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Biotopes & milieux

Biotope - Typologie Européenne EUNIS

C3.51 - Niveau 4 : Gazons ras eurosibériens à espèces annuelles amphibies
Description
Dwarf oligo-mesotrophic annual communities of recently emerged muds and sands of the nemoral, boreonemoral and boreal regions. Terrestrial forms of amphibious species and annual species are frequent. A dynamic habitat, and several aspects can occur during the vegetation cycle. If the substrate is sufficiently wet, and also in advanced successional stages, the moss layer is abundant. Typical species are Juncus bufonius, Cyperus fuscus, Cyperus flavescens and other species from vegetation of class Isoeto-Nanojuncetea.
Taxons (Liens actifs si espèces présentes)
Cyperus flavescens L., 1753, Cyperus fuscus L., 1753, Juncus bufonius L., 1753,
C3.512 - Niveau 5 : Pelouses des lettes dunaires à Centaurium
Description
Pioneer formations of humid calcareous sands of Atlantic and sub-Atlantic Europe, recorded from the North Sea coasts of northern France, Belgium, the Netherlands, England, Germany and Denmark, and from the Baltic coast of Germany, with Samolus valerandi, Centaurium littorale, Centaurium erythraea, Centaurium pulchellum, Gentianella amarella, Blackstonia perfoliata, Juncus bufonius, characteristic of humid dune slacks and dune pool fringes, on soils with low salinity.
Taxons (Liens actifs si espèces présentes)
Blackstonia perfoliata (L.) Huds., 1762 ( Esp. caract. )
Centaurion pulchellum (Sw.) Druce, 1898 [nom. inval.] ( Esp. caract. )
Centaurium erythraea Rafn, 1800 ( Esp. caract. )
Centaurium littorale (Turner) Gilmour, 1937 ( Esp. caract. )
Gentianella amarella (L.) Börner, 1912 ( Esp. caract. )
Juncus bufonius L., 1753 ( Esp. caract. )
Samolus valerandi 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