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Liana diversity and abundance of a tropical montane rainforest in Mengsong,Southern Yunnan,China

CHEN Ya-Jun, WEN Bin( Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Mengla 666303, China )  
Species richness, abundance, size-class distribution, climbing mode and the percentage of trees (DBH≥5 cm) infested by lianas were investigated in valley and ridge plots in a tropical montane rain forest in Mengsong,southern Yunnan. A total of 64 liana species representing 30 families were recorded. There were averages of 95.7 and 57 lianas with dbh≥1 cm in the valley and in the ridge per 0.1 hm2,respectively. A greater proportion of lianas was twiners (57% of density) while 3% of all were tendril climbers,reflecting the late successional stage of the forest. Approximately 43.7% and 28.6% of trees (dbh≥5 cm) were liana-infested in the valley and ridge plots. Compared to other tropical Asian tropical forests,the density of lianas in Mengsong are very high though the diversity of species is relatively low. There are also some huge lianas in some plots,which is the most conspicuous characteristics of a mature tropical rain forest.
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