Landscape level and stand level factors affecting the intensity of trunk damage by Sika deer (Cervus nippon)

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  • INOUE Tomoki
    Graduate School of Bioresource and Bioenvironment Sciences, Kyushu University:(Present office)Yukuhashi branch office of Fukuoka Prefecture
  • MITSUDA Yasushi
    Forestry and Forest Products Research Institute
  • MURAKAMI Takuhiko
    Faculty of Agriculture, Niigata University
  • MIYAJIMA Junji
    Forestry Promotion Division, Depertoment of Agriculture Forestry and Fisheries, Kumamoto Prefctural Government
  • MIZOUE Nobuya
    Faculty of Agriculture, Kyushu University
  • YOSHIDA Shigejiro
    Faculty of Agriculture, Kyushu University

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Other Title
  • 広域空間レベルおよび林分レベルで捉えたニホンジカによる人工林剥皮害の発生要因
  • コウイキ クウカン レベル オヨビ リン ブン レベル デ トラエタ ニホンジカ ニ ヨル ジンコウリンハクヒガイ ノ ハッセイ ヨウイン

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Abstract

To reveal factors affecting the intensity of trunk damage caused by sika deer (bark-stripping and fraying), we developed regression models to explain the bark-stripping intensity in Japanese cypress (Chamaecyparis obtusa) plantation forests in the Kuma district of Kumamoto Prefecture. We applied the zero-inflated negative binomial model to point-surveyed trunk damage data collected by Kumamoto Prefecture using landscape level and stand level factors as explanatory variables. The best fitted model had three explanatory variables, which were the ratio of plantation forest area around the surveyed sites and distance to the nearest road (landscape level factor), and the amount of understorey vegetation (stand level factor). This result suggested that not only landscape level factors but also stand level factors should be considered when formulating plans to prevent trunk damage damage by Sika deer in plantation forests.

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