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Sustainable Land Use Management Needed to Conserve the Dragon’s Blood Tree of Socotra Island, a Vulnerable Endemic Umbrella Species

Author

Listed:
  • Petr Maděra

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Daniel Volařík

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Zdeněk Patočka

    (Department of Forest Management and Applied Geoinformatics, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Hana Kalivodová

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Josef Divín

    (Department of Forest Management and Applied Geoinformatics, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Martin Rejžek

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Jan Vybíral

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic
    Lower Morava Biosphere Reserve, Zámecké náměstí 69, 691 44 Lednice, Czech Republic)

  • Samuel Lvončík

    (Department of Forest Botany, Dendrology and Geobiocoenology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • David Jeník

    (Department of Plant Biology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Pavel Hanáček

    (Department of Plant Biology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

  • Abdullateef Saad Amer

    (UNEP/GEF Project, Hadibo, Socotra, Republic of Yemen)

  • Petr Vahalík

    (Department of Forest Management and Applied Geoinformatics, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic)

Abstract

Unsustainable overgrazing is one of the most important threats to the endemic and endangered population of dragon’s blood tree ( Dracaena cinnabari ) on Socotra Island (Republic of Yemen). However, there is a lack of information about the exact population size and its conservation status. We estimated the population size of D. cinnabari using remote sensing data. The age structure was inferred using a relationship between crown projection area and the number of branch sections. The conservation importance of each sub-population was assessed using a specially developed index. Finally, the future population development (extinction time) was predicted using population matrices. The total population size estimated consists of 80,134 individuals with sub-populations varying from 14 to 32,196 individuals, with an extinction time ranging from 31 to 564 years. Community forestry controlled by a local certification system is suggested as a sustainable land management approach providing traditional and new benefits and enabling the reforestation of endemic tree species on Socotra Island.

Suggested Citation

  • Petr Maděra & Daniel Volařík & Zdeněk Patočka & Hana Kalivodová & Josef Divín & Martin Rejžek & Jan Vybíral & Samuel Lvončík & David Jeník & Pavel Hanáček & Abdullateef Saad Amer & Petr Vahalík, 2019. "Sustainable Land Use Management Needed to Conserve the Dragon’s Blood Tree of Socotra Island, a Vulnerable Endemic Umbrella Species," Sustainability, MDPI, vol. 11(13), pages 1-20, June.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:13:p:3557-:d:243700
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    References listed on IDEAS

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    1. Kappler, R.H. & Knight, K.S. & Root, K.V., 2019. "Evaluating the population viability of green ash trees (Fraxinus pennsylvanica) before and after the emerald ash borer beetle (Agrilus planipennis) invasion," Ecological Modelling, Elsevier, vol. 400(C), pages 53-59.
    2. Richard Gauld, 2000. "Maintaining Centralized Control in Community‐based Forestry: Policy Construction in the Philippines," Development and Change, International Institute of Social Studies, vol. 31(1), pages 229-254, January.
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