The comparative study on the species composition of <i>Fagus crenata</i> Blume forests in Okushiri Island of southwestern Hokkaido and its surrounding area

DOI Web Site Open Access
  • NAMIKAWA Kanji
    Biological Laboratory, Sapporo Campus, Hokkaido University of Education
  • KITAMURA Keiko
    Hokkaido Research Centre, Forestry and Forest Products Research Institute, Forest Research and Management Organization
  • MATSUI Tetsuya
    Center for Biodiversity and Climate Change, Forestry and Forests Products Research Institute, Forest Research and Management Organization Faculty of Life and Environmental Science, University of Tsukuba
  • ISHIKAWA Yukio
    The Shirakami Research Center for Environmental Science, Hirosaki University

Bibliographic Information

Other Title
  • 北海道南西部奥尻島と周辺地域のブナ林の種組成に関する比較研究
  • ホッカイドウ ナンセイブ オクシリトウ ト シュウヘン チイキ ノ ブナリン ノ タネ ソセイ ニ カンスル ヒカク ケンキュウ

Search this article

Description

<p>This study compared the species composition of Fagus crenata forests between Okushiri Island of southwestern Hokkaido and its surrounding area using vegetation relevés.　We investigated species composition in 17 forest stands on Okushiri Island, 10 on the Oshima Peninsula and 14 in the northern Tohoku region, and obtained 41 phytosociological relevés.　Further, 7 relevés from the Japan Sea side of the Tohoku region were extracted from the literature.　Two vegetation types were classified on Okushiri Island by the TWINSPAN method:type I （including two sub-types Ia and Ib） and II.　Moreover, two vegetation types, each with two respective sub-types （A1, A2, B1 and B2）, were obtained by the TWINSPAN method applied to all relevés.　Each type I or II stands on Okushiri Island included in sub-type A1 and B1 vegetation, respectively.　Type A1 was identified in 13 stands of Okushiri Island type I vegetation and 2 stands in the northern region of the Oshima Peninsula, and was characterized by the occurrence of Ilex rugosa var. rugosa, which occurs exclusively in beech forests in the northern region of the Oshima Peninsula.　Further, elements of boreal forests, such as Betula ermanii var. ermanii, Clintonia udensis and Dryopteris expansa, were present in Okushiri Island type I vegetation, which is a floristic feature of beech forests in the northern region of the Oshima Peninsula.　On the other hand, species with high occurrence in the Japan Sea side of Honshu including the northern Tohoku region, such as Dryopteris sabaei, Arachniodes mutica, Padus grayana and Mitchella undulata, were frequently found in type A1 vegetation, which is another feature of Okushiri Island’s beech forests.　The remaining vegetation type, B1, on Okushiri Island consisted of 4 stands on Okushiri Island and 6 in the southern region of the Oshima Peninsula and the northern Tohoku region.　This vegetation type was characterized by the presence of differential species for the association distributed over the southern region of the Oshima Peninsula, which has a short snow-cover period, such as Mianthemum dilatatum, Carex conica and/or Disporum smilacinum as well as type A1 vegetation.　Consequently, the beech forests on Okushiri Island showed diverse floristic features, despite its small size, common to those in the northern region of the Oshima Peninsula, those in the Japan Sea side of Honshu, and those in southern region of the Oshima Peninsula.</p>

Journal

  • Vegetation Science

    Vegetation Science 38 (2), 175-190, 2021

    The Society of Vegetation Science

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top