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Purpose: to study the species composition of groups of predatory beetles in beech forests of the lower forest belt of the Gorgan massif and their ecological features. Materials and methods. Representatives of 54 species from 12 subfamilies. Identification of the reveal species was performed using Bay-Bienko (1965), Bоhас J (1985 a, b), Coiffait, H., (1974, 1984), Lohse, G. A., (1964, 1974) determinants. Determination of dominance groups by the Stecker-Bergman method (1977), establishment of ecological and morphological groups according to Kashcheev V. A. (1982, 1985, 1999), types of life strategies according to Planck's method, Belonging to zoogeographical groups was established by the Vtorov P. P., Drozdov N. N. (2001). Research results. According to the results of the research, 556 individuals of rove beetles belonging to 28 genera were found, which are located within 12 subfamilies. The highest level of species diversity is characterized by the subfamilies Staphylininae and Tachyporinae, which are represented by 21 and 13 species, respectively. Only one dominant species was found in the structure of dominance - Tasgius (Rayacheila) bicharicus Mull., 1825, however, a high number of subrecent species is observed. The identified species are representatives of eleven ecological and morphological groups. Analysis of the trophic specialization of predatory beetles has shown a clear dominance of predators, among which there are both specialized species and polyphagous. The analysis of life strategies revealed representatives of 7 groups, and zoogeographical features - 10. Conclusions. Among the species of predatory beetles caught, there is a clear dominance of tachyporin and staphylin, which total 62.9 % The study of the dominance structure of this group showed a small proportion of mass species, and a clear redominance of recedents and subrecedents. According to the analysis of ecomorphs, there is an increase in the number of wells and cryptobionts, as well as mixotrophs, due to the significant level of ecological niches that are inherent in the analyzed type of ecosystems Author Biographies Marіana Lutskа, State Higher Educational Institution “Vasyl Stefanyk Precarpathian National University” Shevchenkа str., 57, Ivano-Frankivsk, Ukraine, 76018 Postgraduate Student Department of Biology and Ecology

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