Analysis of ecofloristic diversity of the Poaceae family of forest biogeocenoses of the northern steppe Prydniprovya

It is difficult to overestimate the importance of cereals in functioning natural ecosystems and their use for human life. They often play role dominants edifiers composition plant cover, primarily herbaceous types vegetation. But they also take part forest phytocenoses different zones. Within Ukraine, Poaceae family includes 71 genera (of which only 4 are culture) 208 species 15 [20]. The cereal flora biogeocenoses analyzed area was studied end 19th century [1]. Since complexes located within steppe zone with various conditions watershed-beam valley-terrace landscapes, contain ecomorphs: from xerophytes hygrophytes (or even helophytes); heliophytes sciophytes, oligotrophs megatrophs. northern Prydniprovya region 73 vascular plants. greatest richness belongs floodplain forests, confirms statement about extraordinary biodiversity landscapes [35]. Of entire biogeocenoses, hemicryptophytes (42 species) predominate among climamorphs, (66 heliomorphs, mesotrophs (39 trophomorphs, mesophytes (45 hygromorphs. Among coenomorphs, majority forest-meadow (55 ruderal-forest (18 species). Roaceae 6 rare that included regional red list plants [29]. ecomorphic analysis peculiarities physical geographical forests. birachous wall characteristic arenaceous sciophytes megatrophs walled arena largest number characterized by significant anthropogenic transformation vegetation cover. In flora, there 16 purely ruderal (weedy) species, 23 mixed ecomorphs. them, adventive species. assessment cover using hemerobium method shows belong mesohemerobes – grow on territories a medium degree transformation. This indicates moderate Prydniprovya. all least transformed floodplain, ravine