All trees ge5thinspcm at 1.3thinspm were mapped, measurements of dbh and height taken, and identified to species and morpho-species level. The total and relative values of each family for density, diversity, dominance and Importance Value Indices were calculated. A total of 1062 stems were recorded on the plot (1019 live, 43 dead) with a total of 278 species representing 110 genera in 49 families. The most ecologically significant family as determined by the Family Importance Value (FIV) was Euphorbiaceae with a value of 40 and''the''most significant species, using the Importance Value (IV), was morpho-speciesFordia splendissima with an IV of 29. The total basal area of all living trees was 31.43thinspm2. Forest structure was marked by a few tall (>45thinspm) emergents, for example,Koompassia excelsa, Crypteronia griffithii and two species of the Dipterocarpaceae family, however, lower understorey and sub-canopy species dominated the plot with the average height of all individuals over the hectare being 11thinspm.
Biodiversity and Conservation
Copyright Kluwer 2004. The original publication is available at www.springerlink.com
HISTORY AND ARCHAEOLOGY