ツガ天然林の更新 : I.樹幹解析によって推定した成熟林分の動態
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SUZUKI, Eizi (Department of Biology, Faculty of Science, Osaka City University). 1979. Regeneration of Tsuga sieboldii forest. I. Dynamics of development of a mature stand revealed by stem analysis data. Jap. J. Ecol., 29 : 375-386. The process of regeneration was studied in a mature Japanese hemlock stand on Kubotani-yama, Kochi Pref., Shikoku, based on the stem analysis data obtained by clear-felling a 400 m^2 plot. The age distribution in trees and the restored change in their growth rates during sapling stage indicated that a strong disturbance and subsequent regeneration occurred some 270 years ago. The DBH census on wider areas made by the district forestry office suggested that such a large-scale regeneration might have taken place in mosaics of a few to several tens hectares, possibly due to the destruction by strong typhoons. Local disturbances and regeneration on a much smaller sacle were also presumed. The hemlock forest in this district seemed to have been maintained by these two types of regeneraton. Component species of the four layers (tall tree, mid-tree, small tree and shrub) were found to have respectively different growth rates, age limits and regeneration cycles.
- 日本生態学会の論文
- 1979-12-30
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