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Ecology from C-N balance

Research Project

Project/Area Number 04804053
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 生態学
Research InstitutionKYOTO UNIVERSITY (1993)
Ryukoku University (1992)

Principal Investigator

HIGASHI Masahiko  Kyoto University, Center for Ecological Research, 生態学研究センター, 助教授 (40183917)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1992: ¥800,000 (Direct Cost: ¥800,000)
KeywordsC-N balance / ecosystem / termite-symbionts fystem / trophic dynamics / development / terrestrial ecosystem / coral reef / mathematical model / 海洋生態系 / 湖沼生態系 / 珊瑚礁生態系 / 理論モデル / C-N balance / シロアリ / 共生 / 社会性 / 生物群集 / ニッチ / サンゴ
Research Abstract

Based on the "C-N balance" idea, I have obtained the following results.
A.Termite-symbionts system
1) I pointed out that termites have two options in C-N balancing, adding N on the input end or eliminating excessive C on the output end, and identified out of the interactions with symbionts those that contribute to the two types of C-N balancing methods.
2) Finding that termites' capability in resource utilization is mainly determined by their C-N balancing ability, I derived a theory that explains why separate type termites (the type of termites separating food habitat from their nest) are more prosperous than one piese type (those consuming as food the wood for their nest making), and why only separate type termites have true (sterile) worker caste.
B.Trophic dynamics of ecosystems
1) In aquatic systems, plants "dump" into the water as EOC (Extra cellular Organic Carbon) the excessive carbon produced in photosynthesis under poor nutrient conditions. I showed that this process can play as a determinant mechanism for the relative significance among grazing food chain, microbial loop, and detritus food chain.
2) I showed that the comparison in C-N balancing elucidates the difference in ecosystem structure among forest, grassland, and aquatic systems.
C.Ecosystem development
1) The "coevolutionary" mechanism between the producer and the decomposer can provide a driving force for ecosystem development.
2) I derived a theoretical model that explains the development of coral reef ecosystem in terms of C-N balancing.
These results suggest the broad applicability and the potential as a new paradigm of C-N balance model.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (37 results)

All Other

All Publications (37 results)

