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Ecological studies on a lake ecosystem with unbalanced food web structure

Research Project

Project/Area Number 26650164
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Ecology/Environment
Research InstitutionKyoto University

Principal Investigator

Nakano Shin-ichi  京都大学, 生態学研究センター, 教授 (50270723)

Co-Investigator(Kenkyū-buntansha) TANI Yukinori  静岡県立大学, 食品栄養科学部, 准教授 (10285190)
Research Collaborator TAKASU Hiroyuki  
KISHIMOTO Yui  
FUJINAGA Shohei  
SAI Kichi  
Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords食物網構造 / 佐鳴湖 / シネココッカス / 動物プランクトン / 微生物食物網 / 微生物ループ
Outline of Final Research Achievements

In Lake Sanaru, dominant phytoplankton in summer was cyanobacterial genus Synechococcus, and that in winter was dinoflagellate genus Katodinium which is an edible prey for meso-zooplankton. Density of zooplankton was usually low relative to that in previous studies, especially in winter. 53 to 175% of Synechococcus abundance was consumed by grazing, and flagellates were probably the most important grazers. Hence, it is likely that the food web dynamics in Lake Sanaru is driven by microbial food web between Synechococcus and flagellates. Herbivorous food chain between eukaryotic phytoplankton and meso-zooplankton is less important, even if there is the plenty of edible preys for meso-zooplankton.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (2 results)

All 2015

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] 湖沼・海洋沖帯の微生物ループにおける原生生物の生態学的役割2015

    • Author(s)
      中野伸一
    • Journal Title

      原生動物学雑誌

      Volume: 48 Pages: 21-30

    • NAID

      130005254779

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] アンバランスな食物網構造の湖沼生態系の解明:佐鳴湖のプランクトン食物網の不思議2015

    • Author(s)
      中野伸一、谷幸則、高巣裕之、岸本結、藤永承平
    • Organizer
      日本陸水学会
    • Place of Presentation
      北海道大学水産学部(函館)
    • Year and Date
      2015-09-26
    • Related Report
      2015 Annual Research Report

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Published: 2014-04-04   Modified: 2017-05-22  

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