Plant habitats reduction and elimination of the aboriginal species flora populations in the left bank Polissia of Ukraine

Abstract

Catastrophic successions of swamp vegetation as a result of drainage reclamation in the Left Bank Polesia of Ukraine in the middle of the 20th century, as well as modern climate changes, lead to the habitats reduction and populations elimination of native flora species. Populations of rare species were eliminated in the Left Bank Polissia, including Aldrovanda vesiculosa L., Betula humilis Schrank, Botrychium multifidum (S.G. Gmel.) Rupr., B. virginianum (L.) Sw., Cypripedium calceolus L., Drosera intermedia Hayne, D. rotundifolia L., Liparis loeselii (L.) Rich., Ophioglossum vulgatum L., Pulsatilla pratensis (L.) Mill. s.l., Salix myrtilloides L., Saxifraga hirculus L. The reason for the habitats reduction and the populations elimination of the natural plant species is also endoecogenetic natural changes in the vegetation cover. Consequently, the disappearance of habitats and the elimination of populations covered plant species of mesotrophic bogs. Isoёtes lacustris L. and Gladiolus palustris Gaudin probably disappeared in the 20th century. from the flora of the Left Bank Polesia of Ukraine.