  • [Publications] Higashi,M.: "Trophic niches of species and trophic structure of ecosystems:complementary perspectives through food network unfolding" Journal of theoretical Biology. 154. 57-76 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yamamura,N.: "An evolutionary theory of conflict resolution between relatives:altruism,manipulation,compromise" Evolution. 46. 1236-1239 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M.: "Carbon-nitrogen balance and termite ecology" Proceedings of the Royal Society,London B. 249. 303-308 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M.: "What determines the animal group size:insider-outsider conflict and its resolution" The American Naturalist. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M.: "Network trophic dynamics:the mode of energy transfer and,and utilization in ecosystems" Ecological Modelling. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M.: "Network trophic dynamics:the tempo of energy movement and,and availability in ecosystems" Ecological Modelling. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M: "An extension of niche theory for complex interactions" In:Mutualism and Community Organization. 311-322 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M;Yamamura,N.;Nakajima,H.;Abe,T.: "Producer-decomposer matching in a simple model ecosystem:a network coevolutionary approach to ecosystem organization" In:Development of a Unified Perspective on the Organization of communities and ecosystems. 125-139 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Abe,T.;Higashi,M.: "Cellulose dynamics and termite ecology as key factors determing terrestrial community structure" In:Development of a Unified Perspective on the Organization of Communities and Ecosystems. 140-156 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 東正彦: "地球共生系とは何か" 平凡社, 164 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M., Burns, T.P., and Patten, B.C.: "Trophic niches of species and trophic structure of ecosystems : comlementary perspectives through food network unfolding" Journal of theoretical Biology. 154. 57-76 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yamamura, N.and Higashi, M.: "An evolutionary theory of conflict resolution between relatives : altruism, manipulation, compromise." Evolution. 46. 1236-1239 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M., Abe, T., and Burns, T.P.: "Carbon-nitrogen balance and termite ecology." Proceedings of the Royal Society London B. 249. 303-308 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M., Patten, B.C., and Burns, T.P.: "Network trophic dynamics : the mode of energy transfer and utilization in ecosystems." Ecological Modelling. 66. 1-42 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M., Burns, T.P., and Patten, B.C.: "Network trophic dynamics : the tempo of energy movement and availability in ecosystems." Ecological Modelling. 66. 43-64 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M.and Yamamura, N.: "What determines animal group size : insider-outsider conflict and its resolution." The American Naturalist. 142. 553-563 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Abe, T.and Higashi, M.: "Cellulose dynamics and termite ecology as key factors determining terrestrial community structure." Development of a Unified Perspective on the Organization of Communities and Ecosystems. 140-156 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M., Yamamura, N., Nakajima, H.and Abe, T.: "Producer-decomposer matching in a simple model ecosystem : a network coevolutionary approach to ecosystem organization." Development of a Unified Perspective on the Organization of Communities and Ecosystems. 125-139 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi, M.: "An extension of niche theory for comples interactions." Mutualism and Community Organization. 311-322 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Higashi,M.;Patten,B.C.;Burns,T.P.: "Network trophic dynamics:the mode of energy transfer and utilization in ecosystems." Ecological Modelling. 66. 1-42 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Higashi,M.;Burns,T.P.;Patten,B.C.: "Network trophic dynamics:the tempo of energy movement and availability" Ecological Modelling. 66. 43-64 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Higashi,M.;Yamamura,N.: "What determines animal group size:insider-outsider conflict and its resolution." The American Naturalist. 142. 553-563 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Abe,T.;Higashi,M.: "Cellulose dynamics and termite ecology as key factors determing teirestrial community structure." In:Development of a Unified Perspective on the Organization of communities and Ecosystems.140-156 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Higashi,M.;Yamamura,N.;Nakajima,H.;Abe,T.: "Producer-decomposer matching in a simple model ecosystem:a network coevolutionary approach to ecosystem organization" In:Development of a Unified Perspective on the Organization of communities and Ecosystems. 125-139 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Higashi,M.: "An extension of niche theory for complex interactions" In:Mutualism and Community Organization.

    • Related Report
      1993 Annual Research Report
  • [Publications] Higashi,M.: "Trophic niches of species and trophic structure of ecosystems:complementary perspectives through food network unfolding" Journal of theoretical Biology. 154. 57-76 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Yamamura,N.: "An evolutionary theory of conflict resolution between relatives:altruism,manipulation,compromise" Evolution. 46. 1236-1239 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "Carbon-nitrogen balance and termite ecology" Proceedings of the Royal Society,London B. 249. 303-308 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "What determines the animal group size:insider-outsider conflict and its resolution" The American Naturalist.

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "Network trophic dynamics:the mode of energy transfer and ,and utilization in ecosystems" Ecological Modelling.

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "Network trophic dynamics:the tempo of energy movement and,and availability in ecosystems" Ecological Modelling.

    • Related Report
      1992 Annual Research Report
  • [Publications] Abe,T.: "Cellulose dynamics and termite ecology as key factors determining terrestrial community structure" In:Development of a Unified Perspective on the Organization of Communities and Ecosystems(Oak Ridge National Laboratory).

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "Producer-decomposer matching in a simple model ecosystem:a network coevolutionary approach to ecosystem organization." In:Development of a Unified Perspective on the Organization of Communities and Ecosystems (Oak Ridge National Laboratory).

    • Related Report
      1992 Annual Research Report
  • [Publications] Patten,B.C.: "Indirect effects in complex ecology.II.The quantitative theory" In:Complex Ecology:The Part-Whole Relation in Ecosystems(Prentice Hall).

    • Related Report
      1992 Annual Research Report
  • [Publications] Patten,B.C.: "Network trophic dynamics:the alpha and omega of food web organization." In:Complex Ecology:The Part-Whole Relation in Ecosystems(Prentice Hall).

    • Related Report
      1992 Annual Research Report
  • [Publications] Higashi,M.: "An extension of niche theory for complex interactions" In:Mutualistic and the Organization of Natural Communities(Oxford University Press).

    • Related Report
      1992 Annual Research Report
  • [Publications] 東 正彦: "地球共生系とは何か" 平凡社, 164 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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