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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The implications of snow-based recreation for small mammals in the subnivean space in south-east Australia
Auteurs :	Glenn M. Sanecki, Auteur ; Ken Green, Auteur ; Helen Wood, Auteur ; David Lindenmayer, Auteur
Type de document :	Article
Dans :	Biological Conservation (129(4) MAY 2006)
Article en page(s) :	511-518
Langues:	Anglais
Résumé :	The increasing popularity of snow-based recreation activities and the development of ski resorts and associated infrastructure have the potential to affect adversely small mammal fauna that over-winter in the subnivean space. We investigated the effects of human activities on the maintenance of the subnivean space, which is critical to the over-winter survival of small terrestrial mammals in Kosciuszko National Park, south-eastern Australia. The creation of ski pistes, surface ski lifts and over-snow routes involves compression of the snowpack and resulted in small or absent subnivean spaces (average 1.2 cm) and high snow cover densities (generally over 0.5 g cm(-3) and 0.35 g cm(-3) respectively). By contrast, the subnivean spaces associated with unmodified snow cover averaged 8-20 cm depending on vegetation type. The density of unmodified snowpack was less than 0.35 g cm(-3) in June but increased throughout the season to levels comparable to those of compressed snow. When the snowpack was experimentally compressed at 22 sites, destroying the subnivean space, detections of two small mammal species (Rattus fuscipes and Antechinus swainsonii) significantly (p

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