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Biotope - Typologie Européenne EUNIS
D2.222 - Niveau 5 : Bas-marais subatlantiques à Laîche vulgaire, Laîche blanchâtre et Laîche étoilée
Description
Acidic fen communities of lowland, collinar and montane areas of western and northern Central Europe, excluding the British Isles and the Iberian peninsula, extending eastward in the Baltic plain to Lithuania. Carex nigra, Carex canescens and Carex echinata are always represented, often accompanied by dispersed Carex rostrata. Rushes, Juncus filiformis, Juncus articulatus, Juncus acutiflorus, Juncus effusus, may be numerous, often marking the transition towards humid grasslands of the Molinietalia, the moss layer is formed by Sphagnum apiculatum, Sphagnum cuspidatum, Sphagnum recurvum and Polytrichum commune in the more oligotrophic, acidic sites, by brown mosses Drepanocladus fluitans, Calliergon stramineum, Calliergon cuspidatum, in more mesotrophic situations. Other characteristic species include Eriophorum angustifolium, Eriophorum vaginatum, Agrostis canina, Molinia caerulea, Pedicularis palustris, Viola palustris, Parnassia palustris, Comarum palustre, Drosera rotundifolia, Menyanthes trifoliata, Ranunculus flammula and Willemetia stipitata. Included in this unit are the extensive peatlands of Hercynian valley fens, often invaded by rushes, and with characters both of the transition mires and of the humid grasslands.
Taxons (Liens actifs si espèces présentes)
Agrostis canina L., 1753 [nom. et typ. cons.], Calliergon cuspidatum (Hedw.) Kindb., 1894, Calliergon stramineum (Dicks. ex Brid.) Kindb., 1894, Carex canescens L., 1753, Carex echinata Desf., 1799, Carex nigra All., 1785, Carex rostrata Stokes, 1787 [nom. et typ. cons.], Comarum palustre L., 1753, Drepanocladus fluitans (Hedw.) Warnst., 1903, Drosera rotundifolia L., 1753, Eriophorum angustifolium Roth, 1802, Eriophorum vaginatum L., 1753, Juncus acutiflorus Ehrh. ex Hoffm., 1791, Juncus articulatus L., 1753, Juncus effusus L., 1753, Juncus filiformis L., 1753, Menyanthes trifoliata L., 1753, Molinia caerulea (L.) Moench, 1794, Parnassia palustris L., 1753, Pedicularis palustris L., 1753, Polytrichum commune Hedw., 1801, Ranunculus flammula L., 1753, Sphagnum cuspidatum Ehrh. ex Hoffm., 1796, Sphagnum recurvum P.Beauv., 1805, Viola palustris L., 1753, Willemetia stipitata (Jacq.) Dalla Torre, 1882,
D2.2223 - Niveau 6 : Bas-marais subatlantiques à Carex et Sphagnum
Description
Sphagnum peatlands in which the herbaceous sward is formed by Carex nigra, Carex canescens, Carex echinata and Carex rostrata, generally with Eriophorum angustifolium and Eriophorum vaginatum. These very wet formations are closely related to transition mires.
Taxons (Liens actifs si espèces présentes)
Carex canescens L., 1753 ( Esp. caract. )
Carex echinata Desf., 1799 ( Esp. caract. )
Carex L., 1753 ( Esp. caract. )
Carex nigra All., 1785 ( Esp. caract. )
Carex rostrata Stokes, 1787 [nom. et typ. cons.] ( Esp. caract. )
Eriophorum angustifolium Roth, 1802 ( Esp. caract. )
Eriophorum vaginatum L., 1753 ( Esp. caract. )
Sphagnum L., 1753 ( Esp. caract. )
Carex echinata Desf., 1799 ( Esp. caract. )
Carex L., 1753 ( Esp. caract. )
Carex nigra All., 1785 ( Esp. caract. )
Carex rostrata Stokes, 1787 [nom. et typ. cons.] ( Esp. caract. )
Eriophorum angustifolium Roth, 1802 ( Esp. caract. )
Eriophorum vaginatum L., 1753 ( Esp. caract. )
Sphagnum L., 1753 ( 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