Ecosystems of Ukraine with regard to value of water resource potential

It is stated that revaluation of nature-resource potential (NRP) of Ukrainian ecosystems conducted as of 01.01.2022 on the unified methodological basis with regard to averaged for the last five-seven years measures of productivity of nature resources in monetary terms serves as the reference source to help define those ecosystems (from the level of natural rayon to the level of biome-natural zone and country) where their water wealth is the first (dominant) or the second (subdominant) type of nature resources in the structure of the whole potential. It should be noted from the outset that within the component structure of Ukraine’s natural resource potential, water resources rank third (after land and mineral resources) in terms of potential magnitude. It is argued that such ranking of nature resources is essentially important not only for the typology of ecosystems and their classification but for scientific substantiation of the perspectives of their subsequent sustainable development within regional and national economics. It is ascertained that, among 360 ecosystems of Ukraine (from the level of 278 natural areas, 57 oblast-level ecosystems, 14 provincial ecosystems, 3 subzones, and 4 biomes-natural zones to the level of 3 natural countries) 28 of them enjoy water resources as their first (dominant) type of nature resources, and 181 ecosystems possess the same as their second (subdominant) type with regard to absolute value of their potential within the total NRP. The above respectively makes 7.8% and 50.3% out of the whole number of Ukrainian ecosystems. It is proved that the potential of water resources in 3/5 of all ecosystems of Ukraine takes leading positions in the structure of natural productive forces, that is, takes the first or the second place. Thus, it is in these ecosystems that the potential of water resources is a determinative or essential factor in substantiation of the perspectives of sustainable social-ecological-economic development of nature use. The share of water resources as NRP’s dominant type is found to be the least in the oblastlevel ecosystems, i.e., in the External Carpathian Oblast (37,5%) and the Polonynsko-Chornohirska Oblast (37.5%), while the biggest role of the potential of water resources is observed in the VododilnoVerkhovynska Oblast (46.1%) and the Marmaros Oblast (45.8%). It is verified that the most distinguished ecosystems among those where the role of water resources in the total NRP is subdominant are as follows: on the level of biomes-natural zones: the Forest-Steppe Zone (11.7%), the Broadleaved Woods Zone (14.7%), and the Mixed Woods Zone (20.2%); on the level of subzones: the Mid-Steppe Subzone (17.3%) and the Southern Steppe Subzone (25.7%); on the level of oblasts: the Prysyvasko-Crimean Lowland Oblast (35.9%), the Lower Bug-Dnieper Lowland Oblast (34.5%), the Central-Crimean Upland Oblast (29.6%), and the Dnieper-Molochansk Lowland Oblast (26.7%) (intense irrigation farming in all the above oblasts). The lowest figures of the share of subdominant water resources within the total NRP are observed in three oblast-level ecosystems of the biome of the Forest-Steppe Zone: the Northern Poltava Upland Oblast (10,9%), the North-EasternPrydniprovska Upland Oblast (9.2%), and the Prydnistrovsko-Eastern-Podillia Upland Oblast (6.9%).