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Biotope - Typologie Européenne EUNIS
C1.23 - Niveau 4 : Végétations immergées enracinées des plans d'eau mésotrophes
Description
'Formations of water bodies constituted by submerged, rooted, perennial phanerogams with often emerging flower spikes, in particular entirely immersed pondweeds of genus Potamogeton. Some habitats of this unit can be dominated by other species, such as Zannichellia palustris, Elodea canadensis, Elodea nuttallii, Ceratophyllum submersum, Myriophyllum spicatum and Najas marina.
Taxons (Liens actifs si espèces présentes)
C1.232 - Niveau 5 : Formations à petits Potamots
Description
Formations of smaller pondweeds, in particular, Potamogeton crispus, Potamogeton filiformis, Potamogeton pusillus, Potamogeton obtusifolius, Potamogeton berchtoldii, Potamogeton trichoides, Potamogeton acutifolius, Potamogeton pectinatus, Potamogeton nitens, Potamogeton friesii (Potamogeton mucronatus), Groenlandia densa, waterthymes and waterweeds (Elodea spp., Hydrilla spp., Ottelia spp.), horned pondweeds (Zannichellia palustris s.l.), naiads (Najas spp.), tapegrass (Vallisneria spiralis), water crowfoots (Ranunculus circinatus) that colonize shallower, more sheltered Palaearctic waters. Eurasian formations dominated by usually free-floating hornworts of genus Ceratophyllum, in particular by Ceratophyllum demersum, are included because of closer ecological and physiognomic similarity with communities of this unit than with those of unit C1.32.
Taxons (Liens actifs si espèces présentes)
Ceratophyllum demersum L., 1753 ( Esp. caract. )
Ceratophyllum L., 1753 ( Esp. caract. )
Elodea Michx., 1803 ( Esp. caract. )
Groenlandia densa (L.) Fourr., 1869 ( Esp. caract. )
Hydrilla Rich., 1814 ( Esp. caract. )
Najas L., 1753 ( Esp. caract. )
Ottelia R.Hedw., 1806 ( Esp. caract. )
Potamogeton acutifolius Link, 1818 ( Esp. caract. )
Potamogeton berchtoldii Fieber, 1838 ( Esp. caract. )
Potamogeton crispus L., 1753 ( Esp. caract. )
Potamogeton filiformis Pers., 1805 ( Esp. caract. )
Potamogeton friesii Rupr., 1845 ( Esp. caract. )
Potamogeton mucronatus Schrad. ex Sond., 1851 ( Esp. caract. )
Potamogeton obtusifolius Mert. & W.D.J.Koch, 1823 ( Esp. caract. )
Potamogeton pectinatus L., 1753 ( Esp. caract. )
Potamogeton pusillus L., 1753 ( Esp. caract. )
Potamogeton trichoides Cham. & Schltdl., 1827 ( Esp. caract. )
Ranunculus circinatus Sibth., 1794 ( Esp. caract. )
Vallisneria spiralis L., 1753 ( Esp. caract. )
Zannichellia palustris L., 1753 ( Esp. caract. )
Ceratophyllum L., 1753 ( Esp. caract. )
Elodea Michx., 1803 ( Esp. caract. )
Groenlandia densa (L.) Fourr., 1869 ( Esp. caract. )
Hydrilla Rich., 1814 ( Esp. caract. )
Najas L., 1753 ( Esp. caract. )
Ottelia R.Hedw., 1806 ( Esp. caract. )
Potamogeton acutifolius Link, 1818 ( Esp. caract. )
Potamogeton berchtoldii Fieber, 1838 ( Esp. caract. )
Potamogeton crispus L., 1753 ( Esp. caract. )
Potamogeton filiformis Pers., 1805 ( Esp. caract. )
Potamogeton friesii Rupr., 1845 ( Esp. caract. )
Potamogeton mucronatus Schrad. ex Sond., 1851 ( Esp. caract. )
Potamogeton obtusifolius Mert. & W.D.J.Koch, 1823 ( Esp. caract. )
Potamogeton pectinatus L., 1753 ( Esp. caract. )
Potamogeton pusillus L., 1753 ( Esp. caract. )
Potamogeton trichoides Cham. & Schltdl., 1827 ( Esp. caract. )
Ranunculus circinatus Sibth., 1794 ( Esp. caract. )
Vallisneria spiralis L., 1753 ( Esp. caract. )
Zannichellia palustris 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