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[MGI20-P03] The environmental condition of small subalpine coniferous forest on Mt. Aomatsubayama, northern Japan
Keywords:Coniferous forest, Abies mariesii, Location environment, Landform, Soil condition
In this site, there are few mixed forest of A.mariesii and other plants. Therefore the boundary of A.mariesii forest is sharply defined. Most of the A.mariesii forests distributed in a gentle slope on the summits (about Alt.1300-1360 m). The dominance vegetations are S. kurilensis grasslands, Fagus crenata and Betula ermanii broad leaf forests. The soil profiles in these vegetations resembled each other regarding the existence of humic soil layer before To-Cu tephra layer (6ka:Machida and Arai, 1992). The soil in the A.mariesii forest area had higher moisture content than that in other vegetation area.
As these results, it’s considered that A.mariesii forest is distributed in a gentle slope on the summits and high soil water area. This means Pseudo-Alpine zone is formed by the localized-distribution of A.mariesii forest on high soil water area.