CONTENT AND STRUCTURE OF ENTOMOPHAUNA OF GREEN PLANTING IN URBAN AREAS

The paper highlights the results of long-term studies of insect of protective forest plantations and landscaping of common use in small towns of Volgograd region. This problem is considered to be important and relevant due to regional environmental conditions and insufficient studying. Green plantings of different functional purposes are seen as new biocenoses with high buffer capacity. These biocenoses combine introduced wood plants and aboriginal ones; and natural factors are combined with the features of anthropogenic influence. The most important component of these biocenoses is entomofauna. The paper aims at exploring the diversity of insects in green spaces of different categories, specifying their typical species, analyzing communities and showing the number of significant differences among them. The authors highlight direct relation between quantitative abundance and the structure of the insect population and the type/category, range, design parameters and age of plantings, microclimate conditions and soil acidity. The species diversity and density of harmful insects in protective forest plantings is much higher than in recreational and landscaping plantings. The authors found out that among the forest strips of different design parameters, higher number of pests is typical for narrow (2-3 rows) plantings of the blown structure, which indicates faster weakening and less resistance of trees in comparison with multi-row (6-10 rows) dense plantings. The most important leaf-eating pests inhabit mainly on the trees of the edge rows of protective plantings, while dangerous needle-eating insects inhabit mainly on the trees inside the plantings. The authors found out that species and quantitative abundance of stem pests in hardwoods depend on the range and design parameters; species and quantitative abundance of stem pests in coniferous plantings depend on the density of growing stock and plot microrelief . The obtained data can be used in forest management and environmental monitoring of green plantings.

categories of green planting, natural ones, environmental conditions, diversity, dendroinsects, entomophages

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