大年寺山地辷地帯の植物群落

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1. We studied the structure of plant associations on the creep land in Dainenjiyama, Sendai. This region comprises two geological layers ; the gravel beds(Aobayamalayer)at the upper part, and the tuff beds(Dainenji-layer)at the lower part. 2. This creep land may be divided into 6 blocks from topographic characters. That is ; A-is the barefaced land of clayey soils at soil mass movement. C-is depressed ground between A and D, and is covered with dense vegetation. B-is an old crack ground between A and C, and is covered sparsely with shrubs. D-is the lifted land by soil mass-movement, and is crowded with shrubs and herbs. This block is situated on the front side of C. E_1-is the wall of a small gully. The associations of herbs are seen at the lower wet part where slump from D is laid down. E_2-is restless land on the front side of D, where new cracks are shown and is covered with shrubs. Earthflows are most frequently seen in this place. 3. The successional changes to the original forest(Pinus densiflora-Abies firma association)are found remarkably at the bareland, crack ground and the lifted land, viz. in A, B, E_1,E_2,and D. On the C block the patches of the original forest remain, and a good deal of seedlings and young plants of P. densiflora and A. firma are found there. The structure of the communities in each was analysed one after another in detail. 4. Plant succession on the creep land may be assumed as follow : (table) 5. As the first invaders on this creep land, we can note such plants : Rubus microphyllus, Clerodendron trichotomum, Callicarpa mollis, Miscanthus sinensis, Petasites japonicus, Polypara cordata, Equisetum arvense, Lysimachia elethroides, Polygonum Reynoutria, Lactuca stolonifera.
日本生態学会の論文
1952-06-15

大年寺山地辷地帯の植物群落

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