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Population dynamics of Aster kantoensis based on a multi-layer lattice model

Research Project

Project/Area Number 11640631
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionThe University of Tokyo

Principal Investigator

SHIMADA Masakazu  University of Tokyo, Graduate School of Arts and Sciences, Associate Professor, 大学院・総合文化研究科, 助教授 (40178950)

Co-Investigator(Kenkyū-buntansha) WASHITANI Izumi  University of Tokyo, Graduate School of Agricultural and Life Sciences, Professor, 大学院・農学生命科学研究科, 教授 (40191738)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsAster kantoensis / Lattice model / Environmental variations / Disturbance effects / Asynchronization / Extinction risk assessment / Simulation analysis / Seed dispersal
Research Abstract

A multi-layer lattice model was constructed for assessing population dynamics and extinction risk of Aster kantoensis, corresponding to three levels : a whole meta-, regional, and local populations. Seed dispersal was considered at these three levels. For flood characteristics, we changed their scale, frequency, synchronization, and occurrence sites within a region. A local population processes were calculated with a projection matrix based on three stages : the small and large rosettes and the flowerings. Germination rate and establishment of seedling was assumed to decline depending on time after a local open patch emergence by a flood, because of other perennial plants invasion (coverage rate : β). We assumed that no seedlings cannot establish after a certain time (habitat deterioration time : dtime). Parameter values were estimated by field surveys and published records. Extinction risk was calculated as the extinction frequency after 100 years among 100 replicates x 10 series.
Simulation results showed that the present model has high descriptive ability and that the parameter values of β and dtime influence greatly on the extinction risk. For spatio-temporal characteristics of floods, the occurrence sites affected on the extinction risk largely and the fixation of the flood sites made the risk high eminently. Using the present model, we could detect important factors that influence largely the extinction risk of Aster kantoensis.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Shimada,M.& Ishihama F.: "Asynchronization of local population dynamics and persistence of a metapopulation : a lesson from an endangered herb, Aster kantoensis."Popul.Ecol.. 42. 63-72 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsumoto J.,Muraoka H.,& Washitani,I.: "Ecological mechanisms used by Aster kantoensis, an endangered species, to withstand high light and heat stresses of its gravelly floodplain habitat."Ann.Bot.. 86. 777-785 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsumoto J.,Muraoka H.,& Washitani,I.: "Whole plant carbon gain of an endangered herbaceous species, Aster kantoensis and the influence of shading by an alien grass Eragrostis curvula."Ann.Bot.. 86. 787-797 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shimada, M.and Ishihama F.: "Asynchronization of local population dynamics and persistence of a metapopulation : a lesson from an endangered herb, Aster kantoensis."Popul.Ecol.. 42. 63-72 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsumoto J., Muraoka H., and Washitani I.: "Ecophysiological mechanisms used by Aster kantoensis, an endangered species, to withstand high light and heat stresses of itstgravelly floodplain habitat."Ann.Bot.. 86. 777-785 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsumoto J., Muraoka H., and Washitani I.: "Whole plant carbon gain of an endangered herbaceous species Aster kantoensis and the influence of shading by an alien grass Eragrostis curvula in its gravelly floodplain habitat."Ann.Bot.. 86. 787-797 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shimada,M.& Ishihama F.: "Asynchronization of local population dynamics and persistence of a metapopulation : a lesson from an endangered herb, Aster kantoensis."Popul.Ecol.. 42. 63-72 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Matsumoto J.,Muraoka H.,& Wshitani,I.: "Ecological mechanisms used by Aster kantoensis, an endangered species, to withstand high light and heat stresses of its gravelly floodplain habitat."Ann.Bot.. 86. 777-785 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Matsumoto J.,Muraoka H.,& Wshitani,I.: "Whole plant carbon gain of an endangered herbaceous species, Aster kantoensis and the influence of shading by an alien grass Eragrostis curvula..."Ann.Bot.. 86. 787-797 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Shimada, M. & Ishihama F.: "Asynchronization of local population dynamics and persistence of a metapopulation : a lesson from an endangered herb, Aster kantoensis"Popul. Ecol.. 42(inpress). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 嶋田正和: "あの花はどこへ行ったの?-滅び行く植物の時空間動態。"生命論パラダイムの潮流(丸善). (印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Washitani I.: "Creeping 'fruitless falls': reproductive failure in heterostylous plants in fragmented landscapes""The Biology of Biodiversity" (M. Kato ed.) (Springer). 133-145 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Muraoka H., Tang Y., Terashima I., Koizumi H. and Washitani I.: "Contibutions of diffusional limitation, photoinhibition and photo-respiration to mid-day depression of photosynthesis in Arisaema..."Plant, Cell and Environment. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Araki S, and I. Washitani: "Seed dormancy/germination traits of seven Persicaria species and their implication in soil seed bank strategy"Ecological Research. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 鷲谷いづみ: "生物保全の生態学"共立出版. 182 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 鷲谷いづみ・飯島博: "よみがえれアサザ咲く水辺-霞ヶ浦からの挑戦"文一総合出版. 229 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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