富士山北西斜面七太郎尾根におけるカラマツ低木林の成立と斜面形成

概要

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Along Shichitaro-Ridge on the northwestern slope of Mount Fuji, a larch scrub community is scattered in patches, forming an island, where the tree line is 2, 700 meters in altitude. This paper reports the results of an investigation of the tree height and diameter, tree age, and distribution of buried seeds, as a clue to the origins of the larch scrub community.The tree height and diameter change with altitude in spite of its short stature. However, tree age, number of buried seeds, and number of seed-lings are not always dependent upon altitudinal change. These facts lead us to assume that the present island-like scrub community has been caused by unstable accumulation covering the area. The existence of a buried A-horizon above the present forest line and the fir trees mingled with the scrub suggest that a well-developed forest community was formed here, was buried in the slope deposited subsequently, and then was turned into scrub.
日本第四紀学会の論文