Influence of aquatic environmental factors on the distribution of naked amoebae in waters of Zhytomyr region (Ukraine)

Abstract

In the reservoirs of Zhytomyr region we have identified 26 species of naked amoebae. The most common amoebae were Mayorella cantabrigiensis, Korotnevella stella, Vannella lata, Cochliopodium actinophorum; the average position in terms of frequency of occurrence is occupied by species Saccamoeba stagnicola, Thecamoeba striata, Stenamoeba stenopodia, Mayorella vespertilioides, Vexillifera bacillipedes, Vannella sp., Vahlkampfia sp. (4); the least common – Rhizamoeba sp. (1), Deuteramoeba mycophaga, Saccamoeba sp. (1), Saccamoeba sp. (3), Thecamoeba quadrilineata, Thecamoeba verrucosa, Thecamoeba terricola, Thecamoeba sp., Paradermamoeba valamo, Paradermamoeba levis, Korotne­vella diskophora, Ripella sp., Acanthamoeba sp., Flamella sp., Willaertia magna. Steno­xidic species include K. diskophora, T. terricola, T. quadrilineata, and eurioxidic species include Rhizamoeba sp. (1), D. mycophaga, S. stagnicola, Saccamoeba sp. (1), Saccamoeba sp. (3), T. striata, T. verrucosa, Thecamoeba sp., S. stenopodia, P. valamo, P. levis, M. cantabrigiensis, M. vespertilioides, K. stella, V. bacillipedes, Ripella sp., V. lata, Vannella sp., Acantha­moeba sp., C. actinophorum, Flamella sp., Vahlkampfia sp. (4), W. magna. High levels of concentration of dissolved organic substances in water Rhizamoeba sp. (1), D. mycophaga, S. stagnicola, T. striata, T. quadrilineata, S. stenopodia, P. valamo, P. levis, M. cantabrigiensis, M. vespertilioides, K. stella, K. diskophora, V. bacillipedes, Ripella sp., V. lata, Vannella sp., Acanthamoeba sp., C. actinophorum, Vahlkampfia sp. (4)., sensitive to this factor was Saccamoeba sp. (1); Saccamoeba sp. (3), T. verrucosa, T. terricola, Thecamoeba sp., Flamella sp., W. magna belong to stenobiontic species in relation to organic substances dissolved in water. Polytactic, monotactic, flamellian, lens-like, striate, rugose, lingulate, lanceolate, fan-shaped, mayorellian, dactylopodial, acanthopodial, branched, eruptive morphotypes of amoebae have been identified. Morphotypes of amoebae withstand similar values of hydrophysical and hydrochemical factors of the aquatic environment with such amoebae.