DETERMINATION OF THE MAIN INDICATORS OF SPECIES DIVERSITY IN "DREVLYANSKY" NATURE RESERVE'S FORESTS

The high level of natural ecosystems’ biodiversity is the key to their sustainability. Conservation of species diversity is one of the key tasks of nature reserves. Achieving of this goal is impossible without high quality of monitoring. The results of species diversity monitoring of higher vascular plants of forest ecosystems with the type of habitat conditions – boreal forests, Drevlyansky Nature Reserve are presented in this article. 12 quarters of Narodytskyi and Rozsokhivskyi nature protection research departments of the Drevlyanskyi Nature Reserve were studied. According to the results of research, the species composition of higher vascular plants of boreal forests vegetation conditions were determined. A total of 26 species belonging to 17 families were identified, 24 genera, among which the most numerous are the families of heather, thin-legged, pink, bean, deaf nettle, bellflower and birch, characteristic of the forests of Narodytsky and Rozsokhiv NSD. Numerical accountings were performed, on the basis of which the dominant specie was determined – cranberry (Vaccinium vitis-idaea L.), the dominance index of which is 0.457. The general Margalef species diversity index, which is 2.85, the Simpson index – 0.741, the Shannon index – 1.72 and the equivalence index (Piel) – 05.84 for the studied forests. Certain indicators indicate low stability of these areas with the type of habitat conditions – boreal forests. Therefore, the prospect for further research is to continue monitoring of these areas, given their vulnerability and to study the patterns of dynamics of plant populations and develop measures to improve the effectiveness of measures to preserve species diversity in the nature reserve "Drevlyansky"