Lianas are an important component in tropical forests but identification often is problematic. DNA-barcoding allows accurate identification and the phylogenetic analysis of a species assembly which is be shaped by environmental gradients and biotic interactions (e.g. host trees). ..Objectives are.-.To establish a DNA-barcode library for the species..-.To examine if lianas communities are more or less phylogenetically clumped as expected by chance.Lianas (> 1 cm diameter) of a dipterocarp forest will be inventoried in 48 plots, covering ridges, slope and river bottoms. 4 markers (rbcL, matK, trnH-psbA, ITS) will be used for DNA barcoding. Data analysis includes the calculation of phylogenetic indices (NRI, NTI), phylogenetic tree and ordination. . .The distribution of clades should be clumped at slopes with high light availability, since the habitat should be the main influence. At ridges, neighboring lianas should be less related, since biotic interaction with hosts should influence the assembly.