Evaluation of the microbial alteration of nutritional value of organic matter in marine ecosystem

• Project/Area Number: 16K18737
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Aquatic bioproduction science
• Research Institution: Nagasaki University
• Principal Investigator: TAKASU Hiroyuki 長崎大学, 水産・環境科学総合研究科(環境), 助教 (00774803)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: アミノ酸 / 酵素分解性アミノ酸 / 有機物 / 海洋細菌 / 海洋 / 食物網 / デトリタス / 微生物

Outline of Final Research Achievements

Enzymatically hydrolyzable amino acids from marine bacteria were measured to evaluate the importance of bacteria as a bioavailable amino acids source for deposit feeders. The results indicated that progressive addition of bacteria-derived organic matter during degradation may positively or negatively affect the nutritional value of phytoplankton-derived organic matter, depending on the species of colonizing bacteria.

Research Products

• [Journal Article] Growth and mortality rates of prokaryotes in the hypolimnion of a deep freshwater lake (Lake Biwa, Japan) (2017)
  • Author(s): Hiroyuki Takasu, Shin-ichi Nakano
  • Journal Title: Inland Waters Volume: 7 Issue: 2 Pages: 164-170
  • DOI: 10.1080/20442041.2017.1298222
  • NAID: 120006988023
  • Peer Reviewed
• [Journal Article] 2011 年東北地方太平洋沖地震以降5年間の三陸沿岸大槌湾における栄養塩環境の変化 (2017)
  • Author(s): 福田秀樹, 楊 燕輝, 高巣裕之, 西部裕一郎, 立花愛子, 津田 敦, 永田 俊
  • Journal Title: 沿岸海洋研究 Volume: 54 Pages: 105-116
  • NAID: 130007797510
  • Peer Reviewed
• [Presentation] 琵琶湖の底にある、ちょっと変わった微生物ループ (2018)
  • Author(s): 中野伸一,早川和秀,程木義邦,岡崎友輔,Indranil Mukherjee,Shoji Thottatil,高巣裕之
  • Organizer: 日本生態学会
• [Presentation] 琵琶湖深水層における生物地球化学プロセス (2017)
  • Author(s): 高巣裕之、中野伸一
  • Organizer: 日本生態学会
  • Place of Presentation: 早稲田大学早稲田キャンパス(東京都新宿区)
  • Year and Date: 2017-03-15
• [Presentation] Microbial and biogeochemical processes in the hypolimnion of Lake Biwa (2016)
  • Author(s): Hiroyuki Takasu
  • Organizer: 日本陸水学会 第81回大会
  • Place of Presentation: 琉球大学(沖縄県那覇市)
  • Year and Date: 2016-11-05
• [Presentation] 三陸沖の水塊の起源と溶存態・懸濁態成分の分布特性 (2016)
  • Author(s): 福田秀樹、高巣裕之、楊燕輝、佐藤菜央美、永田俊
  • Organizer: 2016年度 日本海洋学会 秋季大会
  • Place of Presentation: 鹿児島大学(鹿児島県鹿児島市)
  • Year and Date: 2016-09-12