Colonial Invertebrates in the Zooperiphyton of the Cooling Pond of Combined Heat and Power Plant (Western Siberia)

Data on the taxonomic composition of freshwater sponges and bryozoans in the cooling pond of CHPP-1 (Tyumen), as well as data on their distribution in the water area at five stations in 2005, 2016, and 2017, are given. The seasonal development of colonial invertebrates, as well as the influence of high temperatures on the occurrence and biomass of sponges, are considered. It is shown that the most favorable living conditions are formed in lotic biotopes. The size characteristics of gemmules and spicules of sponge Eunapius fragilis (Leidy.) and flotoblasts of bryozoans Plumatella emarginata (Allman.) and Hyalinella punctata (Hancock) are given.