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Biotope - Typologie Européenne EUNIS
D2.2 - Niveau 3 : Bas-marais oligotrophes et tourbières des sources d'eau douce
Description
Peatlands, flushes and vegetated springs with moderately acid ground water, within valley mires or on hillsides. As in the rich fens, the water level is at or near the surface of the substratum and peat formation depends on a permanently high watertable. Poor-fen vegetation is typically dominated by small sedges (Carex canescens, Carex echinata, Carex nigra, Eriophorum angustifolium, Eriophorum scheuchzeri, Trichophorum cespitosum), with pleurocarpous mosses (Calliergonella cuspidata, Calliergon sarmentosum, Calliergon stramineum, Drepanocladus exannulatus, Drepanocladus fluitans) or sphagna (Sphagnum cuspidatum, Sphagnum papillosum, Sphagnum recurvum agg., Sphagnum russowii, Sphagnum subsecundum agg.). Other characteristic vascular plants are Agrostis canina, Cardamine pratensis, Juncus filiformis, Ranunculus flammula and Viola palustris. Soft-water spring mires (D2.2C) are often dominated by Montia fontana or bryophytes (Bryum spp., Philonotis spp., Pohlia spp.). Excluded are the water body of soft-water springs (C2.1), and incompletely terrestrialized fringing vegetation (C3.2) or vegetation rafts (D2.3).
Taxons (Liens actifs si espèces présentes)
Agrostis canina L., 1753 [nom. et typ. cons.], Bryozoa sp., Carex sp., Carex sp., Corallinaceae sp., Corallinaceae sp., Corallinaceae sp., Corallinaceae sp., Cratoneuron sp., Crisiidae sp., Ectocarpaceae sp., Eriophorum sp., Lithophyllum sp., Marenzelleria sp., Nardus sp., Narthecium sp., Nematoda sp., Oligochaeta sp., Oligochaeta sp., Peyssonnelia sp., Pohlia Hedw., 1801, Porifera sp., Scrupocellaria sp., Tubificoides sp., Zygogonium sp.,
D2.27 - Niveau 4 : Bas-marais acides dunaires à Laîches
Description
Formations of Carex nigra, Carex trinervis, Carex x timmiana, Juncus anceps, Juncus subnodulosus and introduced Vaccinium macrocarpum, restricted to wet, peaty, acidified dune slacks of the North Sea coast of France and the Netherlands and of the Dutch and German North Sea islands. This unit is related to B1.83.
Taxons (Liens actifs si espèces présentes)
Carex nigra All., 1785 ( Esp. caract. )
Carex trinervis Degl. ex Loisel., 1807 ( Esp. caract. )
Carex x timmiana Junge, 1906 ( Esp. caract. )
Juncus anceps Laharpe, 1827 ( Esp. caract. )
Juncus subnodulosus Schrank, 1789 ( Esp. caract. )
Carex trinervis Degl. ex Loisel., 1807 ( Esp. caract. )
Carex x timmiana Junge, 1906 ( Esp. caract. )
Juncus anceps Laharpe, 1827 ( Esp. caract. )
Juncus subnodulosus Schrank, 1789 ( Esp. caract. )
Analyse Ecologie du milieu (En fonction des espèces présentes)
Faible
Forte
— nb espèces indicatrices par classe
Humidité
Réaction du sol (pH)
Nutriments
Lumière
Matière organique
Granulométrie
Salinité