The phytosociological characteristic and habitat requirements of the Phragmitetum communis (Gams, 1927) Schmale 1939 phytocoenoses in the lakes of the Wielkopolski National Park

In the summers of 1996 and 1997, the phytosociological investigations of ph ytocoenoses of Phragmitetum communis were carried out. Samples of the water and the substrate were also analyzed. Phytosociological characteristic was presented, and ranges of physical and chemical properties of habitats were found. It was also found that phytocoenoses of the investigated associatio n have an indicative value in relation to definite properties of the water and the substrate, and could be indicators of the habitat conditions. Compa rison of habitat requirements of phytocoenoses investigated in the Wielkopo lska region (the Wielkopolski National Park, Western Poland) to those inves tigated in north-eastern region of Poland (Klosowski, 1992) pointed out the indicative value to be partly the same and partly different in different r egions.