M. Szańkowski, S. Kłosowski
Nov 1, 1999
A comparative analysis of the habitats of seven nymphaeid associations: Potamogetonetum natantis, Polygonetum natantis, Nuphar-Nymphaeetum albae, Nymphaeetum candidae, Nupharetum pumilae, Trapetum natantis and Nymphoidetum peltatae, was made within Poland. On the basis of water and substrate properties in the phytocoenoses analysed, it was demonstrated that most nymphaeid associations in Poland are distinctly associated with specific habitat conditions. Trapetum natantis occurs in neutral waters, poor in NH4+, but markedly rich in dissolved organic matter, K+, PO43−, total Fe and Ca2+. It develops best on slightly acidic mineral substrates poor in Ca2+ and Na+, but markedly rich in PO43− and NO3. Nymphoidetum peltatae occurs in alkaline waters with high concentrations of Na+, C1- and NO3- and with relatively high concentrations of K+ and PO43−. Its substrates are mineral, poor in SO42− and total N and rich in NO3-, PO43− and K+. Nupharetum pumilae develops in waters extremely poor in SO42−, Na+, K+ and Ca2+, but rich in NO3- and dissolved organic matter. It mainly occurs on organic substrates poor in Ca2+ and Na+. Nymphaeetum candidae and Potamogetonetum natantis are mainly found in mesotrophic waters. Polygonetum natantis mainly inhabits mineral substrates poor in NO3-, Na+ and dissolved SiO2. Nupharo-Nymphaeetum albae occurs in a wide range of most types of habitat.