Scientific publications

Estimation of ecological conditions enables to define the potential development of phytocenosises, to reveal leading ecological factors stipulating for the structure of phytocenosises, to order plant communities in the investigated territory. Our research work took place in the south-west part of Solomenskaya ridge (the North shore of Petrozavodskaja bay). Rugged relief and the presents of different elements of geological structure causes the diversity of ecotopes. The vegetation is presented by coniferous forests with Pinus sylvestris L. and Picea abies Karst. as the dominants. In some plots Tilia cordata Mill. and Alnus glutinosa (L.) Gaertn. were found. The objects of our investigations were forest phytocenosises of two catena complexes which differ from each other by ecotops composition. The description of 100 sample plots was made. The data was worked up according to ecological scales of the vegetation (Tsiganov, 1983). The range of forest phytocenosyses in the scales of 10 ecological factors was detected. For instance, in thermoclimatic scale investigated phytocenosyses occupy the range from 7.02 to 8.0 points on the scale which corresponds to subboreal climatic type and intermediate type between subboreal and nemoral climate. In the scale of soil moisture - between dryforest-meadow type and dampforest-meadow type (11.95-14.60). In the soil acidity scale - from acid to less acid soil types (5.16-6.83). In the scale of illumination - from half-open type to the intermediate type between light and shady forest types (3.10-5.18). In the scale of nitrogen contents of soils - the versions of poor soils (4.26-5.84). The regions of locations of several forest types in the space of ecological factors also were detected. Therefore the succession processes in forest phytocenosises on the investigated territory may be predicted.