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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Plant species extinction debt in a temperate biodiversity hotspot: Community, species and functional traits approaches (2011)
Auteurs :	Julien Piqueray, Auteur ; Emmanuelle Bisteau, Auteur ; Sara Cristofoli, Auteur ; Rodolphe Palm, Auteur ; Peter Poschlod, Auteur ; Gregory Mahy, Auteur
Type de document :	Article
Dans :	Biological Conservation (144(5) MAY 2011)
Article en page(s) :	1619-1629
Langues:	Anglais
Résumé :	Destruction and fragmentation of (semi-) natural habitats are considered the main causes of biodiversity loss worldwide. Plant species may exhibit a slow response to fragmentation, resulting in the development of an extinction debt in fragmented plant communities. The detection of extinction debt is of primary importance in habitat conservation strategies. We applied two different approaches proposed in the literature to identify extinction debt in South-East Belgium calcareous grasslands. The first method compared species richness between stable and fragmented habitat patches. The second explored correlations between current species richness and current and past landscape configurations using multiple regression analyses. We subsequently examined results generated by both methods. In addition, we proposed techniques to identify species that are more likely to support extinction debt and associated functional traits. We estimated a respective extinction debt of approximately 28% and 35% of the total and specialist species richness. Similar results were obtained from both methods. We identified

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