ロシア極東沿海地方南部に分布するモンゴリナラ－ヤエガワカンバ林の構造，更新とヤエガワカンバの植生地理学的意義

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  • ロシア キョクトウ エンカイ チホウ ナンブ ニ ブンプスル モンゴリナラ ヤエガワカンバリン ノ コウゾウ コウシン ト ヤエガワカンバ ノ ショクセイ チリガクテキ イギ

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Abstract

Structure and regeneration dynamics of the Quercus mongolica-Betula davurica forest in the southern most Primorie, the Russian Far East were documented, and vegetation geographical significance of Betula davurica was discussed. Four stands with different developmental stages, from young small-sized stand to fairly mature stand, were surveyed. Quercus mongolica maintained the most dominance throughout four stands with continu-ous regeneration. Betula davurica maintained next most dominance throughout four stands, although the regen-eration of this species was rather discontinuous. It was concluded that B . davurica was one of the major climax species of the continental type of the deciduous broadleaved forest, contrasting with the generally accepted view that Betula trees are usually shade-intolerant pioneer species appearing in an earlier stage of forest succession and disappearing in the climax stage. Finally vegetation geographical importance of B . davurica was stressed in discussing the geographical comparison and the reconstruction of vegetation history of the deciduous broadleaved forests of Japan.

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