| Budget Amount *help |
¥31,590,000 (Direct Cost: ¥24,300,000、Indirect Cost: ¥7,290,000)
Fiscal Year 2015: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2011: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Outline of Final Research Achievements |
Conifers of families Podocarpaceae and Araucariaceae can become dominant in mountains and on nutrient-poor soils in tropical forests which are otherwise dominated by angiosperm trees. Conifer dominance increases on more nutrient-deficient soils. On soils with intermediate fertility, conifers are 'long-lived pioneers', which regenerate during rare disturbance events and reside in canopy for a long time. On severely nutrient-deficient soils, conifers regenerate continuously. We suggest that soil fertility affects the growth of angiosperm trees, which modifies the light environments in the forest, and thereby determines conifer dominance. Apparently drought-resistant characters in conifers seem to reflect the adaptation to nutrient deficiency.
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