La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	How much compensation do we need? Replacement ratio estimates for Swiss dry grassland biotopes
Auteurs :	Thomas Dalang, Auteur ; Anna M. Hersperger, Auteur
Type de document :	Article
Dans :	Biological Conservation (143(8) AUG 2010)
Article en page(s) :	1876-1884
Langues:	Anglais
Résumé :	Development pressure on reserve networks in densely populated countries may lead to the decision to allow for replacement compensation. Replacement ratios used for specifying replacement compensation are usually based on expert judgment. In contrast, we propose a method to estimate replacement ratios based on the set covering framework. The method is applied to presence-absence data of vascular plants of the dry grassland inventory of Switzerland. For the replacement of 60% of a patch's high conservation value species by the same vegetation type ("in-kind" compensation), the estimated replacement ratios are

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