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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)
D4.1N14 - Niveau 6 : Sources calcaires à petites herbacées
Description
Communities of calcareous springs, flushes, seeps or parts of spring systems of nemoral and boreal Europe in which, alongside an abundant representation of bryophytes, assemblages of small dicots or sedges contribute significantly to the formation's appearance. Mosses of genus Cratoneuron usually remain the main bryophyte component, and there may be a modest amount of tufa encrustation and deposition. Characteristic vascular species include, in particular, Cochlearia pyrenaica, Arabis soyeri, Pinguicula vulgaris, Saxifraga aizoides, and fen species belonging to the cortège of the Caricetalia davallianae.
Taxons (Liens actifs si espèces présentes)
Arabis soyeri Reut. & A.L.P.Huet, 1853 ( Esp. caract. )
Cochlearia pyrenaica DC., 1821 ( Esp. caract. )
Cratoneuron (Sull.) Spruce, 1867 ( Esp. caract. )
Pinguicula vulgaris L., 1753 ( Esp. caract. )
Saxifraga aizoides L., 1753 ( Esp. caract. )
Cochlearia pyrenaica DC., 1821 ( Esp. caract. )
Cratoneuron (Sull.) Spruce, 1867 ( Esp. caract. )
Pinguicula vulgaris L., 1753 ( Esp. caract. )
Saxifraga aizoides L., 1753 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)
Faible
Forte
— nb espèces indicatrices par classe