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The Tragedy of Open Ecosystems

Author

Listed:
  • L. Doyen

    () (University of Bordeaux)

  • A. A. Cissé

    (University of Bordeaux
    UMSR Université de Guyane-CNRS-Ifremer)

  • N. Sanz

    (UMSR Université de Guyane-CNRS-Ifremer)

  • F. Blanchard

    (UMSR Université de Guyane-CNRS-Ifremer)

  • J.-C. Pereau

    (University of Bordeaux)

Abstract

Abstract This paper investigates the role played by cooperation for the sustainable harvesting of an ecosystem. To achieve this, a bio-economic model based on a multi-species dynamics with interspecific relationships and multi-agent catches is considered. A comparison between the non-cooperative and cooperative optimal strategies is carried out. Revisiting the Tragedy of Open Access and over-exploitation issues, it is first proved analytically how harvesting pressure is larger in the non-cooperative case for every species. Then it is examined to what extent gains from cooperation can also be derived for the state of the ecosystem. It turns out that cooperation clearly promotes the conservation of every species when the number of agents is high. When the number of agents remains limited, results are more complicated, especially if a species-by-species viewpoint is adopted. However, we identify two metrics involving the state of every species and accounting for their ecological interactions which exhibit gains from cooperation at the ecosystem scale in the general case. Numerical examples illustrate the mathematical findings.

Suggested Citation

  • L. Doyen & A. A. Cissé & N. Sanz & F. Blanchard & J.-C. Pereau, 2018. "The Tragedy of Open Ecosystems," Dynamic Games and Applications, Springer, vol. 8(1), pages 117-140, March.
  • Handle: RePEc:spr:dyngam:v:8:y:2018:i:1:d:10.1007_s13235-016-0205-3
    DOI: 10.1007/s13235-016-0205-3
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    References listed on IDEAS

    as
    1. Doyen, Luc & Péreau, Jean-Christophe, 2012. "Sustainable coalitions in the commons," Mathematical Social Sciences, Elsevier, vol. 63(1), pages 57-64.
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    More about this item

    Keywords

    Fish war; Ecosystem; Biodiversity; Bellman optimization; Markov-perfect Nash equilibrium; Intermediate complexity;

    JEL classification:

    • Q20 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - General
    • Q22 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Fishery

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