COMPOSITION AND STRUCTURE of meadows In valley of the Desna river In connection with THEIR ecosystem services
The stock of phytomass in the meadows in the valley of the Desna river (Desniansky Biosphere Reserve; Seredyna-Buda district, Sumy region) were investigated to assess ecosystem services. The gradient of moistening was presented by meadows with prevailing Agrostis vinealis - Poa pratensis - Carex acuta - Glyceria maxima. The supplies of phytomass are presented according to 2,4, 2,2, 2,6 and 4,0 kg per sq. m. The underground phytomass exceeded above-ground on all investigational meadows. Relation between above-ground phytomass and underground is 1: 6,3, 1: 5,0; 1: 2,8 and 1: 3,2. Ecosystem services of meadows in valley of the Desna river were estimated by the Carbone accumulation. Vegetans and dead phytomass accumulated Carbone 4,3, 4,0, 4,7 and 7,4 kg/of м<sup>2</sup> in an equivalent on carbon dioxide.