Abstract
Invasive species are species that are not native to a particular ecosystem. The introduction and spread of invasive species of plants and animals into new ecosystems pose a serious threat to biodiversity, disrupting natural ecological relationships and leading to a decrease in the number of native species. Kazakhstan, known for its rich biodiversity, faces the growing problem of the spread of alien organisms, among which Ash-Leaved Maple (Acer negundo L.) and Common myna (Acridotheres tristis L.) play a key role in transforming ecosystems and degrading natural habitats. This study aims to analyze the impact of invasive species on the biodiversity of Kazakhstan, to test the hypothesis about the reduction of the number and species composition of local flora and fauna, and to develop scientifically based recommendations for controlling and minimizing the consequences of invasions. The work uses methods of field observations, comparative analysis, statistical modeling and data from environmental organizations. The results of the study can contribute to the development of a strategy for the management of invasive species, including the development of the “Black book of the Republic of Kazakhstan", containing relevant information on the most dangerous invasions and measures to combat them. The obtained conclusions are of significant importance for the preservation of ecosystem balance, prevention of ecological crises, development of effective environmental protection measures and maintenance of sustainable biodiversity of the region.