Diversity, diameter structure and spatial pattern of trees in a semi-evergreen rain forest on Langkawi Island, Malaysia
2001
M. Kohira | I. Ninomiya | Ahmed Zainudin Ibrahim | Abdul Latiff
Species diversity, diameter structure and the spatial patternof trees were studied in a 2.4-ha plot of the semi-evergreen rain forest at MachinchangForest Reserve, Langkawi Island, Malaysia. The 3518 trees > 5 cm dbh studiedcomprised 208 species from 45 families, including 156 species in 41 families for1484 trees > 10 cm dbh. Number of species per area was higher in trees 5 - < 10 cmdbh than in trees > 10 cm dbh. The plot was dominated by Anacardiaceae, particularlySwintonia floribunda, which was the most frequent (11.1%) and displayed the greatestbasal area (12.8%) of all trees. Swintonia floribunda was consistently dominant in allfive dbh classes defined from the M-w relationship. Among 64 common speciesexamined for spatial pattern, 2, 42 and 20 species exhibited uniform, random andclumped distribution respectively. The plot was characterised by lack of familydominance by Dipterocarpaceae.
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