Vegetation Science Group

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

Vegetation of the Czech Republic

Association VDA02
Isoëtetum lacustris Szańkowski et Kłosowski ex Čtvrtlíková et Chytrý in Chytrý 2011

Isoëtetum lacustris

Photo on botanickafotogalerie.cz

This association includes a single monospecific stand of Isoëtes lacustris on the bottom of Černé Lake at an altitude of 1008 m in the Šumava Mountains. It occurs mainly in depths of 1–4 m. The lake is situated on mica schist bedrock. Lake water is naturally oligotrophic and acidic, but its pH decreased below 5 due to acid rain in the 1960s–1990s. Although water chemistry has begun to slowly improve, concentrations of toxic aluminium remain high and the Isoëtes population does not reproduce in this lake.

Syn.: Isoëtetum lacustris Szańkowski et Kłosowski 1996 (§ 5)

Diagnostic species: Isoëtes lacustris

Constant species: Isoëtes lacustris

Dominant species: –

Formal definition: Isoëtes lacustris cover > 5 %

Source: Čtvrtlíková M. (2011): VDA02 Isoëtetum lacustris Szańkowski et Kłosowski ex Čtvrtlíková et Chytrý in Chytrý 2011. 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. 273-276.