One hundred and ten dead branches of Magnolia liliifera (ca 30 cm long, 1–2.5 cm diameter) that had fallen to the ground under M. liliifera trees were collected and oven-dried at 70 °C for 1 week and used for the submersion and terrestrial succession study. The submerged wood bait samples were tied separately with nylon thread and submerged in the study stream at Doi Suthep-Pui on 18 November 2002. Twenty-five wood baits were randomly collected from the stream at each sampling time along the stream of the study site. It was planned to collect samples at 3, 6, 9 and 12 months.