Water and carbon transport within trees and seasonal and environmental response characteristics of tree growth

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06156
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 40010:Forest science-related
• Research Institution: Forest Research and Management Organization
• Principal Investigator: Takanashi Satoru 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 (90423011)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 炭素動態 / パルスラベリング / 樹液流 / 光合成 / 炭素貯留

Outline of Final Research Achievements

In order to clarify the relationship between the growth and decline processes of trees and the carbon and water dynamics within trees, 13CO2 pulse labeling experiments were conducted on several trees to clarify the seasonal changes in the carbon transport rate within trees and their environmental response characteristics.
The 13CO2 pulse labeling experiments revealed that the carbon transport rate was generally slower in conifers and faster in hardwoods, and that the carbon transport and sequestration characteristics were clarified during regeneration, which have not been studied extensively.

Free Research Field

生物環境物理学

Academic Significance and Societal Importance of the Research Achievements

13CO2パルスラベリング実験により、炭素輸送速度はおおむね針葉樹で遅く、広葉樹で速いという結果が得られる一方で、樹木の成長段階や季節・環境条件により、様々なパターンの炭素輸送・貯留特性があることが明らかとなった。本研究により得られた炭素輸送特性を樹木成長モデルに組み込むことによって、森林炭素動態モデルの精緻化に寄与できると考えられる。