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2006 Fiscal Year Final Research Report Summary

Study on the resilience of a Mongolian grassland ecosystem from an experimental drought

Research Project

Project/Area Number 16405002
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Environmental impact assessment/Environmental policy
Research InstitutionTottori University (2006)
Tokyo Metropolitan University (2004-2005)

Principal Investigator

SHINODA Masato  Tottori University, Arid Land Research Center, Professor, 乾燥地研究センター, 教授 (30211957)

Co-Investigator(Kenkyū-buntansha) TSUNEKAWA Astushi  Tottori University, Arid Land Research Center, Professor, 乾燥地研究センター, 教授 (60227452)
TAMURA Kenji  University of Tsukuba, Graduate School of Life and Environmental Sciences, Associate Professor, 大学院応用生物化学系, 助教授 (70211373)
KIMURA Keiji  Hokkaido University, Graduate School of Information Science and Technology, Associate Professor, 大学院情報科学研究所, 助教授 (30294276)
NAKANO Tomoko  Tokyo Metropolitan University, Faculty of Urban Environmental Sciences, Research Associate, 大学院都市環境科学研究科, 助手 (70295468)
Project Period (FY) 2004 – 2006
Keywordsdrought / grassland ecosystem / atmosphere-land interaction / Mongolia / evapotranspiration / soil moisture / field experiment / resilience
Research Abstract

Recently, droughts have become widespread in the Northern Hemisphere continent, having a substantial effect on Mongolian grasslands in the quantitative (such as biomass) and qualitative (such as phenology) aspects. In order to investigate the ecosystem response to such a drought, an artificial drought experiment (DREX) with a rainout shelter was conducted at Bayan Unjuul (105.95°E, 47.04°N) in the typical steppe region during the growing summer rainy season of 2005. The present drought experiment is the first attempt in the Asian dryland. Results showed that the drought manipulation with a dry spell that occurs statistically once in half-one century resulted in drastic reductions in aboveground biomass (AGB), soil moisture, soil organic carbon, and total nitrogen, but not in a significant reduction in underground biomass (UGB). This drought impact was followed by a quick recovery in the AGB in the late summer of 2006, likely on the basis of the UGB having a biomass several times as much as the AGB. However, the drought-sensitive species, soil organic carbon, and total nitrogen have not yet revealed recovery as prior to the drought, suggesting the different time scales of responses for each ecosystem element.

  • Research Products

    (11 results)

All 2007 2006

All Journal Article (11 results)

  • [Journal Article] Phenology of Mongolian grasslands and moisture conditions2007

    • Author(s)
      Shinoda, M. et al.
    • Journal Title

      Journal of Meteorological Society of Japan (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 密閉式チャンバー法を用いた夜間の水蒸気フラックスの測定2007

    • Author(s)
      中野智子ほか
    • Journal Title

      農業気象 63・2(印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Morphological and physico-chemical characteristics of soils in a steppe region of the Kherlen River basin, Mongolia2007

    • Author(s)
      Asano, M. et al.
    • Journal Title

      Journal of Hydrology 333

      Pages: 100-108

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Δ ^<14>C variations of pedogenic carbonate in steppe soils under vegetation sequence in Mongolia2007

    • Author(s)
      Asano, M. et al.
    • Journal Title

      Nuclear Instruments & Method in Physics Research, Section B (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Phenology of Mongolian grasslands and moisture conditions2007

    • Author(s)
      Shinoda, M. et al.
    • Journal Title

      Journal of Meteorological Society of Japan (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurements of nighttime water vapor flux using a closed chamber technique2007

    • Author(s)
      Nakano, T. et al.
    • Journal Title

      Journal of Agricultural Meteorology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Δ ^<14>C variations of pedogenic carbonate in steppe soils under vegetation sequence in Mongolia2007

    • Author(s)
      Asano, M. et al.
    • Journal Title

      Nuclear Instruments & Method in Physics Research, Section B (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Drought Experiment of a Mongolian Grassland Ecosystem2006

    • Author(s)
      Shinoda, M et al.
    • Journal Title

      Proceedings of the 2006 American Geophysical Union Fall Meeting B51A

      Pages: 0296

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] モンゴル国北東部における草原土壌の特性および環境因子との相互作用について2006

    • Author(s)
      浅野 眞希
    • Journal Title

      ユーラシア研究 35

      Pages: 58-62

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Drought Experiment of a Mongolian Grassland Ecosystem2006

    • Author(s)
      Shinoda, M. et al.
    • Journal Title

      Proceedings of the 2006 American Geophysical Union Fall Meeting B51A-0296

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Interaction of soil properties and environmental factors in a steppe reasion of Norteastern Monglia Eurasian studies2006

    • Author(s)
      Asano, M.
    • Journal Title

      Eurasian Studies 35

      Pages: 58-62

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2008-05-27  

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