Abstract
Abstract The effects of abiotic environmental conditions, such as water oxygen content, pH and temperature, on the release of biogenic substances (mainly orthophosphates) from bottom sediments were examined in freshly collected samples from Lake Góreckie, Wielkopolski National Park. It was observed that their release was favoured by anaerobic conditions, alkaline pH and elevated temperatures, which are conditions naturally occurring in surface waters, especially in reservoirs of higher trophy.
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