The floristic composition of tropical montane forest in Doi Inthanon National Park, northern Thailand, with special reference to its phytogeographical relation with montane forests in tropical Asia
Hara, M.; Kanzaki, M.; Mizuno, T.; Noguchi, H.; Sri Ngernyuang, K.; Teejuntuk, S.; Sungpalee, C.; Ohkubo, T.; Yamakura, T.; Sahunalu, P.; Dhanmanonda, P.; Bunyavejchewin, S.
Natural History Research 7(1): 1-17, 25 March
We present a preliminary report and phytogeographical analysis of the tree flora of tropical montane forest on Doi Inthanon based on an enumeration of all trees gtoreq1.0 cm in diameter at breast height in a 15-ha plot. We found 165 species in 106 genera and 58 families, and identified 126 species (77%). In terms of species richness, the Lauraceae had the most at family level with 25 species, and Litsea (Lauraceae) had the most at genus level with 9 species. In terms of basal area, the Fagaceae, Lauraceae and Cornaceae were the most dominant families, comprising respectively 20.0%, 15.1% and 11.8% of the total basal area. The most dominant species in the plot was Mastixia euonymoides Prain (Cornaceae). Of the 126 identified species, 75 (60%) are common to the Himalayas and 47 (37%) are common to Malesia. The floristic affinity to tropical montane forests in Malesia is relatively high at genus level. The dominance of the Lauraceae, Fagaceae and Magnoliaceae is common to the montane forests of Southwestern China and the eastern Himalayas, but the forest of Doi Inthanon is richer in tropical elements.