⌘K
Biotope - Typologie Européenne EUNIS
C2.2 - Niveau 3 : Cours d'eau permanents, non soumis aux marées, à écoulement turbulent et rapide
Description
Permanent water courses with fast-flowing turbulent water and their associated animal and microscopic algal pelagic and benthic communities. Rivers, streams, brooks, rivulets, rills, torrents, waterfalls, cascades and rapids are included. The bed is typically composed of rocks, stones or gravel with only occasional sandy and silty patches. Features of the river bed, uncovered by low water or permanently emerging, such as gravel or rock islands and bars are treated as the littoral zone (C3). Includes high, mid and low-altitude, usually small to medium-sized streams as defined by the Water Framework Directive.
Taxons (Liens actifs si espèces présentes)
C2.25 - Niveau 4 : Végétations acides oligotrophes des cours d'eau à débit rapide
Description
Euhydrophyte communities of Palaearctic streams poor in nutrients and in lime, with, in particular, Myriophyllum alterniflorum, Potamogeton polygonifolius, Callitriche hamulata, Littorella uniflora, Juncus bulbosus, Scirpus fluitans or acidophilous mosses and algae. In Iceland, Montia fontana, Potamogeton filiformis, Ranunculus trichophyllus (Ranunculus confervoides, Ranunculus aquatilis var. diffusus) and Fontinalis antipyretica characterize the community in clear, slowly flowing waters.
Taxons (Liens actifs si espèces présentes)
Callitriche hamulata Kütz. ex W.D.J.Koch, 1837 ( Esp. caract. )
Fontinalis antipyretica Hedw., 1801 ( Esp. caract. )
Juncus bulbosus L., 1753 ( Esp. caract. )
Littorella uniflora (L.) Asch., 1864 ( Esp. caract. )
Montia fontana L., 1753 ( Esp. caract. )
Myriophyllum alterniflorum DC., 1815 ( Esp. caract. )
Potamogeton filiformis Pers., 1805 ( Esp. caract. )
Potamogeton polygonifolius Pourr., 1788 ( Esp. caract. )
Ranunculus confervoides (Fr.) Fr., 1846 ( Esp. caract. )
Ranunculus trichophyllus Chaix, 1785 ( Esp. caract. )
Scirpus fluitans L., 1753 ( Esp. caract. )
Fontinalis antipyretica Hedw., 1801 ( Esp. caract. )
Juncus bulbosus L., 1753 ( Esp. caract. )
Littorella uniflora (L.) Asch., 1864 ( Esp. caract. )
Montia fontana L., 1753 ( Esp. caract. )
Myriophyllum alterniflorum DC., 1815 ( Esp. caract. )
Potamogeton filiformis Pers., 1805 ( Esp. caract. )
Potamogeton polygonifolius Pourr., 1788 ( Esp. caract. )
Ranunculus confervoides (Fr.) Fr., 1846 ( Esp. caract. )
Ranunculus trichophyllus Chaix, 1785 ( Esp. caract. )
Scirpus fluitans 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