Ciliofauna Species Wealth of the Khabarovsk Central City Pond

The paper describes the composition of the Ciliata species of the Khabarovsk Central Pond. In the course of the inventory, 43 Ciliata species belonging to 2 subtypes and 11 classes have been identified, the most numerous of which are Spirotrichea and Oligohymenophorea. Also, 20 species have not previously been recorded on the territory of the Middle Amur Region. By the frequency of occurrence, the vast majority of species (23 representatives) are observed in the solitary samples (up to 15 %). The background species include ciliates such as Coleps hirtus, Strombidium viride, Stylonychia mytilus complex, Paramecium caudatum , and Uronema marinum. It has been found that in the reservoir being studied, the average size (up to 200 μm) ciliates dominate. By the ecotope preferred, the ‘transitional’ cluster representatives prevail, which indicates the possible widespread colonization of the reservoir by protozoa. This is due to the shallow depth of the Central Pond and, therefore, the lack of clear boundaries between individual zones.