Evaluation of the biomass of beetle families in different districts of Volgograd region

The biomass of two groups of beetles was assessed in Volgograd region.All areas under research were different in their environmental conditions. In Kumylzhensky district, biotopes of the mountain oak, in Novonikolaevsky - the floodplain of the Kaldair River, in Chernyshkovsky - sand sections, and in Kalachevsky - steppe sections of the BolshayaGolubaya river valleywere studied. During the study of herpetobiont beetles, 2497 trap-days were conducted, with the help of which 2465 copies of beetles from 20 families were caught. The biomass of all beetlescollected was 460.67 g and the average weight was 0.184 g/trap-day. Arid conditions increase the biomass of ground beetles due to the familyof black teats and plate trees, the maximum biomass is in sandy soils. The base of the complex of ground beetles of the region are representatives of families of tenebrionidae and carabidae, under favorable conditions the predominant families can include scarabaeioidae, cerambycidae, silphidae, histeridae and curculionidae. 114 mowingswere carried out in grasslands and steppe areas to study hortebion beetles. As a result, about 4000 beetles from 29 families were collected. The total biomass was 28.572 g, with the average weight of 2.506 g/ 10 sacks. Arid conditions reduce the mass of herbal beetles due to more sparse vegetation, and as a result, species diversityand the number of beetles decrease. The base of the complex of horthobion beetles of the region are members of the familyof curculionidae, scarabaeioidae, coccinellidae and chrysomelidae. Depending on the type of vegetation, locally, high biomass can have families of cerambycidae, elateridae, cantharidae, oedemeridae, malachidae.