東海地方の丘陵地にみられるシデコブシ群落とその立地について

抄録

The vegetation and microtopography of a hilly land region were studied in the southeastern part of Gifu Prefecture, central Japan, to specify the habitat of the endemic plant Magnolia tomentosa and its community. Four types of plant community were distinguished at the second level of the TWINSPAN classification : the M. tomentosa-Alnus japonica community, the M. tomentosa-Ilex nipponica community, the Quercus serrata community and the Pinus densiflora community. The first two of these plant communities were separated from the others at the first level of the classification and were always characterized and sometimes dominated by M. tomentosa. Based on DECORANA analysis, these plant communities were presumed to have differentiated through climatic differences corresponding to differences in the vegetation zone and soil moisture of their habitats. However, they always inhabit wet sites on a particular micro-landform unit, the "channelway", which extends from the lower edge of the head of a valley.