Borsukevych L. The higher aquatic vegetation from the basin of headwaters of Dniester, Prut and Zakhidny Bug.

The work is devoted to the modern condition of higher aquatic vegetation, its syntaxonomy, dynamics and protection. Comparative-structural analysis of the flora which is represented by 143 species of higher vascular plants was conducted. Systematical, geographical, biomorphological, ecological and coenotical structures of flora were studied. The features of distribution in the region were ascertained. Two new for the flora of Ukraine species: Groenlandia densa (L.) Fourr. and Tolypella intricata (Roth) Leonh. have been found. The presence of Glyceria declinata Br?b in the flora of Ukraine has been confirmed. The prodromus of higher aquatic vegetation, which includes 4 classes, 8 orders, 16 alliances, 73 associations and 2 communities, was created. Basic directions and tendencies of vegetable cover changes in reservoirs were determined. The leading role of anthropogenic factors was detected in forming of vegetable cover in modern terms. The sozological estimation of aquatic flora and vegetation has been carried out. It had been found out of 48 species and 15 syntaxones, which need the protection. 43 species and 8 syntaxones are offered for a protection at regional level. The scientific basis for the creation of 11 new protected areas and 2 new Ramsar's areas was described. The methods of optimization of vegetable cover have been developed and the project of regional ecological network for the investigated territory has been created.