於靑島 海松林의 植生構造에 關한 硏究 = A Study of Vegetation Structure of Pinus thunbergii Forest on O˘cho˘ng Island

다국어 초록 (Multilingual Abstract)

This study was carried out to understand the vegetation structure of Pinus thunbergii forest on O˘cho˘ng island and the results were summarized as following:
1. The most dominant species on O˘chong island was Pinus thunbergii and the Ⅰ.Ⅴ. of Pinus thunbergii in the northern aspect showed higher than that of southeren aspect. Quercus acutissima was emerged to the Pinus thunbergii forest and the Ⅰ.Ⅴ. of Quercus acutissima was higher than that of Pinus thunbergii in shrub layer. In addition, the Ⅰ.Ⅴ. of Eurya japonica was the highest among shrubs. The Ⅰ.Ⅴ. of Castanopsis cuspidata var. sieboldii was the highest among evergreen broad leaved trees.
2. The sites investigated were grouped by Cluster Analysis into Pinus thunbergii forest and mixed-species forest in which Castanopsis cuspidata var. sieboldii, Carpinus coreana, and Quercus acuta are dominant. The factor affecting the most remarkable difference might be the silt between Pinus thunbergii forest and the mixed-species forest.
3. As results of COA Odination, community ordination was appeared to Pinus thunbergii area and mixed-species area. In case of the species ordination all the woody species were closely coordinated except Quercus acuta, Meliosma oldhamii, Quercus variabilis.
Sand and organic matter were appeared as the most influencing factors to Ⅱ and Ⅲ axes, respectively.
4. The Ⅰ.Ⅴ. of Pinus thunbergii might be decreased by scarce reproduction in the shrub layer. On the other hand, Quercus acutissima, Castanopsis cuspidata var. sieboldii, and Carpinus coreana would increase and succession would be completed in some area by those species.
5. The content of NaCl in soil was much higher than that of land. Soil pH showed significant difference at 5% between the northern and the southern aspect and also sand, silt, Avail. P_2O_5. K^+, and Na^+ were showed significance 5% between Pinus thunbergii forest and mixed-species forest in which Castanopsis cuspidata var. sieboldii, Carpinus coreana, Quercus acuta are dominant.
6. The mainly emergent woody species in O˘chong island - Pinus thunbergii, Quercus acutissima, Q.acuta, Castanopsis cuspidata var. sieboldii, Carpinus coreana. Eurya japonica, Callicarpa japonica, Vibumum dilatatum, and so on - are strong in salinity. Threrfore, the vegetation of O˘chong island was severely influenced by sea breeze and NaCl in soil.