Relationship between the characteristics of the state of Scots pine trees and tree stands in a large industrial city

摘要

The characteristics of the state of individual pine trees and tree stands are analyzed in areas with different levels of urbanization, which are within the urban zone of the city of Yekaterinburg, city parks, and forests outside the city. In the city parks, the state of tree stands does not differ much from the state of forests growing outside the city, but inside the city the timber stock is observed to decrease. Statistical analysis showed this effect to be due to summation of changes in stand density and trees size, and the worsened sanitary tree status, which is reliably due to environmental pollution and recreation, accounts only for a small part of the changes in the timber stock. Mature tree stands are shown to stay resistant to negative environmental impacts for a long time.