抄録
In this study, I compared the species composition, species diversity, and stand structure of the Lithocarpus edulis plantation and the Castanopsis sieboldii forest in the Miura Peninsula, central Japan. The vegetation units identified using the phytosociological method were the L. edulis plantation and Ardisio-Castanopsietum sieboldii. Compared with Ardisio-Castanopsietum sieboldii, it was found that the species composition of the L. edulis plantation was characterized by the presence of L. edulis and Prunus speciosa and the absence of the many of the component species of Ardisio-Castanopsietum sieboldii (e. g., Ilex integra, Camellia japonica, and Eurya japonica). The number of species per 100 m² , the number of species of shrub layer and herb layer, the number of species of trees and lianas, a, and H' in the L. edulis plantation were significantly lower than those in the Ardisio-Castanopsietum sieboldii. The number of seed-origin and sprout-origin juveniles (0.3 m < height < 2.0 m) of L. edulis in the L. edulis plantation was significantly higher than those in the Ardisio-Castanopsietum sieboldii. Conversely, the number of sprout-origin juveniles of C. sieboldii and Quercus acuta was significantly lower in the L. edulis plantation than in the Ardisio-Castanopsietum sieboldii. My results suggest that the L. edulis plantation regenerate from the sprout-origin juveniles of L. edulis and maintain low species diversity.
