Vegetation Science Group

Department of Botany and Zoology | Faculty of Science | Masaryk University

Vegetation of the Czech Republic

Association VBA07
Potamo natantis-Polygonetum natantis Knapp et Stoffers 1962

Potamo natantis-Polygonetum natantis

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This vegetation type is dominated by Persicaria amphibia, which forms usually open stands with leaves floating on the water surface. It occurs in mesotrophic to eutrophic water bodies with still or slowly moving water, e.g. at the margins of fishponds and water reservoirs, in fish storage ponds, flooded sand pits, channels, oxbows and other types of alluvial pools, and lentic sections of streams. It is associated with both early and late stages of terrestrialization. The dominant species is well adapted to habitat desiccation; in such conditions, it occurs in a terrestrial growth form. Localities of this association are scattered across the Czech Republic from the lowlands to mountain areas.

Orig. (Knapp & Stoffers 1962): Potameto-Polygonetum natantis .Polygonum amphibium f. natans = Persicaria amphibia, Potamogeton natans)

Syn.: Polygonetum natantis von Soó 1927 (§ 2b, nomen nudum), Stad. Polygonum amphibium Tímár 1950 (§ 3d), Polygonum amphibium aquaticum-Gesellschaft Görs in Oberdorfer et al. 1977, Polygonetum natantis Soó ex Brzeg et Wojterska 2001

Diagnostic species: Persicaria amphibia

Constant species: Persicaria amphibia

Dominant species: Persicaria amphibia

Formal definition: Persicaria amphibia cover > 25 % NOT Group Cirsium arvense NOT Group Eleocharis ovata NOT Group Malva neglecta NOT Alopecurus pratensis cover > 25 % NOT Bidens frondosa cover > 5 % NOT Nuphar lutea cover > 25 % NOT Persicaria lapathifolia cover > 5 %

Source: Šumberová K. (2011): VBA07 Potamo natantis-Polygonetum natantis Knapp et Stoffers 1962. In: Chytrý M. (ed.), Vegetace České republiky. 3. Vodní a mokřadní vegetace [Vegetation of the Czech Republic 3. Aquatic and wetland vegetation]. Academia, Praha, pp. 127-130.