Assessment of the condition of pine stands in the urban forests of the city of Tyumen (on the example of the park “Gilevskaya Roshcha”)

The purpose of the work is to develop proposals for the preservation of unique pine plantations growing in the Gilevskaya Roshcha Park based on the analysis of their current state. The data of the analysis of the current state of pine stands in the park “Gilyovskaya Roshcha” of the city of Tyumen, obtained taking into account the sanitary condition, the presence of damage to trees and their relative vital condition, are presented. According to the analyzed indicators, the condition of pine forests on all temporary sample plots is assessed as weakened. Data have been obtained that increased recreational impact leads to a decrease in the number of healthy trees and an increase in the proportion of severely weakened and dying trees. The smallest diameters and volume indicators are characterized by severely weakened and drying trees. It has been established that mechanical damage, as well as tar flow, are most common in trees. The dependence of a threefold increase in mechanical damage on tree trunks growing in the zone of active visits compared to the zone of low visits was recorded. The decrease in the vital condition of pine stands in the Gilevskaya Roshcha Park is significantly influenced by the age by which the stands are characterized as overmature. This process is aggravated by the fact of long-term use of these plantations for recreation purposes – more than 50 years. To prevent the degradation of plantations in the Gilev Roshcha Park, as well as to increase the stability of pine forests, a number of forestry measures have been proposed, in particular, the removal of weakened trees lagging behind in the growth of potential falloff, as well as damaged, emergency and aesthetically unattractive trees in the process of landscape felling. The use of tree introductions for the expansion of biological diversity and the implementation of measures to limit the movement of recreationists, in particular, the creation of plantings of shrubs along the path network, deserve attention.

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