Vegetation of the Czech Republic
Sagittario sagittifoliae-Sparganietum emersi Tüxen 1953
This association includes stands of Sagittaria sagittifolia and/or Sparganium emersum. In still water both species usually occur in an emergent form, while in rivers they occur in a form with leaves that are partly submerged and partly float on the water surface. This vegetation type is typical of eutrophic water bodies such as fishponds, oxbows, alluvial pools and lentic river sections. Water is usually 20–80 cm deep, but in streams it can be up to 120 cm deep. In summer water table can recede so far as to expose the bottom. Dominant species are capable of regeneration from their underground organs after a period of substrate desiccation. This association occurs in lowlands and colline areas.
Nomen mutatum propositum
Orig. (Tüxen 1953): Sagittaria sagittifolia-Sparganium simplex-Ass. (Sparganium simplex = S. emersum)
Diagnostic species: Sagittaria sagittifolia, Sparganium emersum
Constant species: Lemna minor, Sparganium emersum
Dominant species: Lemna minor, Sagittaria sagittifolia, Sparganium emersum
Formal definition: (Sagittaria sagittifolia cover > 25 % OR Sparganium emersum cover > 25 % OR (Sagittaria sagittifolia cover > 10 % AND Sparganium emersum cover > 10 %)) NOT Butomus umbellatus cover > 25 % NOT Glyceria maxima cover > 25 % NOT Juncus effusus cover > 50 % NOT Potamogeton gramineus cover > 25 % NOT Rorippa amphibia cover > 25 % NOT Sparganium erectum cover > 25 %
Source: Šumberová K. & Hroudová Z. (2011): MCC03 Sagittario sagittifoliae-Sparganietum emersi Tüxen 1953. 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. 451-456.