Shapoval V. Flora and Vegetation of Depressions of the Left Bank of the Low Dnieper

Dissertation is devoted to the structure of flora and vegetation of Depressions of the Left Bank of the Low Dnieper. The systematic, arealogical, biomorphological and ecological structures of flora have been investigated. 493 species of 256 genera and 64 families of higher vascular plants have been registered in depressed habitats. In horologic organization of the endemic core of flora of depressions of the Left Bank of the Low Dnieper 4 vectors of flora genesis connections are clearly marked. Domination of the neoendemics and progressiveness of endemism of flora of the depressions is function of geological youth of the territory of the Left Bank of the Low Dnieper, development of the Pontic and the local Low Dnieper floristic centres. A project of synthetic subordinate-serial classification of biomorphs is presented. Prodromus and analysis of syntaxonomy of phytocoenoses of depressions of the Left Bank of the Lower Dnieper are given. The syntaxonomy vegetation includes 7 classes, 7 orders, 8 alliances, 3 suballiances, 17 associations, 3 community, 5 subassociations and 4 variants. Syntaxons have been ordinated. Proposals to optimize the state of population of the priority rare plants in flora of the depressions are made.