The authors justify creation of an ecological network in the Forest-Steppe zone of Ukraine. For this region, it is proposed to allocate 52 key areas at the national level and 78 key areas at the regional level. Their general characteristics by typological and coenotic features and quantitative composition of rare groups are provided. According to the research, the main threats to rare phytocenoses on the selected key areas of the region were identified. These threats were divided into three groups: physical destruction, environmental changes and pollution. In the first group the leading factors are cutting, afforestation, overgrazing, fires and purposeful burning, plowing, quarrying, recreation and urbanization; in the second group – fragmentation of ecotypes and modification of habitats; in the third group – biological and municipal pollution. There are also threats of natural character. The article presents examples of their impact on rare plant communities (phytocenoses). It is concluded that implementation of the ecological network can minimize threats to the rare phytocenoses and contribute to natural processes of their recovery and stabilization.

Keywords: ecological network, key area, rare phytocenoses, threats, Forest-Steppe

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