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Examination on Processes and Mechanisms Involved in Carbon Dynamics in an Alpine Meadow on the Qinghai-Tibetan Plateau

Research Project

Project/Area Number 13575035
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Environmental dynamic analysis
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

TANG Yanhong  National Institute for Environmental Studies, Environmental Biology Division, Principle Researcher, 生物圏環境研究領域, 主任研究員 (40270590)

Co-Investigator(Kenkyū-buntansha) KOIZUMI Hiroshi  GIFU University, River Basin Research Center, Professor, 流域環境研究センター, 教授 (50303516)
MARIKO Shigeru  University of Tsukuba, Graduate School of Life and Environmental Sciences, Associate Professor, 生物科学研究科, 助教授 (10251018)
SEKIGAWA Seiko  Tamagawa University, Department of Sciences, Associate Professor, 理学部, 助教授 (40226642)
Project Period (FY) 2001 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥11,600,000 (Direct Cost: ¥11,600,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2001: ¥5,900,000 (Direct Cost: ¥5,900,000)
KeywordsAlpine plants / Carbon cycle / Global warming / Grassland / Photosynthesis / Photoinhibition / Respiration / UV-B / CO2 / 高山植物 / 蒸散 / CO2フラックス / 炭素蓄積 / 強光阻害
Research Abstract

The Qinghai-Tibetan Plateau is the highest plateau in the world. Covering mainly by alpine grasslands, the plateau plays an important role in the region's carbon budget. The plateau is characterized by high irradiance, low atmospheric pressure, and low temperature. To examine the carbon dynamics of grassland ecosystems on the plateau, we developed a new simulation model, the carbon dynamics model for alpine grasslands (CDMag). CDMag is composed of a gross photosynthesis (Ac) submodel including pbotoinhibition simulation, an ecosystem respiration (ER) submodel that considers both autotrophic and heterotrophic respiration, and an intercellular CO_2 partial pressure and canopy conductance submodel. A photoinhibition simulation is included to describe the gross production of alpine ecosystems in response to the high-irradiance environment A multilayered irradiance transfer scheme is adopted to estimate the irradiance on sunlit and shaded leaves within grassy canopies, and a coupled canopy … More conductance - net photosynthesis function is integrated into the Ac submodel. CDMag was used to simulate the carbon dynamics of the most extensively distributed alpine grassland, a Kobresia meadow ecosystem on the Qinghai-Tibetan Plateau. CDMag described well the diurnal and seasonal variation of net ecosystem exchange (NEE) and nighttime ER data obtained from 2001 to 2003 using the eddy-covariance method. The mean measured NEE was about 1.62 μmol m^<-2>s^<-1> for the measured periods of the 3 years ; the mean of the deviations between measured and simulated NEE was -0.16 to 0.33 μmol m^<-2> s^<-1>. Owing to photoinhibition, daily gross photosynthesis lost about 5.3%-5.6%. The losses were mainly contributed by the 7.5%-7.8% reduction in Ac of sunlit leaves of the upper canopy layer. In addition, the light-use efficiency of the alpine meadow had seasonal dynamics, with the highest values in the middle of the growing season. We have generalized CDMag for other alpine grasslands on the entire plateau.
In addition, high UV irradiation on the Qinghai-Tibetan plateau could also affect photosynthetic CO_2 uptake. We found that neither the photosynthetic CO_2 uptake rate nor the photosynthetic O_2 evolution rate changed significantly after a long period of artificially enhanced UV-B radiation. However, UV-B-absorbing compounds, detected by absorbance at 300 mm, seemed to increase after enhanced UV-B irradiation. Both biochemical components including chlorophyll and other pigments, and leaf thickness increased significantly under high UV-B radiation, suggesting that these alpine plants changed their leaf morphology and biochemistry to avoid a significant decrease in CO_2 uptake under UV-B elevation. Less

Report

(5 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (23 results)

All 2005 2004 Other

All Journal Article (14 results) Book (1 results) Publications (8 results)

  • [Journal Article] Strong temperature dependence and no moss photosynthesis in winter CO_2 flux for a Kobresia meadow on the Qinghai-Tibeta Plateau2005

    • Author(s)
      Kato T., Hirota M., Tang Y., Cui X., Li Y., Zhao X., Oikawa T.
    • Journal Title

      Soil Biology and Biochemistry (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau2005

    • Author(s)
      Gu S., Tang Y., Cui X., Kato T., Du M., Li Y., Zhao X.
    • Journal Title

      Agricultural and Forest Meteorology (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effects of temperature on the CO_2 exchange between the atmosphere and an alpine meadow on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Gu S., Tang Y., Cui X., Du M., Kato T., Li Y., Zhao X.
    • Journal Title

      Phyton (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Inclusion of photoinhibition in simulation of carbon dynamics of an alpine meadow on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Zhang Y., Tang Y.
    • Journal Title

