State of Zooplankton and Zoobenthos in the Water Bodies of the Lake Pyasino Basin after a Technogenic Accident

Abstract—The taxonomic composition and quantitative characteristics of zooplankton and zoobenthos of several water bodies of natural origin have been studied in the Norilsk industrial region and adjacent territories a year after a technogenic accident. All age groups of most invertebrate species have been recorded at most sampling sites. Slightly disturbed watercourses are registered in the source of the Pyasina River and in the Daldykan River, located upstream the confluence of the Bezymyanny stream. These water bodies may serve as the background reservoirs for organizing restoration activities accompanied by an assessment of the ecological well-being of planktonic and bottom fauna of freshwater ecosystems.