La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of habitat quality and hiking trails on the occurrence of Black Grouse (Tetrao tetrix L.) at the northern fringe of alpine distribution in Austria
Auteurs :	Markus Immitzer, Auteur ; Ursula Nopp-Mayr, Auteur ; Margit Zohmann, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (155(1) JAN 2014)
Article en page(s) :	173-181
Langues:	Anglais
Résumé :	The Black Grouse (Tetrao tetrix L.), listed in Annex 1 of the European Bird Directive, inhabits the vulnerable alpine treeline ecotone. Reacting sensitively to modifications of the environment, it can be regarded as an indicator species. To assess summer habitat use, we measured habitat parameters and recorded faeces (intestinal droppings) of Black Grouse on a mountain chain of the Northern Limestone Alps at the northern fringe of its distribution. In the area, the existing hiking trails are frequently used by hikers in summer. We modelled summer habitat use and included effects of hiking trails testing three different buffer radii around hiking trails (i.e., 50, 100 and 150 m); the buffer radius of 50 m significantly contributed to the final model of habitat use. Altitude, cover of grasses/herbs, canopy cover of woody plants

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