The relationships between community structure and soil properties (pH, P, N, Ca, Mg, CaCO₃ and clay content) were examined in a swamp forest from the northern part of Turkey. Statistically significant correlations were found between the soil variables and three different associations (Fraxino excelsioris-Fraxinetum angustifoliae, Carpino orientalis-Pterocaryetum fraxinifoliae, Acero campestris-Alnetum glutinosae) according to CCA ordination. P, Mg, Ca and clay content of soil were found as four significant variables for species composition in the studied forest.