Environmental Factors Controlling the Distribution of Forest Plants with Special Reference to Floral Mixture in the Boreo-Nemoral Ecotone, Hokkaido Island

概要

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Effects of climatic factors on the plant distribution were examined by means of direct gradient analysis, and the relationship of forest flora with life form and phytogeographical distribution was examined. Subsequently, leaf phenology of forest plants were analyzed to evaluate the adaptive significance in relation to the environments in forest understory. In the boreo-nemoral forest ecotone, Hokkaido Island, northern Japan, co-occurrence of northern and southern plants in a certain forest site is more notable in the understory than in the crown, and this dates back to the late-Quaternary period, where the decrease in temperature associated with the glacial period forced the understory plants to adapt their life forms or leaf habits to snowcover and to light conditions of the interior forests.
北海道大学の論文
1993-03-25