Abstract
<span>Oil pollution negatively impacts not only the physicochemical and morpho-genetic parameters of soils but also the vital activity of soil biota-microorganisms and invertebrates. Studies have established that in the uncontaminated gray-brown soil of the Binagadi and Karadag massifs, the bulk of the invertebrate complex is gastropoda, insecta, tenebrionidae, and carabidae. In lightly oil-polluted biotopes, insecta, gastropoda, lithobiidae, tenebrionidae, carabidae, buprestidae, and woodlice of the genus hemilepstus occupy the leading place. The total number and biomass of invertebrates in uncontaminated biotopes of gray-brown soils of the Binagadi and Karadag massifs is 19.2 ind/m<sup>2</sup>, respectively; 26 gr/m<sup>2</sup> and 20 ind/m<sup>2</sup>; 3.64 gr/m<sup>2</sup>. In slightly oil-contaminated biotopes, these indicators vary between 25.6 ind/m<sup>2</sup>, respectively; 3.5 gr/m<sup>2</sup> and 12.8 ind/m<sup>2</sup>; 0.84 gr/m<sup>2</sup>. The energy accumulated in the mesofauna biomass in the slightly oil-polluted biotopes of the Karadag and Binagadi massif varies between 0.3268 gr/m<sup>2</sup>-1418.94 cal/m<sup>2</sup> and 1.0468 gr/m<sup>2</sup>-5072.20 cal/m<sup>2</sup>, respectively. Thus, the reliability of the biogeocenoses is determined by the level and effective activity of soil organisms.</span>
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