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Biotope - Typologie Européenne EUNIS
E4.1 - Niveau 3 : Combes à neige avec végétation
Description
Vegetated areas that retain late-lying snow. Dominants may be mosses, liverworts, macrolichens, graminoids, ferns and small herbs. Snow patches are well developed in boreal and arctic mountains and in subarctic lowlands; they are well represented, though of much smaller extent, above the tree limit in the Alps, Pyrenees, Carpathians and Caucasus. They are found very locally in the Paeonian mountains, Sierra Nevada, Cordillera Central, Monti Sibillini, Abruzzi, Scottish Highlands and Sudeten.
Taxons (Liens actifs si espèces présentes)
E4.12 - Niveau 4 : Pelouses et habitats herbacés boréo-alpins calciclines des combes à neige
Description
Herbaceous snow-patch swards of the Alpids, characteristic of calcareous soils under snow for long periods, with Arabis caerulea, Carex atrata, Ranunculus alpestris, Saxifraga androsacea and other calciphile snowfield, snowbed and snow-patch communities of boreal and arcto-alpine mountains formed by small herbs, grasses or mosses. Dwarf, underground-stemmed willows may also be present but not dominant (c.f. unit F2.12).
Taxons (Liens actifs si espèces présentes)
Arabis caerulea (All.) Haenke, 1789 ( Esp. caract. )
Carex atrata L., 1753 ( Esp. caract. )
Ranunculus alpestris L., 1753 ( Esp. caract. )
Saxifraga androsacea L., 1753 ( Esp. caract. )
Carex atrata L., 1753 ( Esp. caract. )
Ranunculus alpestris L., 1753 ( Esp. caract. )
Saxifraga androsacea L., 1753 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)