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Biotope - Typologie Européenne EUNIS
E1.B - Niveau 3 : Pelouses des sols métallifères
Description
Dry, short grasslands, often rich in lichens and mosses, colonizing western and central European soils with a high content in heavy metals such as zinc and lead, and comprising uniquely adapted species, ecotypes or populations mostly related to, or derived from, otherwise montane, boreomontane or steppic species; heavy metal grasslands of distinctly alpine affinities, though spanning an altitudinal range that extends from the montane level and lowland dealpine stations to the subalpine and alpine levels, are included. Vegetation of alliance Violetalia calaminariae.
Taxons (Liens actifs si espèces présentes)
E1.B2 - Niveau 4 : Pelouses calaminaires
Description
Open formations colonizing heavy metal soils, either natural or resulting from past mining operations, in rapid regression and limited to a few stations in eastern Belgium, western Rhineland, Westphalia and Lower Saxony, and to one station in the southern Netherlands, with outposts in northern France, comprised of a highly specialised flora with the endemics Viola calaminaria, Viola guestphalica, Thlaspi caerulescens (Thlaspi alpestre ssp. calaminare) and Festuca aquisgranensis (Festuca ophioliticola ssp. calaminaria), with Minuartia verna var. hercynica, Silene vulgaris ssp. humilis and Armeria halleri, limited to this formation and the next, and with the steppic, central European Festuca valesiaca.
Taxons (Liens actifs si espèces présentes)
Armeria halleri Wallr., 1844 ( Esp. caract. )
Festuca aquisgranensis Patzke & G.K.Br., 1990 ( Esp. caract. )
Festuca ophioliticola subsp. calaminaria Auquier, 1977 ( Esp. caract. )
Festuca valesiaca Schleich. ex Gaudin, 1811 ( Esp. caract. )
Silene vulgaris subsp. humilis (R.Schub.) Rauschert, 1966 ( Esp. caract. )
Thlaspi caerulescens J.Presl & C.Presl, 1819 ( Esp. caract. )
Viola calaminaria (Ging.) Lej., 1824 ( Esp. caract. )
Festuca aquisgranensis Patzke & G.K.Br., 1990 ( Esp. caract. )
Festuca ophioliticola subsp. calaminaria Auquier, 1977 ( Esp. caract. )
Festuca valesiaca Schleich. ex Gaudin, 1811 ( Esp. caract. )
Silene vulgaris subsp. humilis (R.Schub.) Rauschert, 1966 ( Esp. caract. )
Thlaspi caerulescens J.Presl & C.Presl, 1819 ( Esp. caract. )
Viola calaminaria (Ging.) Lej., 1824 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)
Faible
Forte
— nb espèces indicatrices par classe