Vulnerability of larch trees to extreme climate events in permafrost ecosystem of Eastern Siberia

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K19950
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 63010:Environmental dynamic analysis-related
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Tei Shunsuke 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (40710661)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 樹木年輪 / 気候変動 / 極端気象 / 東シベリア / カラマツ / 脆弱性

Outline of Final Research Achievements

Due to the coronavirus disease (COVID-19) and the Russian-Ukrainian crisis, I am unable to conduct the originally planned field survey in Eastern Siberia. Therefore, I shifted to data analysis with tree-ring width chronologies of 33 sites in Eastern Siberia (60<N, 120<E<150) that are registered in the International Tree-Ring Data Bank. As a result, I found that sites with low resilience to past extreme climate events (especially extreme low temperatures) are predominantly distributed in the eastern part of eastern Siberia. In addition, the low resilience of sites located in the eastern part of eastern Siberia was found to be more pronounced in comparison with sites in central and far eastern Siberia.

Free Research Field

樹木年輪生態学

Academic Significance and Societal Importance of the Research Achievements

本成果は、全球的に理解が進んでいない極端気象に対する樹木応答・脆弱性について、近年の気候変動下で急変している東シベリア森林生態系を対象として評価したものであり、同生態系動態の理解の深化に貢献する。また、本成果は、生態系モデルの貴重な検証データとして利用可能であり、モデルの高度化を通して、将来の気候変動下における森林動態予測高度化への貢献が期待される。