2007 Fiscal Year Final Research Report Summary
How is the branch-scale spatial structure related to the stand dynamics?
| Project/Area Number |
17380085
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
林学・森林工学
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
SUMIDA Akihiro Hokkaido University, Inst. of Low Temperature Sci., Assoc. Prof. (50293551)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
UMEKI Kiyoshi Chiba Univ., Grad. School of Horticulture, Assoc. Prof. (50376365)
|
|---|
| Project Period (FY) |
2005 – 2007
|
| Keywords | branching structure / 3-D structure of the trunk and large branches / crown structure / shoot dynamics / correlative inhibition / functional-structural tree models / photosynthesis / branching model |
|---|
| Research Abstract |
To investigate relationships of the structure and dynamics between branch and community scales, the following studies were conducted. In Betula platyphyll seedlings, the mortality of current-year shoots increased with increasing relative light intensity above individuals, and the mortality of the part of a branch at the age of three years tended to be high due to the mortality of the current-year shoots. On the other hand the mean length and the mean leaf number per current-year shoot were the largest in individuals under moderate relative light intensity. Diameter of a shoot was related to plural factors such as morphological characteristics of mother shoots and branch-tip light intensities, while relative importance of each factor changed as shoot aged. These results suggest that, in the community-grown trees, growth, bifurcation and death of branches are partly regulated by processes at the individual level. A simulation model approximating branching development at the top canopy of Quercus serrata revealed that the extension of the main stem of a twig was determined such that the leaf area of the twig was the maximum, and death of relatively large branches could occur simply by regulating death of current-year shoots. A simulation model using the ray-tracing method on the basis of a long-term observation for the development of Q. crispula crowns revealed that trees could avoid from intense neighborhood competition by developing crowns toward lighter directions. Because the community-scale dynamics is integration of the growth of individuals, the results above were cue to the study of the connection between scales at the branch and at the community. Further, for verifications of forest dynamics models, we proposed a ground-based estimation method of individual leaf amount, stand LAI and vertical distribution of leaf area, and a new definition of canopy height objectively determinable with stand inventory data.
|
Research Products
(49 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 新しい森林群落高表現法2009
Author(s)
中井太郎, 隅田明洋, 兒玉裕二, 原登志彦, 太田岳史
Organizer
第56回日本生態学会大会
Place of Presentation
岩手県立大学、岩手郡
Year and Date
2009-03-19
Description
「研究成果報告書概要(和文)」より
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 常緑広葉樹稚樹の光環境と開葉落葉フェノロジー2007
Author(s)
内田悟, 梅木清, 本條毅, 林恩美, 水崎大二郎, 宮川沙耶, 梅澤耕一, 矢澤佳子, 井本俊輔
Organizer
第54回日本生態学会大会
Place of Presentation
愛媛大学, 松山市
Year and Date
2007-03-22
Description
「研究成果報告書概要(和文)」より
-
-
-
[Presentation] Light environments and phenology of leaf flush and leaf fall in the seedlings of evergreen broad-leaved woody species.2007
Author(s)
Uchida S, Umeki K, Honjo T, Lim EM, Mizusaki D, Miyagawa S, Umezawa K, Yazawa Y, Imoto S
Organizer
54th Annual Meeting of the Ecological Society of Japan.
Place of Presentation
Ehime University, Matsuyama, Japan
Year and Date
2007-03-22
Description
「研究成果報告書概要(欧文)」より
-
[Presentation] Seasonal changes of an index of chlorophyll contents (SPAD values) in the seedlings of evergreen broad-leaved woody species.2007
Author(s)
Mizusaki D, Umeki K, Honjo T, Lim EM, Uchida S, Miyagawa S, Umezawa K, Yazawa Y, Imoto S
Organizer
54th Annual Meeting of the Ecological Society of Japan.
Place of Presentation
Ehime University, Matsuyama, Japan
Year and Date
2007-03-22
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
-
-
-
-
-
-
