| Project/Area Number |
01560165
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
林学
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKEDA Hiroshi Kyoto University, Associate Prof., 農学部, 助教授 (60109048)
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| Co-Investigator(Kenkyū-buntansha) |
IWATSUBO Goro Kyoto University, Professor, 農学部, 教授 (00026395)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Soil organic layer / Decomposition / Collembola / Oribatid mites / Direct decomposer / Indirect decomposer / Soil animals / Coniferous forests / リタ-バッグ / ヒノキ針葉 / 分解過程 / 植物遺体 / リ-チング / 土壌動物ー微生物の相互作用 / リタ-バッグ法 / コナラ林 / モ-ダ型 / ムル型 / 斜面地型 |
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| Research Abstract |
In the forest ecosystems, the patterns and processes of soil organic layer formation were characterized by the biotic factors, such as microbial and soil animal communities. In this study, the roles of soil animals in the soil organic layer formation were studied by two methods, i. e, the field experiments of litter decomposition processes using litter bags, and the direct observations on the soil thin sections taken from the soil organic layers in the coniferous forests.
Basing on the feeding habits of soil animals, soil animals were divided into two groups, i, e. direct decomposer animals including Oribatid mites, and indirect decomposer animals (grazer) including Collembola and Diptera larvae.
The direct decomposer contributed to the organic matter decomposition through their feeding on the plant leaf litter. The indirect decomposer animals contributed to the decomposition processes of litter through the grasing habits on the microbial communities developped on the leaf litter.
The soil animals showed an important roles in the soil organic layer formation through the organic-faces structures during the decomposition processes in the soil organic layer.
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