Vegetation Science Group

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

Vegetation of the Czech Republic

Association RBA05
Junco subnodulosi-Schoenetum nigricantis Allorge 1921

Junco subnodulosi-Schoenetum nigricantis

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This association occurs in the most calcium-rich fens in the Hercynian part of the Czech Republic, which are located in the Cretaceous bedrock area of central Bohemia. Tussocks of Schoenus.ferrugineus or S. nigricans dominate the vegetation. Short sedges and other fen specialists grow between the tussocks. The moss layer is species-poor or absent. The vegetation tends to be stressed by phosphorus and iron deficiency, high salt content and fluctuating water regime with seasonal desiccation of the upper soil layers.

Nomen mutatum propositum et nomen inversum propositum

Orig. (Allorge 1921): Association à Schoenus nigricans et Juncus obtusiflorus .Juncus obtusiflorus = J. subnodulosus)

Syn.: Schoenetum nigricantis Koch 1926, Schoenetum nigricantis bohemicum Klika 1929, Orchido-Schoenetum nigricantis Oberdorfer 1957, Schoenetum ferruginei sensu auct. non Du Rietz 1925 (pseudonym)

Diagnostic species: Carex panicea. Dactylorhiza incarnata, Gentianella amarella, Juncus subnodulosus. Molinia caerulea s. l., Orchis palustris, Parnassia palustris, Phragmites australis. Pinguicula vulgaris subsp. bohemica. P. v. subsp. vulgaris. Polygala amarella. Potentilla erecta, Schoenus ferrugineus, S. ferrugineus × nigricans, S. nigricans, Succisa pratensis. Taraxacum sect. Palustria, Tetragonolobus maritimus

Constant species: Carex panicea. Lythrum salicaria. Molinia caerulea s. l., Parnassia palustris. Phragmites australis. Potentilla erecta. Sanguisorba officinalis. Schoenus nigricans. Succisa pratensis. Tetragonolobus maritimus

Dominant species: Bromus erectus, Carex panicea, Molinia caerulea s. l., Schoenus ferrugineus. S. ferrugineus × nigricans, S. nigricans; Campylium stellatum, Scorpidium revolvens s. l. (S. cossonii)

Formal definition: Schoenus ferrugineus cover > 5 % OR Schoenus nigricans cover > 5 %

Source: Hájek M. & Hájková P. (2011): RBA05 Junco subnodulosi-Schoenetum nigricantis Allorge 1921. 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. 636-639.