柏崎市宮川神社々叢の極相林
スポンサーリンク
概要
- 論文の詳細を見る
Niigata Prefecture is situated at about the middle of the coast of the Japan Sea. The coast-line of this prefecture is 298.0 kilometres long, being the longest in Japan. On the coast, which is considerably eroded by the northwestern waves in winter, are many sand dunes. The Hakusan Shrine at Noo in the southern part of this long coast-line, the Miyakawa Shrine at Kashiwazaki in the middle part, and the Yawata Shrine at Katsuki in the north. Each shrine has a relict stand of forest. As for the climate, most parts of this prefecture belong to the cool temperate region from the viewpoint of plant geography. The plant community of the climax forest at the Miyakawa Shrine was investigated. This forest area is classified into three stands, each dominated respectively by Neolitsea sericea and Zelkova serrata, Pinus Thunbergii and Quercus mongolica var. grosserata, and Cryptomeria japonica. The structure and composition were studied by the nest-quadrat method of 5×5m and 2×2m, the summed dominance ratio based on cover and frequency was described. The most important stand is the Neolitsea sericea community which is kept as a natural climax ; the other two stands are not so natural. It is very interesting ecologically that Neolitsea sericea, one of evergreen tree species in the warm-temperate region makes the climax forest, being in contact with the summer-green forest dominated by a deciduous tree, Quercus mongolica var. grosserata, in the cool-temperate region in Japan. This forest stand indicates a kind of ecotone of the coastal forest. The Neolitsea sericea forest belongs to Shiion Sieboldii and is equivalent to the Machilus Thunbergii-Polystichum aculeatum var. japonicum association widely distributed in the coastal area of the warm-temperate region of Japan.
- 日本生態学会の論文
- 1967-02-01