2007 Fiscal Year Final Research Report Summary
How long does the Sasa population recover from mass flowering and dieback? With special reference to the clonal dynamics in the regeneration process.
| Project/Area Number |
16380108
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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 |
林学・森林工学
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| Research Institution | Akita Prefectural University |
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Principal Investigator |
MAKITA Akifumi Akita Prefectural University, Dept of Bioresouroe Sciences, Professor (60315596)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIWAKI Aya Miyazaki University, Dept of Agriculture, Professor (60228244)
SUZUKI Jun-ichiro Tokyo Metropolitan University, Dept of Biological Science, Associate Professor (00291237)
SUYAMA Yoshihisa Tohoku University, Graduate school of Agricultural Science, Associate Professor (60282315)
SAITOH Tomoyuki Forestry and Forest Products Research Institute, Kiso-Research Branch, Researcher (00414483)
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| Project Period (FY) |
2004 – 2007
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| Keywords | clonal plants / Sasa / mass flowering and death / regeneration process / microsatellite / clonal structure / demography / DNA analysis |
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| Research Abstract |
The present study aimed to clarify how long does it take from seedling emergence to the full recovery of Sasa population after mass flowering, with special reference to the clone dynamics in the regeneration process. Mass flowering and death of Sasa population is known to be an important episodic event in the forest vegetation dynamics in Japan.
Our research sites are as follows : 1) Togakushi (Nagano Pref.) ; Sasa kurilensis flowered in 1974. 2) Hakkoda (Aomori Pref. ) ; S. kurilensis flowered in 1979, 3) Towada (Akita Pref.) ; S. kurilensis flowered in 1995, and 4) Oomi (Kyoto Pref) S.veitchii var. firsuta flowered in 2007.
Main results are as follows :
1) Isolation and characterization of microsatellite loci for several Sasa species, and analyzing of clonal structures of Sasa populations in the regeneration process.
2) Exploitation of a demographic research method for clarifying the clone dynamics during the regeneration process.
We studied the dynamics of Sasa juvenile population with DNA analysis and clarified that the self-thinning process had been continued even in the 20-year old S. kurilensis juvenile population. So, it confirmed that it takes more than 20 years from seedling emergence to the full recovery of Sasa population after mass flowering.
3) The changes in clonal structures during the regeneration process.
By the research in a 10-years old juvenile population and the non-flowered full size stage population for S. kurilensis in Towada Site, we found that the growth of Sasa juveniles were affected by the light conditions determined by the canopy conditions and that the full-sized S. kurilensis population was composed with the very large clones, up to 2500 m^2. During the regeneration process, a few large genets grown in the good light cognitions like canopy gaps are presumed to become dominant in the future.
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Research Products
(60 results)
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[Presentation] 一斉開花したチュウゴクザサ講におけるクローン構造と繁殖努力2008
Author(s)
松尾 歩, 陶山 佳久, 住吉 千夏子, 井鷺 裕司, 長谷川 尚史, 斎藤 誠子, 柴田 昌三, 阿部 佑平, 齋藤 智之, 西脇 亜也, 鈴木 準一郎, 蒔田 明史
Organizer
日本森林学会第119回大会
Place of Presentation
東京
Year and Date
20080300
Description
「研究成果報告書概要(和文)」より
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[Presentation] Qonal structure of Sasa kurilensis and S. veitchiivar. firsuta2008
Author(s)
Matsuo, A., Sumiyoshi, C., Saitoh, S., Sangetsu, Y., Fuji, S., Suyama, Y., Makita, A
Organizer
Japanese Ecological Society, 55th
Place of Presentation
Fukuoka
Year and Date
20080300
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Mass flowering and regeneration of Melocanna baccifera which flowers in a 48-years cycle.2008
Author(s)
Shibata, S., Ikeda, K., Suyama, Y., Saitoh, T., Hasegawa, N., Miguchi, H., Nishiwaki, A., Makita, A
Organizer
Japanese Ecological Society, 55th
Place of Presentation
Fukuoka.
Year and Date
20080300
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Clonal structure and reproductive efforts of Sasa veitehiivar. firsuta2008
Author(s)
Matsuo, A., Suyama, Y., Saitoh, T., Nishiwaki, A., Makita, A., et. al.
Organizer
Japanese Forest Society, 119th
Place of Presentation
Tokyo
Year and Date
20080300
Description
「研究成果報告書概要(欧文)」より
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