Due to rapid spread and naturalization of Amorpha fruticosa in natural plant communities in the Middle Dnipro region, the phytocoenotic range of this invasive species was studied. This is necessary in order to predict its behavior, to identify the most vulnerable biotopes in relation to possible invasions of this species, and to prevent their negative consequences, in particular, transformation of the regionally important natural biotopes. Analysis of 120 geobotanical relevés of plants associations from the studied region that include Amorpha fruticosa was performed. These cenopopulations belong to 4 classes, 5 orders, 7 unions, 7 associations, and a single community of unidentified syntaxonomical status within Dicrano-Pinion union. Phragmition communis + Magnocaricion elatae + Molinatealia – Rubo caesi-Amorphion fruticosae – Salicion albae form the central part in the vegetation of this area. The outermost zone of the phytocoenotic range for Amorpha fruticosa in the floodplain is a xeromezophilous demutational succession series represented by the following syntaxonomical aggregations: Galietalia veri – Artemisio dniproicae-Salicion acutifoliae – Dicrano-Pinion. In these floodplain phytocenoses, Amorpha fruticosa is capable of regular reproduction of populations due to the presence of individuals of the juvenile age group in the herbaceous layer. Occurrence of Amorpha fruticosa in the communities of the classes Robinietea and Carpino-Fagetea can be regarded mostly as a residual effect of the use of this shrub in forestry. In these populations of Amorpha fruticosa almost no individuals of the juvenile age exist and therefore there is no prospect of an extended recovery in such biotopes.

Keywords: Amorpha fruticosa, Dnipro floodplain, ecological succession, invasive species, Phragmito-Magnocaricetea, Robinietea, Salicetea purpurea, Vaccinio-Piceetea

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