Distance Dependent Emergency of Beech (Fagus crenata) Seedlings from Mother Trees in Heavy Snowfall Area: The Effects of Snow Covers to Protect Seeds from Predation by Rodents.

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  • Koyama H.
    Department of Biological Environment, Faculty of Agriculture, Yamagata University
  • Takeuchi K.
    Department of Biological Environment, Faculty of Agriculture, Yamagata University
  • Takahashi N.
    Department of Biological Environment, Faculty of Agriculture, Yamagata University
  • Ishii T.
    Heisei Riken. Co., Ltd.

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Other Title
  • 豪雪地帯のブナ林における母樹からの距離に応じた当年生実生の発生数―種子捕食に対する積雪の保護効果の検証―
  • ゴウセツ チタイ ノ ブナリン ニ オケル ボジュ カラノ キョリ ニ オウジタ トウネンセイ ミショウ ノ ハッセイスウ シュシ ホショク ニ タイスル セキセツ ノ ホゴ コウカ ノ ケンショウ
  • The Effects of Snow Covers to Protect Seeds from Predation by Rodents
  • —種子捕食に対する積雪の保護効果の検証—

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Abstract

Seedling banks in a beech forest were scarcely found around stems in snowy regions. Since snow cover prevents feeding activity of rodents, we considered that the seed predation might occur intensively around stems where snow pack tends to disappear earlier in spring. In order to verify this hypothesis, emergence of current seedlings derive from seeds dispersed in a previous good crop year were investigated. Although the number of dispersed seeds did not depend on distance from the mother tree, few seedlings occurred around stems and seedling banks tend to establish 2∼3 m apart from mother trees. Germination failure due to fungi attack or desiccation was negligible and irrespective of the distance from mother trees. These results suggested that snow cover prevents rodents from seeds feeding and played an important role to determine the distribution pattern of seedling banks in beech forests.

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