Yakutin M.V.1, Andrievskii V.S.1, Anopchenko L.Yu.2 2017. [Peculiarities of parallel successions of microorganisms and oribatid mites (Acari: Oribatida) in the early stages of soil formation on saline substrates in the forest-steppe zone of Western Siberia] // Euroasian Entomological Journal. Vol. 16. No. 5: 470–475 [in Russian, with English summary].

1 Institute of Soil Sciences and Agrochemistry, Russian Academy of Sciences, Siberian Branch, Academika Lavrenteva Prosp. 8/2, Novosibirsk 630090 Russia.

2 Siberian State Geosystems and Technology University, Plakhotnogo Str. 10, Novosibirsk 630108 Russia.

E-mail: VS@issa.nsc.ru, yakutin@issa.nsc.ru, milaa2006@ngs.ru

doi: 10.15298/euroasentj.16.5.08

ABSTRACT. The several stages in the formation of decomposers complex during the process of development of soils on the plots of the dried bottom of the saline lake  in the forest-steppe zone of Western Siberia can be distinguished. After desiccation of the lake bottom is relatively small microbiomass lake silt has a high total and specific metabolic activity. At the next stage — of meadow salt marshes - the stocks of microbial biomass increases by relatively slow rate, but there is a sharp decrease in total and specific metabolic activity of soil microbocenosis. At the first two stages of development with a high level of salinity prevents the colonization of soil by oribatid mites, so the process of decomposition of litter is carried out exclusively by microorganisms. At the stage of meadow soils the process of desalinization of the soil profile begins, significantly increase the microbial biomass and basal respiration and appear oribatid mites, which form a multi-species group with still relatively low abundance. It is at this stage of succession we can talk about the beginning of zoo-microbial complex formation. The dominance structure of the population of oribatid mites in the meadow saline soil is characteristic for disturbed ecosystems when in the communities prevails the small number of species that have high values of specific abundance.

KEY WORDS: Western Siberia, forest-steppe zone, first stages of succession, salt affected soils, microbiomass, basal respiration, metabolic coefficient, oribatid mites abundance, species richness, destruction block.

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