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Biotope - Typologie Européenne EUNIS
D4.1N1 - Niveau 5 : Tourbières de sources calcaires médio-européennes
Description
Communities of calcareous springs, seeps and flushes of the nemoral and lowland boreal western Palaearctic domaine in which tufa formation is absent or limited to encrustation of the constituting mosses without building of large deposits. They are characteristic of high altitudes, maritime climates and semishaded stations, all situations unfavourable to tufa formation.
Taxons (Liens actifs si espèces présentes)
D4.1N13 - Niveau 6 : Sources à Prêle panachée
Description
Mires of spring or seep systems of boreal and nemoral Europe fed by lime-rich waters over sand or gravel soils physiognomically dominated by the presence, alongside Cratoneurion commutati formations, of communities belonging to or related to arcto-alpine riverine swards (unit D4.2) or subalpine willowherb stream communities (unit C3.55) comprising in particular stands of the perennial horsetail Equisetum variegatum.
Taxons (Liens actifs si espèces présentes)
Equisetum variegatum auct. non Schleich. ex F.Weber & D.Mohr, 1807 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)