The analysis of factors influencing the sustainability of forest stands

The problem of the ecological state of the microclimate of the modern metropolis and surrounding areas is becoming more and more urgent every year due to the increasing anthropogenic impact. This is why it is necessary to conduct a systematic assessment of the state of green spaces in order to design a set of measures to improve their sustainability, preserve biological diversity and improve the environment. The study of tree planting was carried out in an instrumental and visual way. The assessment of natural renewal was carried out on a differentiated scale of the state and quality of natural renewal under the canopy of forest plantations. The purpose of the study was to identify factors that affect the intensity of damage to tree stands, predict the volume of dead trees, and develop an approach to improving the stability of forest stands. As a result, is has been stated that storm damage has mainly affected weak, mature and overmature trees. Root rot (i.e., spruce root rot) promotes high degree of windthrow, while stem rot provokes windbreak (which is typical for hardwood species – aspen, birch, lime tree). The greatest influence on the intensity of damage to plantings by windfall and windbreak has the length of the crown, the diameter of the trunk and the content of rot. Based on the results of the research a new approach of regenerating species composition and the structure of local forest types at the national park has been proposed