Gardening by net-spinning caddisflies: the effect of ecosystem engineers on microbial communities

• Project/Area Number: 26840146
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Kyoto University
• Principal Investigator: Okano Jun-ichi 京都大学, 生態学研究センター, 研究員 (20547327)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: caddisfly / building behaviour / トビケラ / 巣作り行動 / 微生物群集 / 多様性 / 生態系エンジニア / ニッチ構築 / 種内変異

Outline of Final Research Achievements

Many caddisfly larvae build cases using sand grains. In this study, I found among- and within-population variations in the material preference of the case-bearing larvae, and the both variations have high heritability. In addition, a few discrete peaks were found in the frequency distribution of the within-population variations, indicating the possibility of polymorphism. As a result of rearing experiment, it is suggested the possibility that the indirect interaction of cannibalism may be a key factor maintaining the polymorphism.

Research Products

• [Journal Article] The effect of human activities on benthic macroinvertebrate diversity in tributary lagoons surrounding Lake Biwa (2018)
  • Author(s): Jun-ichi Okano, Jun-ya Shibata, Yoichiro Sakai, Mana Yamaguchi, Mamiko Ohishi, Yukiko Goda, Shin-ichi Nakano, Noboru Okuda
  • Journal Title: Limnology Volume: 19 Issue: 2 Pages: 199-207
  • DOI: 10.1007/s10201-017-0530-2
  • NAID: 40021518593
  • Peer Reviewed
• [Journal Article] Effects of resource-dependent cannibalism on population size distribution and individual life history in a case-bearing caddisfly (2018)
  • Author(s): Jun-ichi Okano, Noboru Okuda
  • Journal Title: Plos one Volume: 13 Issue: 2 Pages: e0191925-e0191925
  • DOI: 10.1371/journal.pone.0191925
  • NAID: 120006466623
  • Peer Reviewed / Open Access
• [Journal Article] Differential responses of two ecologically similar case-bearing caddisflies species to a fish chemical cue: implication for a coexistence mechanism (2017)
  • Author(s): Jun-ichi Okano, Ichiro Tayasu, Shin-ichi Nakano, Noboru Okuda
  • Journal Title: Zoological Science Volume: 34 Issue: 6 Pages: 461-467
  • DOI: 10.2108/zs160207
  • NAID: 120006870848
  • Peer Reviewed
• [Journal Article] The effects of particle texture of sediment on the respiration of case-bearing caddisfly larvae (2016)
  • Author(s): Jun-ichi Okano, Osamu Sasaki and Harumasa Kano
  • Journal Title: Freshwater Science Volume: 35 Issue: 2 Pages: 611-618
  • DOI: 10.1086/685713
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 生態系エンジニアとしての水生昆虫トビケラ－環境改変力の地域変異 (2015)
  • Author(s): 岡野淳一
  • Journal Title: 昆虫と自然 Volume: 50 Pages: 36-39
  • NAID: 40020563849
  • Acknowledgement Compliant
• [Presentation] 動物の巣作りから眺める個体群・群集 (2016)
  • Author(s): 岡野淳一
  • Organizer: 個体群生態学会第32回大会
  • Place of Presentation: 札幌
  • Year and Date: 2016-11-03
• [Presentation] 生態系エンジニアによる環境・群集改変の地域変異 (2016)
  • Author(s): 岡野淳一、奥田昇
  • Organizer: 個体群生態学会第32回大会
  • Place of Presentation: 札幌
  • Year and Date: 2016-11-03
• [Presentation] サイズ依存共食いが及ぼす新規加入個体群への影響―捕食効・非捕食の相対的効果― (2016)
  • Author(s): 岡野淳一
  • Organizer: 日本生態学会 第63回大会
  • Place of Presentation: 仙台市
  • Year and Date: 2016-03-20
• [Presentation] トビケラの巣材選択における多型の維持メカニズム (2015)
  • Author(s): 岡野 淳一
  • Organizer: 日本生態学会第62回大会
  • Place of Presentation: 鹿児島
  • Year and Date: 2015-03-21
• [Presentation] ヒゲナガカワトビケラの造網による河川底質安定化の地域的な違い (2014)
  • Author(s): 岡野淳一・奥田昇
  • Organizer: 日本陸水学会第79回大会
  • Place of Presentation: 筑波
  • Year and Date: 2014-09-13
• [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: 筑波
  • Year and Date: 2014-09-12
• [Presentation] Tracking phosphorus sources and cycling in freshwater: stable isotope approach (2014)
  • Author(s): Abigail Cid, Uhram Song, Ichiro Tayasu, Jun-ichi Okano, Hiroyuki Togashi, Naoto F. Ishikawa, Aya Murakami, Takuya Hayashi, Tomoya Iwata, Ken-ichi Osaka, Shin-ichi Nakano, Noboru Okuda
  • Organizer: proceedings of the Japan Geoscience Union Meeting
  • Place of Presentation: 横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Remarks] 京都大学陸水生態学実習ＩＩ
  • URL: http://www.ecology.kyoto-u.ac.jp/~nokuda/research&education/education/limnolpracticeIIH26.htm