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Improving effectiveness of alien plant clearing on Reunion Island through partnership

Amy Elise, Bracco Isabelle, Fenouillas Pauline, Gosset Mélodie, Ingrassia Florent, Lavergne Christophe, Rouget Mathieu, Lequette Benoit, Picot Frédéric, Poungavanon Nila, Notter Jean-Cyrille, Pausé Jean-Marie, Payet Nicolas, Strasberg Dominique, Payet Guillaume, Triolo Julien, Thomas Hermann, Turquet Vincent. 2019. Improving effectiveness of alien plant clearing on Reunion Island through partnership. In : Book of abstracts posters of the third international conference on Island ecology, evolution and conservation. Flores Olivier (ed.), Ah-Peng Claudine (ed.), Wilding Nicholas (ed.). Université de la Réunion. Saint-Denis : Université de la Réunion, Résumé, p. 56. International conference on Island ecology, evolution and conservation. 3, Saint-Denis, Réunion, 8 July 2019/13 July 2019.

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Abstract : Biological invasions threaten biodiversity worldwide, especially on tropical islands such as Reunion Island. Here we present the results of a collaborative effort to map biodiversity priorities and to prioritise alien plant clearing. We first combined all existing data on habitats, threatened and endemic species and the distribution of alien plant species. Using expert-knowledge where necessary, we provide the first map of invasion level for the whole island. We developed a decision-making process using Zonation, a conservation-planning tool, to identify biodiversity conservation priorities. Conservation priority areas were selected to maximise biodiversity levels in areas lightly invaded. We then included criteria to identify priority areas for alien plant clearing based on clearing costs, accessibility and history of previous clearing programmes. Almost 40% of the remaining natural habitats on Reunion Island are moderately to heavily invaded. We identify 58,500 ha as conservation priority areas of which 30%are considered to be not invaded at all. We discuss how this will impact future alien plant clearing programmes and propose the basis for an integrated clearing and restoration plan for Reunion Island.

Auteurs et affiliations

  • Amy Elise, Parc national de la Réunion (REU)
  • Bracco Isabelle, DAF (Réunion) (REU)
  • Fenouillas Pauline, CIRAD-BIOS-UMR PVBMT (REU)
  • Gosset Mélodie, DEAL (REU)
  • Ingrassia Florent, ONF (REU)
  • Lavergne Christophe, CBN-CPIE Mascarin (REU)
  • Rouget Mathieu, CIRAD-BIOS-UMR PVBMT (REU)
  • Lequette Benoit, Parc national de la Réunion (REU)
  • Picot Frédéric, CBN-CPIE Mascarin (REU)
  • Poungavanon Nila, GCEIP (REU)
  • Notter Jean-Cyrille, Parc national de la Réunion (REU)
  • Pausé Jean-Marie, Parc national de la Réunion (REU)
  • Payet Nicolas, Université de la Réunion (REU)
  • Strasberg Dominique, Université de la Réunion (REU)
  • Payet Guillaume, Université de la Réunion (REU)
  • Triolo Julien, ONF (REU)
  • Thomas Hermann, Parc national de la Réunion (REU)
  • Turquet Vincent

Source : Cirad-Agritrop (https://agritrop.cirad.fr/594118/)

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