Discovery of the features and regulations of the process of natural regeneration of forests on the basis of the construction of phytocenotic pyramids

Abstract

Studies were conducted on the territories of the Left Bank Polissia, which aimed to assess the state and find out the peculiarities and patterns of natural seed regeneration of the leading forest-forming species of the Left Bank Polissia of Ukraine – Pinus sylvestris L., Quercus robur L., Acer platanoides L., Betula pendula Roth., Populus tremula L. as a mechanism for ensuring the preservation and functioning of forest phytocoenoses of this region. Phytocoenoses of 24 groups of associations representing forest communities typical for the region were covered by the study. The studies were carried out based on the original system of the division of woody plant populations into intrapopulation structural groups - cohorts. Considering the established facts regarding the prevalence of cohorts in the phytocoenoses of the Left Bank Polissia of Ukraine, a special method of building phytocoenotic pyramids of natural restoration was developed. According to the results of the analysis of the condition and signs of phytocenotic pyramids, it is shown that the natural regeneration of each of the forest-forming species within the areas of the Left Bank Polissia of Ukraine has its own specific features signs of formation, distribution of cohorts and their transition from tier to tier of forest phytocoenoses. Although all these species are characterized by a tendency to decrease the prevalence of cohorts in the range small undergrowth medium large.