1998 Fiscal Year Final Research Report Summary
Evaluation of the fitness increased by seed dispersal
| Project/Area Number |
08454250
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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 | KYOTO UNIVERSITY |
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Principal Investigator |
ASANO Toru Professor, Center for Ecological Research Kyoto University, 生態学研究センター, 教授 (00281105)
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| Co-Investigator(Kenkyū-buntansha) |
KIKUZAWA Kihachiro Professor, Center for Ecological Research Kyoto University, 生態学研究センター, 教授 (50271599)
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| Project Period (FY) |
1996 – 1998
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| Keywords | Seed dispersal / zoochory / wind dispersal / fitness / セーフサイト |
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| Research Abstract |
The fitness increased by seed dispersal was evaluated for several tree species with two typical dispersal modes.
1) Wind dispersal
Dispersal patterns of several wind dispersed species were analyzed in a mathematical model, and the adaptation to increase the dispersal distance was discussed. Also, the dispersal distance and the width of the safe site are correlated for these species.
2) Animal dispersal
A tree species, Kalopanax pictus, was analyzed for its dispersal mode and dormant characteristics of seed. The seed dispersed by birds germinated without time lag, though the seed not dispersed by birds tended to have dormancy. Another species, Corn us controversa, also has dormant seeds, whose germination rate is related to the distance dispersed.
3) Theoretical analyses on seed dispersal
The evolutionarily stable resource allocation for wind dispersed seeds were theoretically analyzed.
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