This type of marsh vegetation, dominated by Scirpus radicans, occurs in disturbed habitats with fluctuating water table, specifically in littoral zones of fishponds, alluvial pools and water reservoirs. Substrate is usually acidic and contains a high proportion of organic sediment. Populations of S. radicans often germinate on exposed fishpond bottoms, then spread through runners, but disappear in the next years if the water table raises again. This marsh type occurs mainly in cool colline areas such as the Bohemian-Moravian Uplands, Třeboň Basin and elsewhere in southern Bohemia.