La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Distribution patterns, range size and niche breadth of Austrian endemic plants
Auteurs :	Franz Essl, Auteur ; Markus Staudinger, Auteur ; Oliver Stoehr, Auteur ; Luise Schratt-Ehrendorfer, Auteur ; Wolfgang Rabitsch, Auteur ; Harald Niklfeld, Auteur
Type de document :	Article
Dans :	Biological Conservation (142(11) NOV 2009)
Article en page(s) :	2547-2558
Langues:	Anglais
Résumé :	Endemic species are not a uniform group in terms of range size, habitat preferences, and ecological plasticity. Based on a recent inventory of endemic vascular plant species in Austria, we analysed distribution patterns, altitudinal distribution and habitat preferences of endemic species and analysed the correlation of range size and niche breadth. The inventory includes 103 vascular plant taxa (species and subspecies) endemic to Austria. Grid cells (cell size ca. 35 km(2)) with highest taxon numbers (max. 25 taxa) are limited to the Northeastern Calcareous Alps, whereas highest numbers of acidophilous endemics occur in the easternmost high-mountain chains of the Central Alps. The majority of endemics (61 taxa: 59.2%) are found on calcareous bedrock, 6 taxa (5.8%) on intermediate substrates, and 29 (28.2%) on siliceous bedrock. The range size of endemic vascular plant taxa is strongly skewed towards very narrow distributions - 45 taxa are restricted to

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