| Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Outline of Final Research Achievements |
Lowland evergreen forest and upland evergreen forest of Sundaic region are respectively characterized by abundant Dipterocarpaceae and Fagaceae species. Comparative domographic analysis based on genetic variation using molecular markers was applied on several representative species in these forests, which are broadly distributed in the area to testify the opposing hypothesis about the condition of the tropical rain forest in the last glacial maximum (LGM). Both Dryobalanops aromatica and Shorea curtisii showed clear genetic structure between groups of Malay-Sumatra and Borneo populations. Splitting time of the two groups was estimated far beyond the LGM, which occurred 20,000 years ago. This suggests that tropical rain forest at the LGM was divided into two main refugia in Borneo and in Malay-Sumatra probably by savanna corridor between them. Frequent gene flow revealed in D. aromatica suggests that the corridor was not completely continuous and interrupted by forests in some places.
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