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Elevational changes in production and soil respiration rates in subalpine forests

Research Project

Project/Area Number 21K06331
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45040:Ecology and environment-related
Research InstitutionShinshu University

Principal Investigator

Takahashi Koichi  信州大学, 学術研究院理学系, 教授 (80324226)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords土壌呼吸 / 競争 / 森林動態 / 炭素循環 / 標高傾度 / 生産量 / 胸高断面積合計値 / 細根 / 純一次生産量 / 大型木質リター
Outline of Research at the Start

山岳環境の日本では,寒冷な高標高では樹木の成長が低いため,CO2吸収である森林の純一次生産量(NPP)は低い.また,土壌面からのCO2排出である,枯死木などの大型木質リター(CWD)の分解による呼吸(RCWD)と土壌中の微生物や根の呼吸(RS)も低い.温暖化によってNPPだけでなくRCWDとRSも増加するため,高標高の森林がCO2の吸収源または排出源になるか不明である.本研究では標高傾度にそった個体の成長・死亡の長期観察データを用いてNPP, RSとRCWDの測定,さらにモデルによって標高傾度にそったCO2吸収に対する温暖化の影響予測を行う.

Outline of Final Research Achievements

We investigated the production and soil respiration rate of subalpine forests along an elevation gradient. (1) The results showed that growth decreased due to competition at all elevations, and that the growth rate was positively correlated with the temperature during the growth period and negatively correlated with the precipitation. Furthermore, a decrease in growth rate increased the mortality rate. (2) Soil respiration rate at each elevation could be estimated from soil temperature, soil moisture, and forest biomass. (3) At all elevations, root respiration rate and microbial respiration rate were positively correlated with soil temperature. Fine root mass decreased with higher elevations, but it was revealed that root respiration rate per fine root mass was higher at higher elevations. (4) Seasonal and diurnal variations in soil respiration rates could be reproduced by soil temperature and soil moisture.

Academic Significance and Societal Importance of the Research Achievements

この研究では,樹木個体の成長率,死亡率,そして土壌呼吸速度を森林のバイオマス,個体間競争と気象条件から推定できることを示した.樹木個体の成長率と死亡率に対する気象の影響については,まだデータ数が少ないため,推定精度は高くないが,今後,データを積み上げることで,より精度が高まることが期待される.樹木の成長に対する気象の影響は年輪年代学的な手法でよく研究されてきたが,一般的に行われている毎木調査のデータから推定できれば,今後,多くの森林データに適用でき,また温暖化の影響予測にも利用できる.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (2 results)

  • [Journal Article] Seasonal and diurnal variations in soil respiration rates at a treeline ecotone and a lower distribution limit of subalpine forests2024

    • Author(s)
      Takeda Soichiro、Makita Naoki、Takahashi Koichi
    • Journal Title

      Journal of Plant Research

      Volume: 137 Issue: 2 Pages: 179-190

    • DOI

      10.1007/s10265-023-01516-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Five-year measurement data along a 1200 m elevational gradient reveals that global warming increases soil respiration2023

    • Author(s)
      Takeda Soichiro、Majima Ryota、Makita Naoki、Takahashi Koichi
    • Journal Title

      Frontiers in Forests and Global Change

      Volume: 6 Pages: 1-12

    • DOI

      10.3389/ffgc.2023.1145474

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Diurnal and seasonal variations in photosynthetic rates of dwarf pine <i>Pinus pumila</i> at the treeline in central Japan2022

    • Author(s)
      Shimada Ryuto、Takahashi Koichi
    • Journal Title

      Arctic, Antarctic, and Alpine Research

      Volume: 54 Issue: 1 Pages: 1-12

    • DOI

      10.1080/15230430.2021.2022995

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluating the soil microbe community‐level physiological profile using <scp>EcoPlate</scp> and soil properties at 33 forest sites across Japan2022

    • Author(s)
      Nakamura et al.
    • Journal Title

      Ecological Research

      Volume: 37 Issue: 3 Pages: 432-445

    • DOI

      10.1111/1440-1703.12293

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Competition and disturbance affect elevational distribution of two congeneric conifers2022

    • Author(s)
      Takahashi Koichi、Ikeda Keigo、Okuhara Isao、Kurasawa Rintaro、Kobayashi Suguru
    • Journal Title

      Ecology and Evolution

      Volume: 12 Issue: 2

    • DOI

      10.1002/ece3.8647

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Productivity does not decrease at the climate extremes of tree ranges in the Japanese archipelago2021

    • Author(s)
      Takahashi Koichi
    • Journal Title

      Oecologia

      Volume: 197 Issue: 1 Pages: 259-269

    • DOI

      10.1007/s00442-021-05015-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 亜高山帯における標高傾度にそった土壌呼吸の変化とその要因2023

    • Author(s)
      増田春樹,高橋耕一
    • Organizer
      日本生態学会第70回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 異なる標高で優占するモミ属2種の分布の形成:競争と攪乱による更新特性の変化2022

    • Author(s)
      高橋耕一, 池田圭吾, 奥原勲, 倉澤倫太郎, 小林克
    • Organizer
      日本生態学会第69回大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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