La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Historical costs and projected future scenarios for the management of invasive alien plants in protected areas in the Cape Floristic Region
Auteurs :	Brian W. van Wilgen, Auteur ; Jennifer M. Fill, Auteur ; Johan Baard, Auteur ; Chad Cheney, Auteur ; Aurelia T. Forsyth, Auteur ; Tineke Kraaij, Auteur
Type de document :	Article
Dans :	Biological Conservation (200 AUG 2016)
Article en page(s) :	168-177
Langues:	Anglais
Résumé :	Scarce funds for conservation need to be optimally used, yet there are few studies that record the costs and projected outcomes of major conservation efforts. Here we document the historical costs and extent of efforts to control invasive alien plants in the protected areas of the Cape Floristic Region of South Africa, a biodiversity hotspot of global importance. We also estimate the resources that would be needed to bring the problem under control within a reasonable timeframe, under a range of scenarios of funding, rate of spread, and management effort. Trees and shrubs in the genera Pinus, Acacia, Eucalyptus, Hakea, Leptospermum and Populus were estimated to cover >66% of 750 000 ha at various densities in 2014. Historical costs of attempts to control these invasions over the past 20 years amounted to ZAR 564 million (similar to

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