Diversity and distribution of naked amoebae in water bodies of Sumy region (Ukraine)

Taxonomy of naked amoebae and specifi cs of their distribution in water bodies of Sumy Region are presented. Our research identifi ed 12 species of naked amoebae of 11 morphotypes. We established their ecological groups relative to abiotic aquatic factors: euryoxidic, stenooxidic, stenobiotic and those that survive in a wide range of organic matter content. According to the species composition, swamp and riparian species complexes of naked amoebae were identifi ed. It was found that species complexes of amoeba are infl uenced by such factors as temperature, concentration of dissolved oxygen and organic compounds

Above-ground phytomass dynamics in autogenic succession of an ecosystem

It was found that a regular growth in the above-ground phytomass occurs during autogenic succession, which is approximated by logarithmic dependence with high reliability indices. External, including anthropogenic, effects on the process of succession lead to a decrease in the rate of phytomass growth. Besides, the rate of phytomass changes is influenced by endo-ecogenesis caused by various plant species, entering the ecosystem at certain stages of succession. The above-ground phytomass portioning behaviour makes it possible to use it to create a unified indicator of dynamics. Each plant species can be only within certain indicators of the phytomass of their plant communities. At the same time, there is a normal distribution of the projective cover value. This allows us to work out synphytoindication methods for determining the dynamics indicato