Based on research conducted between 1995 and 2026, the composition (197 species; 68 % of the fauna of Udmurtia) was established and a comprehensive analysis of the fauna of leaf beetles (Chrysomelidae) was conducted in Izhevsk. A comparison of leaf beetle complexes in different ecological zones of the city and types of biotopes made it possible to identify trends in the transformation of fauna in the urban environment. In the residential zone, given the highly mosaic environment and the preservation of remnant natural biotopes, the species richness of leaf beetles is only slightly lower than in the city’s green zone (155 versus 182 species). A significant depletion and transformation of leaf beetle complexes (a significant increase in the proportion of ruderal and eurybiont species, as well as the adventitious component of the fauna) are observed in typical urban areas. Almost all adventitious species (16 out of 17) are near-field invaders, having entered the city from the major river valleys of the republic’s south or the Trans-Volga forest-steppe zone. The Colorado potato beetle – Leptinotarsa decemlineata (Say, 1824) is an invader from remote regions.
Dedyukhin S.V.
