| Project/Area Number |
18580139
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林学・森林工学
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| Research Institution | Chiba University |
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Principal Investigator |
UMEKI Kiyoshi Chiba University, Graduate School of Horticulture, Associate Professor (50376365)
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| Co-Investigator(Kenkyū-buntansha) |
HONJI Tsuyoshi Chiba University, Graduate School of Horticulture, Professor (60173655)
LIM En-mi Chiba University, Graduate School of Horticulture, Assistant Professor (60376366)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,860,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥360,000)
Fiscal Year 2007: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | forest ecology, conservation / forest management, policy / modeling / size-structure dynamics / geographic information system |
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| Research Abstract |
Diameter growth rate, mortality rate, and ingrowth of ten major tree species growing in natural forests on Hokkaido Island, northern Japan were analyzed using a large data set obtained from hundreds of permanent plots located in various planes on Hokkaido Island. The effects of physical environmental factors including temperature, precipitation, and topography on the demographic parameters were analyzed. We found some common patterns across species in the relationships between the demographic parameters and the factors affecting them: For example, diameter growth rate was negatively affected by the presence of neighboring trees, and tree ingrowth was suppressed by the thick canopy. On the other hand, we found many species-specific responses of the demographic parameters to the physical factors.
We developed a GIS-based software that can simulate size-structure dynamics of natural forests on Hokkaido Island. This simulation software is based on the results of the above analyses of tree demographic parameters. Users of this software only have to locate their target forests and give the software the initial size structure of the target forests to simulate the change in size structures of their forests for some decades. The software also can simulate thinning of forests; the users of the software can try some thinning plans on the computers and decide appropriate plan.
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