Studies on the dynamics of trees in the natural forest of Kyoto University forest in Ashu (I) : Stand condition at the setting of the study area

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  • 京都大学芦生演習林の天然林における樹木の動態に関する研究 (I) : 試験区設定時の林況
  • 京都大学芦生演習林の天然林における樹木の動態に関する研究-1-試験区設定時の林況
  • キョウト ダイガク アシウ エンシュウリン ノ テンネンリン ニ オケル ジュ

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Abstract

The study area investigating for dynamics of trees in a natural forest was set in Kyoto university forest of Ashu. In this paper we discussed with the stand structure and dynamics of lower layer trees over two years after selective cutting. In this stand before selective cutting most of trees in upper layer were dominated by Cryptomeria japonica in plot 1 and by Fagus crenata in plot 2. Many of lower layer trees were occupied by tolerant species and remainders over from selective cutting, and pioneer species germinated after the cutting. Many new trees survived in the autumn were Clethra barvinervis, Lindera unbellata and Acer micranthum, which naturaly regenerated by seeds. High growing species of new trees were those of sprout regeneration type and large seed type. Of more than one growing season trees high mortality species were Rosa crataegifolius and Hydrangea hirta, which were sprout regeneration and aboveground part of the trees had only two or three years life span in a stand. Clethra barvinervis was high mortality as the seeds dispersed under the parent tree in clumped and germinated in patch.

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