22.422 - Small pondweed communities

Classification des habitats du Paléarctique (2001)

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 22.41.

Correspondances phytosociologiques

Potamogetonetea pectinati: Potamogetonetalia pectinati: Potamogetonion pectinati p. (Parvopotamion): Potamogetonetum mucronati, Potamogetonetum trichoidis, Potamogetonetum filiformis p., Potamogetonetum acutifolii, Potamogetonetum obtusifolii, Potamogetonetum pectinati, Potamogetonetum nitentis, Najadetum minoris, Najadetum marinae, Najadetum intermediae, Elodeetum canadensis, Ranunculo circinati-Myriophylletum spicati, Zannichellietum palustris, Zannichellietum polycarpae; Nymphaeion albae: Hydrilletum verticillati, Potamogeto-Najadetum, Potamogeto-Vallisnerietum, Ceratophyllo-Potamogetonetum crispi i.a.

Bibliographie

Devillers P., Devillers-Terschuren J. & Vander Linden C., 2001. PHYSIS Palaearctic Habitat Classification Database. Updated to 10 December 2001. Institut Royal des Sciences Naturelles, Bruxelles. (Source)

Lebrun & al., 1949: units 56, 58; Ellenberg, 1963, 1988; Holub & al., 1967; Vanden Berghen, 1969b: 75; Duvigneaud, 1972; Horvat & al., 1974: 182, 222, 272, 404; Westhoff and den Held, 1975; Rivas-Martinez, 1975c; Brasseur & al., 1977; Bellot Rodriguez, 1979; Bournérias, 1979; Margot, 1983; Moravec & al., 1983; Géhu, 1984a; Peinado Lorca & al., 1984: 174; Nordiska ministerradet, 1984: unit 6.3.2.2; Matuszkiewicz, 1984: 72-73, 135-138; Bournérias, 1984: 133-135; Ochyra, 1985; den Held, 1985: 43; Moravec, 1986; Van Wijk and Verbeek, 1986; Delescaille, 1987: 70; Scohy & al., 1987; Poldini, 1989: 115, 125-128; Lanfranco, 1989: 37; Scohy and Philippart, 1990; Oberdorfer, 1990: 35; Elias & al., 1991; Korotkov & al., 1991: 16-19; Palmer & al., 1992; Pott, 1992: 57-61; Oberdorfer, 1992a; Schratt, 1993; Moureau & al., 1993; Påhlsson, 1994: unit 6.3.2.2; Schubert & al., 1995: 201-203; Ilijanic, 1996: 109; Seliskar, 1998; Hoda & al., 1998: 5; Kristinsson, 1998: 178-181; Micevski, 1999.