Statistical modeling to analyze the process of tree growth and mortality due to resource competition

• Project/Area Number: 26540009
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Statistical science
• Research Institution: Hokkaido University
• Principal Investigator: Kubo Takuya 北海道大学, 地球環境科学研究科(研究院), 助教 (80344498)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
• Keywords: 森林動態 / 樹木の成長 / 樹木の死亡 / 開空度 / 森林生態系 / 樹木の直径成長 / 植物個体内の資源分配

Outline of Final Research Achievements

We developed statistical models to estimate mortalities of tree branches, growth rates of trunk and foliage depending of three dimensional light distribution in forest. The light distribution was reconstructed based on an open data, Inabu experimental forest of Nagoya University. Reconstructed forest using OpenGL library allowed us to know the relationship between forest structure and light resource distribution. We also developed a time-series data of tree ring to know the relationship between the external environment and the radial growth of trees.

Research Products

• [Journal Article] Long-term changes in earlywood width and radial growth of Quercus crispula under climate change (2015)
  • Author(s): Eri Nabeshima, Takuya Kubo, Koh Yasue, Tsutom Hiura, Ryo Funada
  • Journal Title: Trees Volume: 29 Issue: 4 Pages: 1273-1281
  • DOI: 10.1007/s00468-015-1206-3
  • Peer Reviewed
• [Presentation] 時系列データの統計モデリング入門 (続) (2016)
  • Author(s): 久保拓弥
  • Organizer: 日本生態学会第63回大会
  • Place of Presentation: 仙台国際ホール
  • Year and Date: 2016-03-23
• [Presentation] GLMMの紹介 (2015)
  • Author(s): 久保拓弥
  • Organizer: 第 2 回日本社会心理学会春の方法論セミナー
  • Place of Presentation: 上智大学
  • Year and Date: 2015-03-25
  • Invited
• [Presentation] 時系列データの統計モデリング入門 (2015)
  • Author(s): 久保拓弥
  • Organizer: 日本生態学会第63会大会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2015-03-19
• [Presentation] データ解析のための統計モデリング入門 (2015)
  • Author(s): 久保拓弥
  • Organizer: 日本行動計量学会 春の合宿セミナー2015
  • Place of Presentation: 東京大学
  • Year and Date: 2015-03-07
  • Invited
• [Book] 岩波データサイエンス Vol.1 (2015)
  • Author(s): 伊庭幸人，久保拓弥，伊藤宏樹，松浦健太郎，高柳慎一，林隆介，麻生英樹，とん，円城塔
  • Total Pages: 144
  • Publisher: 岩波書店