Ecological and phytocenotic characteristics of Convallaria majalis L. (Asparagaceae Juss.) habitat in the Leningrad region

This study presents the results of phytoindication of plant communities with lily of the valley ( Convallaria majalis L.) on the basis of D.N. Tsyganov's range ecological scales, supplemented by agrochemical parameters of soils. There are two types of associations ( Pinetum herboso-convallariosum and Festuceto pratensis-Dactyletum glomeratae ) in which the yield of the aboveground phytomass of the lily of the valley is maximal. A strong positive relationship was found between the pH value and the yield of C. majalis . Clustering of phytocenoses by species composition and ordination by edapho-climatic factors was carried out. The values of potential and realized ecological niches for 10 abiotic factors and the index of tolerance to their combinations in each ecotope were determined, on the basis of which a conclusion was made about the mesobiontness of the lily of the valley in natural phytocenoses in the Leningrad Region.