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3 more materials “We can confirm a generally high ability of the examined microbiological system for self-cleaning from organic contaminations,” the report reads. “The research showed reduction of organic load between the site where the fuel leaked into the water and the source of the Pyasina River due to physical, chemical and biological processes associated with the water’s self-cleaning.” Experts say that in the examined areas downstream of the accident site, in the Daldykan and Ambarnaya Rivers, the oil contamination had affected the phytoplankton. Contrastingly, in Lake Pyasino and the Pyasina River they discovered the species that used to live there before the accident, which proves that there was no damage from the oil products to the water bodies ecosystem. ....
“The biomass of zoobenthos’ feed organisms has shrunk by more than ten times and by more than two times in the Daldykan and Ambarnaya Rivers,” the expert said. “Due to this, the total damage to water biology resources, estimated in accordance with approved practice of Rosrybolovstvo (fishery authority), is 1.9 million rubles.” The calculation includes expenses on fish stocking, though this work should not be done now, as restocked fish would die without sufficient feed, he added. The expedition also noted that diatoms dominated in the Norilskaya River, in Lake Pyasino and the Pyasina River, as it did many years before the accident, which proves the spill had not affected the ecosystem. ....