Topography and Geology of Wild Stands of Magnolia tomentosa, Acer pycnanthum and Chionanthus retusus in Japan (Preliminary Report)

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  • シデコブシ・ハナノキ・ヒトツバタゴの自生地の地形と地質(予報)
  • シデコブシ ハナノキ ヒトツバタゴ ノ ジセイチ ノ チケイ ト チシツ ヨホウ

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Topography and geology of wild stands of endangered plants, Magnolia tomentosa (M. t.), Acer pycnanthum (A. p.), and Chionanthus retusus (Ch. r.) are studied. These three trees, which belong to the Tokai hilly land element, are mainly distributed in wetlands of the Tokai region in Japan. The habitats of M. t., A. p., and Ch. r. are analyzed on the basis of various field survey data such as on location, altitude, topography, geology, and water level.<BR>The results are as follows.<BR>1. The habitats of the three species have slightly different characteristics in terms of altitude, and relations to topography, geology, and water level.<BR>1) altitude : M. t. (low) → A. p. · Ch. r. (high) <BR>2) inclination : M. it (small) → A. p. · Ch. r. (large) <BR>3) height above water level : M. t. (small) →A. p. · Ch. r. (large) <BR>2. Each habitat consists of various rocks and strata such as gravels of the Tokai group, Mesozoic rocks, and granites and so on, contrary to opinions that habitats are closely related to the Toki gravel bed of the Tokai group.

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