Abstract
The data on changes in the vertical distribution of free-living ciliates from a freshwater meromictic pond (city of Samara) within a year are presented. The specific character of the waterbody is that the taxonomic diversity of ciliates of pelagic plankton is mainly formed not by usual euplanktonic species, but by ciliates of highly specialized ecological groups such as mixotrophs, “benthic migrants,” and sapropelic species. The ciliate fauna is similar to the fauna of thermally stratified lakes with anaerobic hypolimnion. The maximal abundance and biomass of ciliates during the year and their high absolute values are determined by the existence of stable gradients of abiotic factors and, in the first turn, concentrations of oxygen, hydrogen sulfide, and oxidation-reduction potential.
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Original Russian Text © S.V. Bykova, 2015, published in Biologiya Vnutrennikh Vod, 2015, No. 2, pp. 69–79.
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Bykova, S.V. Ecological specificity and spatial and temporal distribution of ciliates from the pelagic plankton of a fresh meromictic waterbody. Inland Water Biol 8, 166–176 (2015). https://doi.org/10.1134/S1995082915020030
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DOI: https://doi.org/10.1134/S1995082915020030