くじゆう火山の成層草原土壌および崩積森林土壌の花粉分析

概要

論文の詳細を見る
Two sites of volcanic ash deposit were studied by polien analysis : Site I being a Miscanthus-grassland dominated by Arundinaria pygmasa, on the flat top of an undulating platean surface, 870 m above the sea-level, and Site II a Quercus crispula-Symplocos coreana-Circaea alpine-forest along the valley at the foot of Mt. Mimata, 1140 m above the sea-level. The pollen flora is influenced by the present vegetation down to the limit of 10 cm from the surface in site I, and 15-25 cm in site II, which are indicated by the presence of Cryptomeria introduced to this volcanic region by man. The deposition of volcanic ash has made the habitat drier and exerted an influence on the historical development of the plant-communities. The vegetation was anihilated at least twice in the past. In site I (grassland) no progressive stage deeper than the present one has been recognized. In site II (colluvial forest soil) The Ulmion has changed to the present oak forest dehydrated by the ash deposits. When the pollen spectra of the volcanic ash soils in the Kuzyu-volcanoes and the glacial deposits in Europe are compared, which have occurred probablly contemporaneously, a good analogy is susceptible, and one can conclude that in Kuzyu the Ulmion has much declined against the prospecting Pinion.
日本生態学会の論文
1972-10-20