新宮(紀伊半島)および室戸岬の完新世植生史 : とくにシイ林の成立について

概要

論文の詳細を見る
A palynological study was made on the Holocene sediments of two sites in south western Japan, Ukishima-no-mori moor, Shingu City, Wakayama Prefecture, and the Mutotsu River, Muroto City, Kochi Prefecture. At Ukishima-no-mori moor, the pollen diagram was divisible into three local fossil pollen assemblage zones, (1) the Quercus (Lepidobalanus)-Carpinus zone, (2) the Castanopsis-Quercus (Cyclobalanopsis) zone, and (3) the Cryptomeria-Pinus zone. It was estimated that broad-leaved deciduous forest had changed into lucidophyllous forest prior to the KAh ash fall which occurred about 6,300 years ago and that lucidophyllous forest, especially Castanopsis-type, would be dominant around this moor. This transitional age preceeded that occurring in Central south western Japan. At the Murotsu River, it seemed that the Castanopsis forest, which was accompanied by Podocarpus and Myrica spp., reached its climax phase about 8,500 years ago. These findings may be explained by the fact that in the early Holocene, the surveyed areas were situated on the Pacific coast and had been influenced by the warm Kuroshio current.
日本生態学会の論文
1988-04-30