Characteristics of lighting parameters and its interception by the crowns of Cotoneaster lucidus Schlecht. bushes in forest parks of Yekaterinburg

Abstract

Cotoneaster lucidus Schlecht. distributed in twelve of fifteen forest parks in Yekaterinburg on an area of 396.8 hectares. The lighting parameters in different parts of the crown of pregenerative individuals of cotoneaster in the Karasye-Ozersky and Malo-Istoksky forest parks, as well as the ability to intercept light, were studied. The percentage of light interception by the entire crown is 41% and 51% for cotoneaster habitats, respectively. The average heights (H) and the minimum and maximum diameters of bush crowns (Dmin, Dmax) in the two habitats do not differ significantly. The parameters of illumination and its interception by different parts of the crown have their own characteristics for the two samples. There are no correlations between the measured heights and crown diameters of bushes and the considered lighting parameters. The initial illumination above the crowns of the bushes for the habitat in the Malo-Istoksky forest park has low values compared to the Karasye- Ozersky forest park, apparently this is a consequence of shading of the bushes. Differences in incoming illumination caused differences in the structure of correlations between the parameters of its interception. For the habitat in the Malo-Istoksky Forest Park, all correlations are high positive, while in the Karasye-Ozersky Forest Park some correlations are absent, and some are negative correlations. Other features of interception of illumination by the crowns of cotoneaster bushes were noted.