Development of portable carbon isotope observation system to evaluate carbon cycle in ecosystems

2013 Fiscal Year Final Research Report

• Project/Area Number: 22681002
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Forestry and Forest Products Research Institute
• Principal Investigator: TAKANASHI Satoru 独立行政法人森林総合研究所, 気象環境研究領域, 主任研究員 (90423011)
• Project Period (FY): 2010-04-01 – 2014-03-31
• Keywords: 物質循環 / 生態系モデル / 炭素貯留 / 同位体 / 光合成 / 呼吸 / レーザー分光 / 二酸化炭素

Research Abstract

Fluxes and concentrations of carbon dioxide isotope compositions provide information about not only carbon balance but also ecosystem physiological processes and their response to environmental variation. For continuous measurement of carbon dioxide isotopic composition over various time-scales using a tunable diode laser spectrometer (TDLS), the performance of a TDLS was tested. Using this TDLS, we developed portable carbon isotope observation system, and continuously observed carbon isotopic composition of carbon dioxide in a field. The carbon isotopic composition of the atmospheric carbon dioxide was fluctuated according the changes of carbon dioxide concentration and fluctuations of the carbon isotope signal from soil respired carbon dioxide was not detected, although Keeling plots to estimate isotope signal from the soil were very sensitive and the results were very scattered especially in winter.

Research Products

• [Presentation] アカマツの樹体内炭素移動と光合成・呼吸速度 (2014)
  • Author(s): 高梨 聡, 檀浦 正子, 小南 裕志, 中野 隆志, 安間 光, 中井 裕一郎
  • Organizer: 日本生態学会第61回全国大会
  • Place of Presentation: 広島国際会議場(広島県広島市)
  • Year and Date: 2014-03-15
• [Presentation] 光合成で獲得した炭素はいつ根呼吸として消費されるのか?<13>^C パルスラベリング同位体法を用いての解明 (2013)
  • Author(s): 牧田 直樹, 小杉 緑子, 高梨 聡
  • Organizer: 第124回日本森林学会大会
  • Place of Presentation: 岩手大学(岩手県盛岡市)
  • Year and Date: 2013-03-27
• [Presentation] アカマツに吸収された二酸化炭素はいつ, どれだけ呼吸として放出されるのか? (2013)
  • Author(s): 高梨 聡, 檀浦 正子, 小南 裕志, 中野 隆志, 安間 光, 中井 裕一郎
  • Organizer: 日本生態学会第60回全国大会
  • Place of Presentation: 静岡県コンベンションアーツセンター(静岡県静岡市)
  • Year and Date: 2013-03-07
• [Presentation] レーザー分光同位体計測装置を使用した森林内二酸化炭素および水蒸気同位体比のリアルタイム計測 (2012)
  • Author(s): 和田 龍一, 竹村 匡弘, 大内麻衣, 中山 智喜, 松見 豊, 高梨 聡, 中井 裕一郎, 北村 兼三, 栗田直幸, 藤吉 康志, 村本 健一郎, 井上 元, 児玉 直美, 中野 隆志, 檜山 哲哉
  • Organizer: Japan GeoScience Union Meeting 2012
  • Place of Presentation: 幕張メッセ(千葉県千葉市)
  • Year and Date: 2012-05-23
• [Presentation] Automated continuous measurements of <13>^CO_2 concentration and flux from soils in a cool-temperate coniferous forest using a tunable diode laser spectrometer (2012)
  • Author(s): Takanashi, S., Nakai, Y., Kitamura, K., Kominami, Y, Dannoura, M., Takahashi, K., Nakano, T
  • Organizer: The 5th EAFES International Congress
  • Place of Presentation: 龍谷大学瀬田キャンパス(滋賀県大津市)
  • Year and Date: 2012-03-20
• [Presentation] Temporal and spatial distribution of CO_2 and H_2O isotopic compositions in a red-pine forest (2010)
  • Author(s): TAKANASHI, S., NAKAI, Y., KITAMURA, K., WADA, R., TAKEMURA, M., OUCHI, M., NAKAYAMA, T., MATSUMI, Y., KURITA, N., FUJIYOSHI, Y., MURAMOTO, K., HIYAMA, T., INOUE, G. , KODAMA, N. , NAKANO T
  • Organizer: Symposium on the use of new techniques to understand gas exchange and carbon dynamics in the forest ecosystem
  • Place of Presentation: 京都大学(京都府京都市)
  • Year and Date: 2010-11-01
• [Presentation] Real-time, continuous measurements of CO_2 and H_2O isotopic compositions in the forest site at the foot of Mt (2010)
  • Author(s): WADA, R., TAKEMURA, M., OUCHI, M., NAKAYAMA, T., MATSUMI, Y., TAKANASHI, S., NAKAI, Y., KITAMURA, K., KURITA, N., FUJIYOSHI, Y., MURAMOTO, K., HIYAMA, T., INOUE, G., KODAMA, N., NAKANO, T
  • Organizer: Fuji using laser absorption spectrometers, International Symposium on Environmental Monitoring in East Asia
  • Place of Presentation: 金沢大学(石川県金沢市)
  • Year and Date: 2010-09-28