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Biotope - Typologie Européenne EUNIS
F2.1 - Niveau 3 : Fourrés subarctiques et alpins à Saules nains
Description
Salix scrub composed of species that rarely exceed 1.5 m in height. Dwarf willow scrub is well developed in boreal and arctic mountains and in subarctic lowlands. In mountains of the nemoral and warm-temperate zones, stands of dwarf willow scrub are of much smaller extent and are charactistic of late-lying snow patches. They occur in the Alps, Pyrenees, Carpathians and Caucasus, and very locally to the south in the Paeonian mountains, Sierra Nevada, Cordillera Central, Monti Sibillini and Abruzzi. They occur locally in the Scottish Highlands and in the Sudeten.
Taxons (Liens actifs si espèces présentes)
F2.11 - Niveau 4 : Fourrés des combes à neige acidoclines boréo-alpines à Salix herbacea
Description
Acidophile or acidocline snow-patch and snowbed communities of the boreal and arcto-alpine mountains, dominated by dwarf willows. Creeping species dominate, adapted to the short growth season in areas covered by snow for up to eight to ten months. Typical species: Salix herbacea, Carex firma, Dryas octopetala, Salix retusa, Aster alpinus and Carex sempervirens. Endemic species are also often found.
Taxons (Liens actifs si espèces présentes)
Aster alpinus L., 1753 ( Esp. caract. )
Carex firma Mygind ex Host, 1797 ( Esp. caract. )
Carex sempervirens Vill., 1787 ( Esp. caract. )
Dryas octopetala L., 1753 ( Esp. caract. )
Salix herbacea L., 1753 ( Esp. caract. )
Salix retusa L., 1759 ( Esp. caract. )
Carex firma Mygind ex Host, 1797 ( Esp. caract. )
Carex sempervirens Vill., 1787 ( Esp. caract. )
Dryas octopetala L., 1753 ( Esp. caract. )
Salix herbacea L., 1753 ( Esp. caract. )
Salix retusa L., 1759 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)