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Effects of spatiotemporal fluctuations in soil moisture in forest catchments on nitrification rate and nitrate discharge

Research Project

Project/Area Number 18K05721
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40010:Forest science-related
Research InstitutionForest Research and Management Organization (2020)
The University of Tokyo (2018-2019)

Principal Investigator

Oda Tomoki  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 (70724855)

Co-Investigator(Kenkyū-buntansha) 大手 信人  京都大学, 情報学研究科, 教授 (10233199)
磯部 一夫  東京大学, 大学院農学生命科学研究科(農学部), 助教 (30621833)
熊谷 朝臣  東京大学, 大学院農学生命科学研究科(農学部), 教授 (50304770)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords土壌水分 / 硝化 / 森林斜面 / NO3-濃度 / 渓流水質 / 森林流域 / 硝酸イオン / 硝酸態窒素流出
Outline of Final Research Achievements

Soil moisture content, soil physics, NO3- concentration, microbial content, and nitrification rate were measured in the upper, middle, and lower slopes of three forest catchments. We found the relationship between soil moisture and the NO3- production rate in surface soil. We also found that the spatial distribution of soil physics influences the formation of the spatial distribution of soil moisture, thereby determining the spatial distribution of NO3- production rate. From these results, it was suggested that the spatial distribution of soil physics determines the NO3- production rate in surface soil and the hydrological process involved in the transport of NO3- and contributes significantly to the formation of streamwater NO3-concentration.

Academic Significance and Societal Importance of the Research Achievements

気候変動や森林撹乱による森林生態系における物質循環変動がNO3-流出・水質悪化を引き起こすことが懸念されているが、森林流域からのNO3-流出の正確な予測は、未だに困難である。本研究によって、森林流域の土壌水文特性の空間分布が土壌水分の空間分布や微生物活動に影響を与えることにより、NO3-生成量を決定する重要な要素であることを明らかにした。また、火山灰土壌の被覆が日本の森林流域における土壌水分、NO3-生成量の分布と渓流水NO3-濃度形成に影響を与えていることを示した。これらの知見は森林流域からのNO3-濃度形成の予測に貢献するものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Int'l Joint Research] University of Virginia/US Forest Service/Case Western Reserve University,(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Effects of bedrock groundwater discharge on spatial variability of dissolved carbon, nitrogen, and phosphorous concentrations in stream water within a forest headwater catchment2021

    • Author(s)
      Egusa Tomohiro、Kumagai Tomo'omi、Oda Tomoki、Ohte Nobuhito
    • Journal Title

      Hydrological Processes

      Volume: 35 Issue: 1

    • DOI

      10.1002/hyp.13993

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of changes in canopy interception on stream runoff response and recovery following clear-cutting of a Japanese coniferous forest in Fukuroyamasawa Experimental Watershed in Japan2021

    • Author(s)
      Oda Tomoki, Egusa Tomohiro, Ohte Nobuhito, Hotta Norifumi, Tanaka Nobuaki, Mark B Green, Suzuki Masakazu
    • Journal Title

      Hydrological Processes

      Volume: - Issue: 5

    • DOI

      10.1002/hyp.14177

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 森林からの物質の流出をはかる2020

    • Author(s)
      小田智基
    • Journal Title

      森林科学

      Volume: 89 Pages: 30-31

    • NAID

      130007868881

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Consequences of microbial diversity in forest nitrogen cycling: diverse ammonifiers and specialized ammonia oxidizers2020

    • Author(s)
      Kazuo Isobe, Yuta Ise, Hiroyu Kato, Tomoki Oda, Christian E Vincenot, Keisuke Koba, Ryunosuke Tateno, Keishi Senoo, Nobuhito Ohte
    • Journal Title

      The ISME journal

      Volume: 14 Issue: 1 Pages: 12-25

    • DOI

      10.1038/s41396-019-0500-2

    • NAID

      120006800755

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The effects of canopy alteration induced atmospheric deposition changes on stream chemistry in Japanese cedar forest2019

    • Author(s)
      Tomoki Oda, Naohiro Imamura, Tomohiro Egusa, Nobuhito Ohte
    • Journal Title

      Forest Ecology and Management

      Volume: 448 Pages: 85-93

    • DOI

      10.1016/j.foreco.2019.05.058

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 日本と米国の森林伐採試験から見える森林の水源涵養機能2020

    • Author(s)
      小田智基、Mark Green、Lawrence Band ・ Todd Scanlon ・ 清水貴範・Stephen Sebestyen・ Kevin McGuire・ Mary Adams・ 勝山正則・ 大手信人
    • Organizer
      日本森林学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Predicting soil water retention using soil chemical properties2020

    • Author(s)
      Kazumichi Fujii, Tomoki Oda, Naoko Tokuchi, Yoshiyuki Inagaki, Chie Hayakawa, Jun’ichiro Ide, Frouz Yan.
    • Organizer
      日本森林学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Spatial variation in soil physical properties and effects on NO3- production in soil on forest hillslopes2020

    • Author(s)
      Tomoki Oda, Megumi Kuroiwa, Naoya Fujime, Kazuo Isobe, Naoya Masaoka, Kazumichi Fujii, Hiroto Toda, Nobuhito Ohte
    • Organizer
      EGU General Assembly 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recovery of stream runoff and chemistry after clear-cutting of small-scale forest catchment2019

    • Author(s)
      Tomoki Oda, Tomohiro Egusa, Naohiro Imamura, Nobuhito Ohte
    • Organizer
      Gordon Research Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Production rates of NH4+, NO2-, NO3- in forest srface soils- Comparison of patterns of spatial variation on a slope in three temperate forests2019

    • Author(s)
      黒岩恵、川合洸、田中直人、小田智基、諏訪裕一
    • Organizer
      日本生態学会第66回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Hydrological and biogeochemical responses and recovery processes after forest clear-cutting: The effects of small-scale forest management2018

    • Author(s)
      Tomoki Oda, Tomohiro Egusa, Naohiro Imamura, Nobuhito Ohte
    • Organizer
      American Geophysical Union
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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