分布北限域のスダジイ林内における種子散布と実生および稚樹の分布
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概要
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Seed dispersal, seedling demography and the relationship between seedling position and the upper layers of the tree crown were studied in a Castanopsis cuspidata var. sieboldii forest on Mt. Nishikanasa, Ibaraki Prefecture, central Japan. For four years (1988-1991), dispersed sound seeds of tree species were collected at different intervals. There were differences in the numbers of seedlings that emerged on the forest floor as well as the position of seedlings in relation to the crown projection for each tree species. The results indicated that the seedling bank of C. cuspidata var. sieboldii can be maintained by changes in leader shoot and by sprouting of new shoots after damage within 10 years. Though C. cuspidata var. sieboldii and Abies firma seedlings appeared under the subtree layer crown, the positions of their seedlings in the shrub layer suggested that they survived and grew successively in places without subtree layer crowns. Acer palmatum var. amoenum and Carpinus laxiflora seedlings cannot survive if upper-layer crowns persist, and their seedling bank can be maintained if new seedlings are supplied. For Quercus salicina, seedlings can grow everywhere except for places covered by all crown layers.
- 日本生態学会の論文
- 1994-04-20