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Optimal investment for enhancing social concern about biodiversity conservation: A dynamic approach

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  • Lee, Joung Hun
  • Iwasa, Yoh

Abstract

To maintain biodiversity conservation areas, we need to invest in activities, such as monitoring the condition of the ecosystem, preventing illegal exploitation, and removing harmful alien species. These require a constant supply of resources, the level of which is determined by the concern of the society about biodiversity conservation. In this paper, we study the optimal fraction of the resources to invest in activities for enhancing the social concern y(t) by environmental education, museum displays, publications, and media exposure. We search for the strategy that maximizes the time-integral of the quality of the conservation area x(t) with temporal discounting. Analyses based on dynamic programming and Pontryagin’s maximum principle show that the optimal control consists of two phases: (1) in the first phase, the social concern level approaches to the final optimal value y∗, (2) in the second phase, resources are allocated to both activities, and the social concern level is kept constant y(t)=y∗. If the social concern starts from a low initial level, the optimal path includes a period in which the quality of the conservation area declines temporarily, because all the resources are invested to enhance the social concern. When the support rate increases with the quality of the conservation area itself x(t) as well as with the level of social concern y(t), both variables may increase simultaneously in the second phase. We discuss the implication of the results to good management of biodiversity conservation areas.

Suggested Citation

  • Lee, Joung Hun & Iwasa, Yoh, 2012. "Optimal investment for enhancing social concern about biodiversity conservation: A dynamic approach," Theoretical Population Biology, Elsevier, vol. 82(3), pages 177-186.
  • Handle: RePEc:eee:thpobi:v:82:y:2012:i:3:p:177-186
    DOI: 10.1016/j.tpb.2012.06.008
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    References listed on IDEAS

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    6. Macmillan, Douglas C. & Philip, Lorna & Hanley, Nick & Alvarez-Farizo, Begona, 2002. "Valuing the non-market benefits of wild goose conservation: a comparison of interview and group based approaches," Ecological Economics, Elsevier, vol. 43(1), pages 49-59, November.
    7. M. Kassas, 2002. "Environmental Education: Biodiversity," Environment Systems and Decisions, Springer, vol. 22(4), pages 345-351, December.
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    Cited by:

    1. Lee, Joung Hun & Kakinuma, Kaoru & Okuro, Toshiya & Iwasa, Yoh, 2015. "Coupled social and ecological dynamics of herders in Mongolian rangelands," Ecological Economics, Elsevier, vol. 114(C), pages 208-217.

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