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RESEARCH PRODUCT

Rumicetum palustris (TIMÁR 1950) W. FISCHER 1978, new plant community from Bidentetea tripartiti R. Tx., LOHM. ET Prsg 1950 class in SW Poland

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Natural water reservoirs are very valuable floristic sites in Poland. Among them, the most important for preservation of biodiversity of plant communities are lakes, rivers, oxbow lakes and fishponds. The long-term process of human pressure on habitats of this type caused disturbance to their biological balance. Changes in the water regime, industrial development and chemisation of agriculture, especially in the period of last two hundred years, led to systematic disappearance of localities of many plant communities. Rumicetum palustris (Timár 1950) W. Fischer 1978, of Bidentetea tripartiti R. Tx., Lohm. et Prsg 1950 class, has been described for the first time in Hungary and Germany. This association rarely develop, usually on muddy or sandy banks or bottoms of lakes, ponds, rivers, oxbow lakes. In Poland, Rumicetum palustris has not been yet observed. During current studies of phytocenosis Rumicetum palustris in 2005–2014 were found six localities in fish-breeding ponds and oxbow lakes of Odra river in south-west Poland.