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Relationship between acorn masting and rodent population fluctuation

Research Project

Project/Area Number 19H03005
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 40010:Forest science-related
Research InstitutionForest Research and Management Organization

Principal Investigator

Shimada Takuya  国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (10353723)

Co-Investigator(Kenkyū-buntansha) 齊藤 隆  北海道大学, 北方生物圏フィールド科学センター, 名誉教授 (00183814)
佐藤 淳  福山大学, 生命工学部, 教授 (80399162)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2021: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords野ネズミ / 堅果豊凶 / DNAメタバーコーディング / 個体数変動 / 利用可能窒素量 / 糞中窒素量
Outline of Research at the Start

堅果の豊凶は森林生態系に広範な連鎖的影響を引き起こすが,その鍵となる堅果と野ネズミとの関係についてはいまだ十分には解明されていない.本研究では,人口統計学的解析と食性解析に基づく栄養学的アプローチによって生存と繁殖にかかわる個体群動態の過程を解明する.具体的には,① 二つの調査地で得た野ネズミ個体群の長期データを統計学的に詳細に解析し,堅果の豊凶が野ネズミ個体群の生存率,繁殖率に与える影響を解明する.② 野ネズミの糞をDNAメタバーコーディング法で分析し,繁殖にとって重要なタンパクソースと全食物中の堅果の利用割合とを解明し,野ネズミ個体群動態における堅果の相対的重要性を評価する.

Outline of Final Research Achievements

We analyzed the relationship between population fluctuations of the Japanese large wood mouse and acorn abundance in Hokkaido and Iwate, and found that the timing when the effects of acorn masting would emerge differed depending on whether their breeding season is before or after acorn falling. In addition, to elucidate the effect of acorn abundance on the growth of the wood mouse, we estimated the individual growth curve for Iwate population, and found that mice born in the next spring after acorn masting stopped growing earlier and reached sexual maturity at a lower body weight. We also conducted DNA metabarcoding using feces for three sympatric rodents in Hokkaido, and found that different responses to acorn masting among the three species were related with their different dependence on acorns as a food resource.

Academic Significance and Societal Importance of the Research Achievements

堅果の豊凶は森林生態系から人獣共通感染症の流行におよぶ広範な影響を引き起こすが、その鍵となるのは野ネズミとの関係である。そのため、堅果豊凶に対する野ネズミ個体群の反応を解明することは、森林への影響や人獣共通感染症のリスクを管理する上で重要な課題である。本研究によって、堅果豊凶に対する野ネズミ種間および個体群間での反応の違いが明らかになり、その違いをもたらすメカニズムの一端(堅果依存度の違い、繁殖期のタイミング、成長パターンの違いなど)が解明された。この成果は、堅果豊凶に対する野ネズミの個体数変動を予測する上で重要な貢献となる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019 Other

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (4 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Soil fauna community assembled in the abandoned nests of Japanese wood mice2021

    • Author(s)
      FUJII Saori、SHIMADA Takuya、NAKAMURA Shoko、MAKINO Shun?ichi、OKABE Kimiko
    • Journal Title

      Journal of the Acarological Society of Japan

      Volume: 30 Issue: 1 Pages: 1-4

    • DOI

      10.2300/acari.30.1

    • NAID

      130008048869

    • ISSN
      0918-1067, 1880-2273
    • Year and Date
      2021-05-25
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preliminary life history observations of the pseudoscorpion Megachernes ryugadensis (Pseudoscorpiones: Chernetidae) phoretic on wood mice in Japan2020

    • Author(s)
      Okabe K, Shimada T, Makino S.
    • Journal Title

      Journal of Arachnology

      Volume: 48 Issue: 2 Pages: 155-160

    • DOI

      10.1636/0161-8202-48.2.155

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Decadal changes in masting behaviour of oak trees with rising temperatur2020

    • Author(s)
      Mitsue Shibata, Takashi Masaki, Tsutomu Yagihashi, Takuya Shimada, Takashi Saitoh
    • Journal Title

      Journal of Ecology

      Volume: 108 Issue: 3 Pages: 1088-1100

    • DOI

      10.1111/1365-2745.13337

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Population responses of rodents to the mast seeding of dwarf bamboo <i>Sasamorpha borealis</i> over the Chubu region of Japan2019

    • Author(s)
      島田 卓哉、星野 大介、岡本 透、齋藤 智之、野口 和幸、酒井 武
    • Journal Title

      Bulletin of the Forestry and Forest Products Research Institute

      Volume: 18 Issue: 4 Pages: 381-387

    • DOI

      10.20756/ffpri.18.4_381

    • NAID

      130007795319

    • ISSN
      0916-4405, 2189-9363
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cold temperature improves tannin tolerance in a granivorous rodent2019

    • Author(s)
      Windley Hannah R.、Shimada Takuya
    • Journal Title

      Journal of Animal Ecology

      Volume: 89 Issue: 2 Pages: 471-481

    • DOI

      10.1111/1365-2656.13119

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Herbivore offense: 植物二次代謝物質,とくにタンニンに対する野ネズミの対抗手段2021

    • Author(s)
      島田卓哉
    • Organizer
      2021年日本哺乳類学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Indirect effects of pulsed resources on individual growth and sexual maturity of the Japanese wood mouse2020

    • Author(s)
      島田卓哉、伊東宏樹、齊藤隆、飯島勇人
    • Organizer
      日本生態学会67回大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 野ネズミ3種の共存メカニズムの解明:DNAメタバーコーディング法による食性分析の視点2020

    • Author(s)
      渡邊佳奈、齊藤隆、佐藤淳、島田卓哉
    • Organizer
      日本生態学会67回大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 北海道に生息する3種の野ネズミの共存メカニズムの解明2019

    • Author(s)
      渡邊佳奈、齊藤隆、佐藤淳、島田卓哉
    • Organizer
      日本哺乳類学会2019年度大会
    • Related Report
      2019 Annual Research Report
  • [Book] 野ネズミとドングリ2022

    • Author(s)
      島田 卓哉
    • Total Pages
      208
    • Publisher
      東京大学出版会
    • ISBN
      9784130639521
    • Related Report
      2021 Annual Research Report
  • [Remarks] ドングリを食べるなら気温は低いほうがいい

    • URL

      https://www.ffpri.affrc.go.jp/research/saizensen/2019/20191107-02.html

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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