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Abstract
The parameters of the undergrowth in the forbs and berry groups of pine forest types in 9 parks in Yekaterinburg and areas of natural forest have been investigated. Data on the species composition, density, and distribution by groups of heights of plants that make up the undergrowth collected. It has been established that the transformation of the undergrowth by an urbanized environment neutralizes the influence of the growing conditions of the considered forest types on it. In the forest-park zone, an increase in the density of the undergrowth is observed in comparison with the natural forest. The specificity of the forest park undergrowth is the floristic contamination with adventive species, the number of which is close to 50% of the total number of undergrowth species. The coefficient of floristic similarity of the undergrowth, according to the Sorensen coefficient between forest parks and a site of natural forest, was 0.26-0.46. In quantitative terms, the self-seeding of adventive species in the undergrowth is less than that of native plants. The invasive activity of ash-leaved maple in city parks and its dynamics over a 10-year period are considered, using the example of one of the parks.
Highlights
A brief definition of undergrowth is given by GOST: "Undergrowth includes shrubs, less often trees growing under the forest canopy and unable to form stands in specific growing conditions." [1]
The studies were carried out in pine plantations of forest parks and green zones in the forb and berry groups of forest types in order to assess the parameters of the undergrowth of forest ecosystems transformed by the urbanized environment of Yekaterinburg
59 sample plots (SP) were laid with varying degrees of recreational degression in 10 forest areas, including two of them remote from the city, but under the influence of anthropogenic impact, and one can be considered as control
Summary
The objective of the study was to assess the parameters of the undergrowth in forest parks, their possible changes under the influence of the urbanized environment, the inclusion of adventive species in the undergrowth and the possibility of replacing them with native species. Statistically significant differences are observed at p
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