Ecology

Species composition of microorganisms of the trophic chain: Cereal plants – aphids

The article is devoted to the study of the species composition of microorganisms of the trophic chain: cereal plants – aphids. The objectives of the study were to determine the species composition, occurrence index and quantitative indicators of associative microorganisms of rye plants of the “Marusenka” variety and common grass aphids. The work was carried out on the basis of the Department of Microbiology and Plant Physiology of N. G. Chernyshevsky SSU.

Accumulation of heavy metals and arsenic with medicinal herbal raw material of common shovel harvested in Voronezh region

Authors: Dyakova N. A.

The Voronezh region is traditionally the most important area of crop production and agriculture. The purpose of the research was to study the contamination with heavy metals of medicinal plant raw materials of the Voronezh region using the example of the roots of ordinary burdock, prepared in urbo- and agro-ecosystems, which have various anthropogenic effects on themselves. The accumulation of heavy metals (lead, mercury, cadmium, nickel, copper, zinc, cobalt, chromium) and arsenic in 51 samples of raw materials was studied.

мChange of Ecological and Biological Properties of Light Brown Soils of Kalmykia at Oil Pollution

Authors: Buluktaev А. А., Sangadzhieva L. K., Davaeva T. D.

Change of ecological and biological properties of light brown soils of Kalmykia at oil pollution is investigated. Negative influence of oil pollution on biological properties of light brown soils is studied. Influence of oil pollution on body height and development of plants is studied. Oil negatively influences such indicators of plants as the root length, the stalk length, the quantity of the sprouted plants, they decrease. It is proved that oil pollution of the light brown soil leads to change of physical and chemical properties of soils.

Еcological Complexes of Beetles (Insecta: Coleoptera) Coastal Area of Floodplain Lakes of Medveditsa River (Saratov Area)

Authors: Anikin V. V., Nazimova A. A., Sazhnev A. S.

The article contains the results of the coastal beetles research (floodplain lakes of Medveditsa river Lysogorsky district Saratov region). There is also a brief description of the investigated biotope. List of 68 species of beetles is presented. The representatives of investigated set of beetles are divided into ecological groups, humid gradient and food chains.

Macrozoobenthos Communities from Floodplain Lakes of the Volga River Valley (Saratov Region)

Authors: Djomina I. V., Ermokhin M. V., Polukonova N. V.

Macrozoobenthos from lakes of the Volga River valley were consists 99 species of hydrobionts (including 80 species of heterotopic insects). The greatest number of communities were determined in the lake Sazanka (in spring – 8, in summer – 5, in autumn – winter period – 9). Community Glyptotendipes glaucus, Polypedilum nubeculosum and Oligochaeta were prevailed during the year. Benthos other lakes include the least quantity of communities: Holodnoe lake – 3; Lenivoe lake – 1; Sadok lake – 1.

Ecological and cenotic characteristics of Colchicum laetum (Colchicaceae) habitats in the Volgograd region

Authors: Shushunov V. A., Shilova I. V., Parhomenko A. S., Kashin A. S.

During the flowering period of Colchicum laetum Stephen (September 16–19, 2020), seven habitats were studied in the Volgograd region. C. laetum occurs on small (0.006–4 ha) unploughed areas of the steppes adjacent to gullies. In the community, 28 species of vascular plants were recorded, including C. laetum, only 10 species vegetated (from 2 to 7 in the community): Artemisia austriaca Jacq., A. santonicum L., Bassia prostrata (L.) Beck, Cynanchum acutum L., Dianthus polymorphus M. Bieb., Euphorbia seguieriana Neck., E.

Spatial-ontogenetic structure of Globularia bisnagarica L. (Plantaginaceae) cenopopulations

Authors: Kondrateva A. O., Parhomenko A. S., Kashin A. S.

The results of studying the spatial-ontogenetic structure of five cenopopulations of Globularia bisnagarica L. on the territory of the Orenburg region and the Republic of Tatarstan are presented. Analysis of the age structure using the OntoParam program algorithm revealed the heterogeneity of ontogenetic spectra in most cenopopulations. Assessment of the parameters of average age, recovery index and ageing index showed that most cenopopulations are capable of self-restoration and maintenance of numerosity.

Dynamics of the demographic structure and variability of some morphological parameters of Calophaca wolgarica (Fabaceae) during reintroduction to the Saratov region

Authors: Denisov A. A., Parhomenko A. S., Shilova I. V., Grebenyuk L. V., Kashin A. S.

Preliminary results of studies on the reintroduction of Calophaca wolgarica to the territory of the Saratov region are presented. In the period from 2018 to 2020, the age structure of artificial plantings and changes in the morphological parameters of individuals within them were studied. It is shown that on the territory of the Saratov region, artificial plantings of this species are best located near the protected area “Tulip Steppe near the village of Maksyutovo”.

Morphological variability and state of Delphinium pubiflorum (Ranunculaceae) populations in the Saratov region

Authors: Bogoslov A. V., Kashin A. S., Shilova I. V., Parhomenko A. S., Grebenyuk L. V.

The article presents the results of studying the morphological state of three populations of Delphinium pubiflorum on the basis of quantitative traits measured over four years during the period of mass flowering of plants. The greatest difference in quantitative characteristics was shown by the populations from the Krasnoarmeisky and Tatishchevsky districts of the Saratov region.

Features of cultivation of the deadhead hawk moth Acherontia atropos (Linnaeus, 1758) on artificial nutrient media

Authors: Leontiev I. S.

The results of testing of the method of cultivation of the deadhead hawk moth Acherontia atropos (Linnaeus, 1758) using solid culture medium are given in this article. Optimal cultivation conditions for all caterpillar stages of this species are discussed. Information about bacterial infection of caterpillars which is caused by Gram-negative rod-shaped bacterial flora, is also noted in the results. Methods of treatment of this bacterial infection were selected empirically and also given use of bactericidal antibiotics (ceftriaxone) and selenopiran.

Ecology

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