Tree Size in a Mature Dipterocarp Forest Stand in Sebulu, East Kalimantan, Indonesia

The forest plant size, especially tree size, was cxamined in a mature dipterocarp foix st stand in Sebulu, East Kalimaritan.Indonesia.One hundred and ninety-one liying trees 1.3 m high and higher, thiee lianas living on dead trees, one smarl standing liana, and one palm were fe11ed, and their sizes were measured using the stratMed clip tochnique and recorded.Of these sample plants, the largest was a Shorea laevis tree: total height was 70.7 m; stem diameter at the terminal of its buttresses, 4,6 m high, was 130.5cm; stem volume was 41.1 m3; stem dry weight was 33129.768kg; branch dry weight was 9S86.120ng; leaf dry weight was 107.614 kg; leaf area was 767.372 m2.TIhe plant mass of dependent plants living on independent plants was also measured using the stratified clip technique.The aboveground biomass in a narrow O.125 ha sampling spot was calculated by summing the plant mass values of individual sarnple plants.It totaled 872.949 t/ha in dry weight for al1 living plants and 7.962 ha/ha in leaf area, although these values were too large to represent the mean biornass of the dipterocarp forest in the study area because that forest patch included the huge emergonttrec.