関東平野における樹木衰退の1999年~2001年の状況  [in Japanese] The conditions of tree and forest declines of the Kanto Plains in 1999-2001  [in Japanese]

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Abstract

関東地方の丘陵部を含む平野部全域を対象として,スギなどの樹木について衰退の現況を,目視による樹木衰退度判定法によって調査した。その結果,スギの衰退が最も顕著であり,ヒノキなどの常緑針葉樹類,イチョウ,ケヤキなどにも衰退が認められた。いっぽう,メタセコイアおよびヒマラヤスギでは衰退個体がほとんど見いだせなかった。スギの衰退は,関東平野のほぼ全域で認められ,関東平野の北西部に位置する前橋市周辺や熊谷市周辺,および久喜市周辺,これらに隣接する群馬県下および埼玉県下の利根川沿いの地域で特に著しかった。次いで,水戸市北方の那珂川や久慈川沿いの地域,および銚子市周辺の太平洋に面した地域で衰退度が高く,千葉市周辺および町田市周辺でも比較的衰退度が高かった。

The present conditions of the tree and forest declines were investigated all around the Kanto Plain, central Japan. The decline of Criptomeria japonica was the most remarkable. The declines of evergreen conifer species (Chamaecyparis obtuse, Pinus densiflora, P. thunbergii, Abies firma, Tsuga sieboldii, Podocarpus macrophyllus, Torreya nucifera, Chamaecyparis pisifera, Picea sp., and so on), Ginkgo biloba, and Zelkova serrata were observed. However, declines were hardly observed Matasequoia glyptostroboides and Cadrus deodara. The decline of Criptomeria japonica was observed in the whole area of the Kanto Plain. Especially, the heaviest decline areas of all are an area along Tone River in Gunma Prefecture and Saitama Prefecture, northwestern part of the Kanto Plain, areas along Naka River, and Kuji River and an area around Choshi city, faced to the Pacific Ocean. There were also heavier declined trees around Chiba city and Machida city.

Journal

  • Japanese Journal of Forest Environment

    Japanese Journal of Forest Environment 44(2), 53-62, 2002

    The Japanese Society of Forest Environment

References:  29

Cited by:  3

Codes

  • NII Article ID (NAID)
    110007088899
  • NII NACSIS-CAT ID (NCID)
    AN00124077
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0388-8673
  • NDL Article ID
    6440751
  • NDL Source Classification
    ZR21(科学技術--農林水産--林産)
  • NDL Call No.
    Z18-493
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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