1999 Volume 16 Issue 2 Pages 131-140
A phytosociological survey was carried out on Quercus mongolica var. grosseserrata forest in Nishitsugaru district, Aomori Prefecture. Two associations were recognized, based on floristic composition. The distributions of the two associations are closely related to the precipitation level, total snowfall and topography. The first association, Tripetaleio-Quercetum mongolicae, is distributed in mountainous areas where upheaval, denudation and dismantling of the ground frequently occurs. This association is found only in areas of higher precipitation and total snowfall. The second association, Lindero membranaceae-Quercetum mongolicae grosseserratae, is found widely and tends to be distributed mainly on marine terrace to the west or north of the area investigated. The floristic composition of these associations was compared with that of Quercus mongolica var. grosseserrata forests investigated by other researchers.
