| Project/Area Number |
14340246
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
生態
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| Research Institution | KYUSHU UNIVERCITY |
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Principal Investigator |
TOKESHI Mutsunori Kyushu University, Faculty of Sciences, Professor, 大学院理学研究院, 教授 (30291983)
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| Co-Investigator(Kenkyū-buntansha) |
大田 直友 九州大学, 大学院・理学研究院, 学振特別研究員
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| Project Period (FY) |
2002 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2004: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2003: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2002: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | body size-density relationships / species-abundance relationships |
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| Research Abstract |
1. Body size-density relationships and species-abundance relationships were studied involving theoretical an empirical analyses, mainly using data on animal communities.
2. The neutral theory of biodiversity was examined from theoretical and conceptual points of view and some issues were raised about its applicability to biodiversity studies.
3. Body size-density relationships and species-abundance relationships were analyzed with data on stream benthic assemblages from central Europe and the UK. Species-rich stream communities displayed size-scaling relationships that were mediated by resource fragmentation processes. An attempt was made to derive an extension of the allometric and metabolic scaling theory by integrating resource fragmentation mechanisms. The result is a fractal-like size-distribution of resources, as a function of body size that explains observed energetic scaling relationships.
4. The effects of habitat complexity on benthic assemblages were experimentally analyzed. Species abundance patterns observed at different times of year showed little systematic variation with levels of habitat complexity but largely followed the patterns expected from, or lying in between, the Random Assortment model and the Random Fraction model.
5. Patterns of species/abundance-area relationships were experimentally investigated in a stone-associated molluscan community on a subtropical boulder shore. The study demonstrated the significance of scale variance/invariance in species/abundance-area relationships even within relatively small spatial scales of habitat.
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