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Effects of artificial disturbance of river on the biodiversity of the river forest

Research Project

Project/Area Number 12460064
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 林学
Research InstitutionTohoku Univ.

Principal Investigator

SEIWA Kenji  Graduate School of Agricultural Science, Tohoku Univ., Professor, 大学院・農学研究科, 教授 (40261474)

Co-Investigator(Kenkyū-buntansha) KOIKE Takayoshi  Graduate School of Agriculture, Hokkaido Univ., Professor, 北方生物圏フィールド科学センター, 教授 (10270919)
KIKUZAWA Kihachiro  Graduate School of Agriculture, Kyoto Univ., Professor, 大学院・農学研究科, 教授 (50271599)
SUYAMA Yoshihisa  Graduate School of Agri. Scie., Tohoku Univ., Associate Professor, 大学院・農学研究科, 助教授 (60282315)
YANAI Seiji  Dept Enviro design, Hokkaido Institute of Technology, Professor, 環境デザイン学科, 教授 (20337009)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥14,500,000 (Direct Cost: ¥14,500,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2000: ¥10,500,000 (Direct Cost: ¥10,500,000)
KeywordsRiver side forest / Willows / Mating systems / Reproductive efforts / Compensation Mechanisms / Food chain / Flowering phenology / dioecy / オノエヤナギ / イヌコリヤナギ / 繁殖構造 / 安定同位体 / AFLP / 性比 / 繁殖投資量 / 資源獲得効率 / 繁殖成功度 / マイクロサテライト / 光合成特性 / デトリタス
Research Abstract

To evaluate the mechanisms of bio-diversity of riverside forests, we investigated the reproductive strategies and mating systems of several dominant tree species in several well-preserved riverside forests in temperate region of Japan. In the dioecious tree species, Salix sp., we revealed the relative importance of sexual and asexal reproduction in relation to stand ages. In Salix sp., female invest much more resource to reproduction, but they have several superior physiological, morphological, and phenological mechanisms to compensate the reproductive cost. We also revealed that a riverside species, Jugalns ailanthifolia, is a heterodichogamous species, which have two type of flowering phenolgies. Both types invest equally to each of male and female function. Male reproductive success was also almost identical to that of females.
We revealed the food chain from litter fall in mountaneous river side forest to fish in sea by using stable isotope. This study provide the evidences of importance of the preservation of natural riverside forests to maintain the bio-diversity.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Kobayashi, Y., Kikuzawa, K.: "A single theory explains two empirical laws applicable to plant populations"Journal of Theoretical Biology. 205. 253-260 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichie, T., Kitahashi, Y., Matsuki, S., Maruyama, Y., Koike, T.: "The use of a portable non-destractive type nitrogen meter for leaves of woody plants in field studies"Photosynthetica. 40. 289-292 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nagata, M., Omori, H., Yanai, S.: "Restoration of spawning and rearing habitats formasu salmon, Oncohynchus masou in a channellzed stream"Fisheries Science. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Seiwa, K., Kadowaki, T., Akasaka, S, Kikuzawa, K: "Shoot life-span in relation to successional status for isdeciduous broad-leaved tree species"Third International Workshop on Functional-Structural Tree and Stand Models. 38 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Veno, N., Seiwa, K.: "Gender-specific Shoot structure and functions in relation to habitat conditions in a dioecious tree, Salix sachalinensis"Journal of Forest Research. 8. 9-16 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kimura, M., Seiwa, K., Suyoma, Y., Ueno, N.: "Flowering system of heterodichogamaous Juglans aibnthifolia"Plant Species Biology. (in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 菊沢喜八郎, 甲山隆司: "森の自然史<複雑系の生態学>"北海道大学図書刊行会. 236 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kobayashi, Y., Kikuzawa, K.: "A single theory explains two empirical laws applicable to plant populations"Journal of Theoretical Biology. 205. 253-260 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ichie, T., Kitahashi, Y., Matsuki, S., Maruyama, Y., Koike, T.: "The use of a portable non-destractivetype nitrogen meter for leaves of woody plants in field studies"Photosynthetica. 40. 289-292 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Nagata, M., Omori, H., Yanai, S.: "Restoration of spawing and rearing habitats for masou salmon, Oncohynchus masou in a channelized stream"Fisheries Science. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Seiwa, K., Kadowaki, T., Akasaka, S., Kikuzawa, K.: "Shoot life-span in relation to successional status for 15 deciduous broad-leaved tree species"Third International Workshop on Functional-Structural Tree and Stand Models. 38 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ueno, N., Seiwa, K.: "Gender-specific shoot structure and functions in relation to habitat conditions in a dioecious tree, Salix sachalinensis"Journal of Forest Research. 8. 9-16 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kimura, M., Seiwa, K., Suyama, Y., Ueno, N.: "Flowering system of heterodichogamons Juglans ailanthifolia"Plant Species Biology (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kikuzawa, K., Kohyama, T.: "Natural history of spring <The ecology of the comple system>"Hokkaido University Press. 236 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Ueno, N., Seiwa, K.: "Gender-specific shoot structure and functions is relation to habitat conditions in a dioecious tree, Salix sachalinensis"Journal of Forest Research. 8. 9-16 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 木村恵(研究協力者): "オニグルミ自然林での3年間にわたる開花特性"川渡農場報告. 17. 43-52 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 戸澤宗孝(研究協力者): "イヌコリヤナギにおける雄雌間の繁殖投資量の違いと繁殖コストの補償機構"川渡農場報告. 17. 53-60 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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