Розподіл голих амеб у грунтах України

In soils, the existence of organisms depends on humidity, temperature, acidity, and soil types. Naked amoebae are more adaptable to living in the thin water film that surrounds soil particles. These protists form resting stages (cysts), which allows them to survive adverse environmental conditions. The distribution of naked amoebae in terrestrial biotopes on a regional scale has not previously been studied. 23 species of naked amoebae were identified in Ukrainian soils: Rhizamoeba sp. (1), Polychaos dubium, Deuteramoeba mycophaga, Saccamoeba stagnicola, Saccamoeba sp. (1), Thecamoeba striata, Thecamoeba terricola, Thecamoeba similis, Stenamoeba stenopodia, Mayorella cantabrigiensis, Mayorella vespertilioides, Mayorella viridis, Mayorella sp. (1), Korotnevella stella, Vexillifera bacillipedes, Ripella platypodia, Vannella lata, Vannella sp., Acanthamoeba sp., Cochliopodium actinophorum, Vahlkampfia sp. (2), Vahlkampfia avara, Willaertia magna. The following groups of naked amoebae are distinguished by their frequency of occurrence: rare (9 species), most common (11 species), and those that occupy an average position in terms of frequency of occurrence (3 species). Ecological groups of naked amoebae are distinguished in relation to temperature, acidity and soil moisture: thermophilic (15 species), psychrophilic (2 species), mesophilic (6 species); neutrophils (22 species), acidophiles (1 species); hygrophilic (15 species), mesophilic (8 species). Naked amoebae in the soils of Ukraine form two species complexes: the first complex is characteristic of the Lviv region, the second – for the Odessa, Kyiv, Khmelnytskyi, Vinnytsia, Rivne, Sumy, Kharkiv, Zhytomyr, Kirovohrad and Mykolaiv regions. The faunal similarity index Ics is relatively high between all regions of Ukraine (from 43 to 97%), except for Lviv region. The faunal similarity index Ics between Lviv region and other regions of Ukraine ranges from 0.14 to 0.38.