Changes in growth limiting factors of above- and below ground part of trees growing on permafrost due to climate change

2017 Fiscal Year Final Research Report

• Project/Area Number: 26304026
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Forest science
• Research Institution: Shinshu University
• Principal Investigator: Yasue Koh 信州大学, 学術研究院農学系, 准教授 (00324236)
• Co-Investigator(Kenkyū-buntansha): 城田 徹央 信州大学, 学術研究院農学系, 助教 (10374711) ; 檀浦 正子 京都大学, 地球環境学堂, 助教 (90444570)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 気候変動 / 年輪年代学 / 周極域 / 永久凍土 / 土壌呼吸 / アロメトリー / 気候応答 / 同位体ラベリング

Outline of Final Research Achievements

The growth limiting factors of above- and below ground part of Picea mariana, Larix sibilica and Pinus sibirica trees growing on permafrost and non-permafrost in various site in circumpolar regions were investigated. We utilized dendrochronological techniques, growth patterns of trunk, branch and root observation and stable isotope labeling techniques. The tree growth and carbon balance of forests on permafrost were mainly regulated by low temperature underground which limit the growth and functions of roots. In addition, frozen ground in spring season cause water deficit stress or flooding stress in some sites. The way of influence varies depending on climate and geological conditions as well as tree species.

Free Research Field

木質科学