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Biotope - Typologie Européenne EUNIS
D2.3 - Niveau 3 : Tourbières de transition et tourbières tremblantes
Description
Incompletely terrestrialized wetlands occupied by peat-forming vegetation with acid groundwater or (for vegetation rafts) acid underlying pool or lake water. Characteristic species are Calla palustris, Carex chordorrhiza, Carex diandra, Carex heleonastes, Carex lasiocarpa, Carex limosa, Carex rostrata, Menyanthes trifoliata, Potentilla palustris, Rhynchospora alba, Scheuchzeria palustris. Included are rafts of Sphagnum and Eriophorum (D2.38) and quaking rafts of Molinia caerulea (D2.3D). Excluded are stands of vegetation fringing water bodies (C3.2) unless the vegetation raft is sufficiently extensive to count as a habitat in its own right.
Taxons (Liens actifs si espèces présentes)
D2.3H - Niveau 4 : Communautés des tourbes et des sables humides, ouverts et acides, avec Rhynchospora alba et Drosera
Description
Sparse, bryophyte-poor, sedge and rush communities of bare, extremely wet peat muds of boreal mires, frequently inundated, remaining wet for a prolonged part of dry periods, together with pioneer communities of humid exposed peat or, sometimes, sand, forming on stripped areas of blanket bogs or raised bogs, as well as on naturally seep- or frost-eroded areas of wet heaths and bogs, in flushes and in the fluctuation zone of oligotrophic pools with sandy, slightly peaty substratum. Vegetation of alliance Rhynchosporion albae, the most typical species are Rhynchospora alba, Hydrocotyle vulgaris, Juncus bulbosus, Lycopodiella inundata, Sphagnum subsecundum, Sphagnum denticulatum and Sphagnum inundatum.
Taxons (Liens actifs si espèces présentes)
Hydrocotyle vulgaris L., 1753 ( Esp. caract. )
Juncus bulbosus L., 1753 ( Esp. caract. )
Lycopodiella inundata (L.) Holub, 1964 ( Esp. caract. )
Rhynchospora alba (L.) Vahl, 1805 ( Esp. caract. )
Sphagnum denticulatum Brid., 1826 ( Esp. caract. )
Sphagnum inundatum Russow, 1894 ( Esp. caract. )
Sphagnum subsecundum Nees, 1819 ( Esp. caract. )
Juncus bulbosus L., 1753 ( Esp. caract. )
Lycopodiella inundata (L.) Holub, 1964 ( Esp. caract. )
Rhynchospora alba (L.) Vahl, 1805 ( Esp. caract. )
Sphagnum denticulatum Brid., 1826 ( Esp. caract. )
Sphagnum inundatum Russow, 1894 ( Esp. caract. )
Sphagnum subsecundum Nees, 1819 ( 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