アカマツの種子におよぼす動物の影響 : II.種子の生産と稚樹の形成
1975 年 25 巻 3 号 p. 141-148
詳細
1975 年 25 巻 3 号 p. 141-148
The process from seed input to seedling output of the Japanese red and black pine was investigated in the forests of Iwakura, Tanakami, and Kiryu during the period from seed fall to seedling emergence. Pine seeds produced are exposed to enemies such as squirrels on the tree and birds or field mice on the seedbed. A small part of the seeds was consumed by squirrels (2.6-13.9%) and most of the fallen seeds on the forest floor were attacked by birds and field mice (86-97%). Seed relocation due to rain showed remarkable difference between on litter and on naked soil. Seedlings emerged were very small compared with the number of seeds produced. This may be entirely due to animal damage. Seed-glueing method to catch clues responsible for animal agents seemed to be available.