      Journal of Geophysical Research-Biogeosciences (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Comparison of net CO2 exchange between 3 different vegetations on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Zhao L., Li Y., Zhao X., Xu S., Tang Y., Yu G., Gu S., Du m.
    • Journal Title

      Chinese Science Bulletin (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effects of temperature on the CO_2 exchange between the atmosphere and an alpine meadow on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Gu S., Tang Y., Cui X., Du M., Kato T., Li Y., Zhao X.
    • Journal Title

      Phyton (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Gu S., Tang Y., Cui X., Kato T., Du M., Li Y., Zhao X.
    • Journal Title

      Agricultural and Forest Meteorology (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Strong temperature dependence and no moss photosynthesis in winter CO_2 flux for a Kobresia meadow on the Qinghai-Tibetan plateau.2005

    • Author(s)
      Kato T., Hirota H., Tang Y., Cui X., Li Y., Zhao X.
    • Journal Title

      Soil Biology and Biochemistry (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Inclusion of photoinhibition in simulation of carbon dynamics of an alpine meadow on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Zhang Y., Tang Y.
    • Journal Title

      Journal of Geophysical Research - Biogeosciences (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Comparison of net CO2 exchange between 3 different vegetations on the Qinghai-Tibetan Plateau.2005

    • Author(s)
      Zhao L., Li Y., Zhao X., Xu S., Tang Y., Yu G., Gu S., Du M.
    • Journal Title

      Chinese Science Bulletin (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Strong temperature dependence and no moss photosynthesis in winter CO_2 flux for a Kobresia meadow on the Qinghai-Tibetan Plateau2005

    • Author(s)
      Kato T., Hirota M., Tang Y., Cui X., Li Y., Zhao X., Oikawa T.
    • Journal Title

      Soil Biology and Biochemistry (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Energy exchange between the atmosphere and a meadow ecosystem on the Qinghai-Tibetan Plateau2005

    • Author(s)
      Gu S., Tang Y., Cui X., Kato T., Du M., Li Y., Zhao X.
    • Journal Title

      Agricultureal and Forest Meteorology (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia2005

    • Author(s)
      Cui X., Wang Y., Niu H., Wu J., Wang S., Schnug E., Rogask J., Fleckenstein J., Tang Y.
    • Journal Title

      Ecological Research (in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Leaf orientation, incident sunlight and photosynthesis in the alpine species Suassurea superba and Gentiana straminea, Qinghai-Tibetan Plateau2004

    • Author(s)
      Cui X., Tang Y., Gu S., Shi S., Nishimura S., Zhao X.
    • Journal Title

      Arctic, Antarctic, and Alpine Research 36(in press)

      Pages: 219-228

    • Related Report
      2004 Annual Research Report
  • [Book] Science in China (Series D) (Chinese and English)2005

    • Author(s)
      Xu S., Zhao X., Fu Y., Zhao L., Li Y., Cao G., Gu S., Tang Y., Wang Q., Du M.
    • Publisher
      (in press)
    • Related Report
      2004 Annual Research Report
  • [Publications] Gu S., Tang Y., Du M., Kato T., Li Y., Cui X., Zhao X.: "Short-term term variation of CO_2 flux in relation to environmental controls in an alpine meadow on the Qinghai-Tibetan Plateau."Journal of Geophysical Research.. 108. ACL4,1-ACL4,9 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Shi S., Zhu W., Li H., Zhou D., Han F., Zhao X., Tang Y.: "Photosynthesis of Saussurea superba and Gentiana straminea is not reduced after long-term enhancement of UV-B radiation."Environmental and Experimental Botany. 51. 75-83 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kato T., Tang Y, Gu S., Cui X., Hirota M., Du M., Li Y., Zhao X., Oikawa T.: "Carbon dioxide exchange between the atmosphere and an alpine meadow ecosystem on the Qinghai-Tibetan Plateau, China."Agricultural and Forest Meteorology. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hirota M., Tang Y., Hu Q., Hirata S., Kato T., Mo M., Cao G., Mariko S.: "Methane emissions from different vegetation zones in a Qinghai-Tibetan Plateau wetland"Soil Biology & Biochemistry. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Cui X., Tang Y., Gu S., Shi S., Nishimura S., Zhao X.: "Leaf orientation, incident sunlight and photosynthesis in the alpine species Suassurea superba and Gentiana straminea, Qinghai-Tibetan Plateau."Arctic, Antarctic, and Alpine Research. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Xioayong Cui, Yanhong Tang, Song Gu, Seiichi Nishimura, Shengbo Shi, Xinquan Zhao: "Photosynthetic depression in relation to plant architecture in two alpine herbaceous species"Environmental and Experimental Botany. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 唐 艶鴻: "陸域の炭素収支における草原の役割"国立環境研究所ニュース. 21巻6号. 7-10 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 加藤知道, 古松, 杜明遠, 李英年, 趙新全, 唐艶鴻, 及川武久: "中国青海省高山草原におけるCO2フラックスと環境要因"筑波大学陸域環境研究センター報告. 第3号. 105-110 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2021-09-21  

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