1992 Fiscal Year Final Research Report Summary
Size-structure stability and species coexistence in plant communities
| Project/Area Number |
03304003
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
生態学
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
HARA Toshihiko Tokyo Met. Univ. Dept. Biol. Assistant. Prof, 理学部, 助手 (80183094)
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| Co-Investigator(Kenkyū-buntansha) |
浅野 透 森林総合研究所, 森林環境部, 主任研究官
KOHYAMA T Kyoto Univ. Center Ecol. Res. Associate Prof, 生態学研究センター, 助教授 (60178233)
TAKADA T Hokkaido Tokai Univ. Associate Prof, 国際文化学部, 助教授 (80206755)
YAMAMOTO S Okayama Univ. Fac. Agric. Associate Prof, 農学部, 助学授 (60191409)
ASANO T Forestry & Forest Products Research Institute, Senior Research Fellow
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| Project Period (FY) |
1991 – 1992
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| Keywords | Plant community / Size structure / Growth dynamics / Projection matrix model / Species coexistence / Between-individual competition / Diffusion model |
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| Research Abstract |
The subjects of our research project are processes and mechanisms of size-structure stability, species coexistence, regeneration and succession in plant communities. Our basic idea for the research is as follows: first, formulate size-structure dynamics in plant populations (single-species) taking into account interactions between individual plants, and then understand ecological phenomena at the level of the plant community (multi-species)as interactions between single-species size-structured plant populations. We employed the diffusion equation model and projection matrix models for these purposes. Main results of our project are: 1. theory on the relationships between the growth pattern and the mode of competition. 2. simulation of three species in rain forests based on the diffusion model. 3. population dynamics of several forests based on matrix models. 4. analysis of life history evolution based on matrix models. 5. characteristics of gap dynamics in Japan. 6. significance of variation in individual growth for species coexistence. 7. simulation of species coexistence incorporating gap dynamics. 8. comparison between size-structure dynamics based on the diffusion model and based on matrix models. 9. theoretical relationships between the diffusion model and matrix models. 10. relationships between size-structure traits of main species and forest structure.
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