Estimation of detritus subsidy on terrestrial food webs

• Project/Area Number: 23657021
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Kyoto University
• Principal Investigator: TAYASU Ichiro 京都大学, 生態学研究センター, 准教授 (80353449)
• Project Period (FY): 2011 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 放射性炭素14 / 土壌生態系 / 腐食食物網 / デトリタス

Research Abstract

In a forest ecosystem, there is a food chain originated from detritus. The carbon originated from detritusis consumed by soil organisms and transferred to the aboveground ecosystem. Predators mix the materials originated from grazing and detritus food chains by predation. Carbon-14 concentration (Δ14C value) of predator indicates the “diet age” (carbon age) of the predator. It was concluded that relative contribution of the both pathways can be estimated by the Δ14C value of the predator.

Research Products

• [Journal Article] Are stored carbohydrates necessary for seed production in temperate deciduous trees? (2013)
  • Author(s): Ichie, T., Igarashi, S., Yoshida, S., Kenzo, T., Masaki, T. and Tayasu, I
  • Journal Title: Journal of Ecology Volume: 101 Issue: 2 Pages: 525-531
  • DOI: 10.1111/1365-2745.12038
  • Peer Reviewed
• [Journal Article] Contributions of detrital subsidies to aboveground spiders during secondary succession, revealed by radiocarbon and stable isotope signatures (2013)
  • Author(s): Takasni Haraguchi, Masao Uchida, Yasuyuki Shibata, Ichiro Tayasu
  • Journal Title: Oecologia Volume: 171 Issue: 4 Pages: 935-944
  • DOI: 10.1007/s00442-012-2446-1
  • Peer Reviewed
• [Journal Article] Changes in soil aggregate carbon dynamics under no-tillage with respect to earthworm biomass revealed by radiocarbon analysis (2013)
  • Author(s): Arai, M., Tayasu, I., Komatsuzaki, M., Uchida, M., Shibata, Y. and Kaneko, N.
  • Journal Title: Soil & Tillage Research Volume: 126 Pages: 42-49
  • Peer Reviewed
• [Journal Article] Changes in soil aggregate carbon dynamics under no-tillage with respect to earthworm biomass revealed by radiocarbon analysis. (2013)
  • Author(s): Arai, M., Tayasu, I., Komatsuzaki, M., Uchida, M., Shibata, Y. and Kaneko, N
  • Journal Title: Soil & Tillage Research Volume: 126 Pages: 42-49
  • DOI: 10.1016/j.still.2012.07.003
  • Peer Reviewed
• [Journal Article] Use of radiocarbon to estimate diet ages of earthworms at different climate regions. (2012)
  • Author(s): Hyodo, F., Uchida, T., Kaneko, N. and Tayasu, I.
  • Journal Title: Applied Soil Ecology Volume: 62 Pages: 178-183
  • Peer Reviewed
• [Presentation] アミノ酸窒素同位体比を用いた、陸域分解系における土壌動物の資源利用解析 (2013)
  • Author(s): 陀安一郎・長谷川尚志・由水千景・力石嘉人・小川奈々子・大河内直彦
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: グランシップ静岡
  • Year and Date: 2013-03-07
• [Presentation] 植生二次遷移過程における、クモ群集及びエサ供給量の変化と同位体食物網の関係 (2013)
  • Author(s): 原口岳・陀安一郎
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: グランシップ静岡
  • Year and Date: 2013-03-07
• [Presentation] アミノ酸窒素同位体比を用いた、陸域分解系における土壌動物の資源利用解析 (2013)
  • Author(s): 陀安一郎・長谷川尚志・由水千景・力石嘉人・小川奈々子・大河内直彦
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: グランシップ，静岡
• [Presentation] 植生二次遷移過程における、クモ群集及びエサ供給量の変化と同位体食物網の関係 (2013)
  • Author(s): 原口 岳・陀安一郎
  • Organizer: 日本生態学会第60回大会
  • Place of Presentation: グランシップ，静岡
• [Presentation] 植生二次遷移過程におけるクモ群集変化の特徴 (2012)
  • Author(s): 原口岳・陀安一郎
  • Organizer: 日本蜘蛛学会第44回大会
  • Place of Presentation: 山形市保健センター
  • Year and Date: 2012-08-25
• [Presentation] 森林伐採からの回復過程における低木層クモ群集の変化 (2012)
  • Author(s): 原口岳・陀安一郎
  • Organizer: 第123回日本森林学会大会
  • Place of Presentation: 宇都宮大学
  • Year and Date: 2012-03-27
• [Presentation] アミノ酸窒素同位体比による陸域腐食食物網解析の試み (2012)
  • Author(s): 長谷川尚志・力石嘉人・小川奈々子・大河内直彦・陀安一郎
  • Organizer: 日本生態学会第59回大会
  • Place of Presentation: 龍谷大学
  • Year and Date: 2012-03-20
• [Presentation] Food web analyses using C and N stable isotopes: spiders shift their prey from aboveground to belowground origin through secondary succession (2012)
  • Author(s): Haraguchi, T.F., Tayasu, I
  • Organizer: Joint Meeting of The 59th Annual Meeting of ESJ &The 5th EAFESInternational Congress
  • Place of Presentation: 龍谷大学
  • Year and Date: 2012-03-19
• [Presentation] ミミズの土壌改変が土壌の炭素貯留に及ぼす影響 (2012)
  • Author(s): 荒井見和・陀安一郎・小松崎将一・金子信博
  • Organizer: 機農業公開シンポジウム
  • Place of Presentation: 茨城大学
  • Year and Date: 2012-02-13
• [Presentation] ミミズの土壌改変が土壌の炭素貯留に及ぼす影響 (2012)
  • Author(s): 荒井見和・陀安一郎・小松崎将一・金子信博
  • Organizer: 有機農業公開シンポジウム
  • Place of Presentation: 茨城大学
• [Presentation] Food web analyses using C and N stable isotopes: spiders shift their prey from aboveground to belowground origin through secondary succession (2012)
  • Author(s): Haraguchi, T.F., Tayasu, I.
  • Organizer: Joint Meeting of The 59th Annual Meeting of ESJ &The 5th EAFES International Congress
  • Place of Presentation: Ryukoku University
• [Presentation] 安定同位体比分析によるヒメボタルLuciola parvula生息地における食物網構造の解明 (2011)
  • Author(s): 西村祐・前藤薫・陀安一郎
  • Organizer: 日本生態学会
  • Place of Presentation: 近畿地区会神戸大学
  • Year and Date: 2011-12-10
• [Presentation] 安定同位体比分析によるヒメボタルLuciola parvula生息地における食物網構造の解明 (2011)
  • Author(s): 西村祐・前藤薫・陀安一郎
  • Organizer: 日本生態学会近畿地区会
  • Place of Presentation: 神戸大学