Microbial food sources of aquatic insects analyzed by using compund-specific stable isotopes

• Project/Area Number: 25891013
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Ecology/Environment
• Research Institution: National Research Institute of Brewing (2014); Kyoto University (2013)
• Principal Investigator: AKAMATSU Fumikazu 独立行政法人酒類総合研究所, 品質・安全性研究部門, 研究員 (50468146)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 水生昆虫 / 微生物 / 安定同位体

Outline of Final Research Achievements

Microbial food sources of aquatic insects were estimated by using compound-specific stable isotope analysis to reveal microbial driven material cycles in river ecosystems. The origin of microbes assimilated by aquatic insects that varied depending on the feeding function. The compound-specific carbon stable isotope analysis showed that grazers used autochthonous organic materials derived from biofilm on cobbles, while filter feeders assimilated allochthonous organic materials in the particulate organic matter via the use of microorganisms. These results suggest that riverine food webs may take in allochthonous organic matters through use of the microbial food sources by aquatic consumers.

Research Products

• [Presentation] 乾燥処理の違いによる脂肪酸の炭素安定同位体比への影響 (2014)
  • Author(s): 赤松史一、鈴木彌生子、加藤義和、由水千景、陀安一郎
  • Organizer: 日本陸水学会甲信越支部会第40回
  • Place of Presentation: 長野県松川村
  • Year and Date: 2014-11-29 – 2014-11-30
• [Presentation] 脂肪酸分析によるヒゲナガカワトビケラの微生物利用評価 (2014)
  • Author(s): 赤松史一、岡野淳一、藤永承平、加藤義和、由水千景、中野伸一、陀安一郎
  • Organizer: 日本陸水学会第79回大会
  • Place of Presentation: 茨城県つくば市
  • Year and Date: 2014-09-10 – 2014-09-13