Seasonal Distribution of Dissolved and Particulate Organic Carbon in the Water Column of a Meromictic Lake
J. Dunalska1*, D. Górniak2, M. Teodorowicz1, K. Gąsecka1
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1 Chair of Environmental Protection Engineering, University of Warmia and Mazury, Prawocheńskiego 1, 10-950 Olsztyn, Poland
2 Department of Microbiology, University of Warmia and Mazury in Olsztyn, Poland
Pol. J. Environ. Stud. 2004;13(4):375–379
This study investigated concentration changes of dissolved and particulate organic carbon in a meromictic lake to determine the lake’s productivity. It was revealed that the dominant form of organic carbon was the dissolved form (DOC). Maximum production activity was observed in summer (with the peak in June). At the same time, the factors restricting that process were determined, such as: strong pressure of the bacteria competing with the phytoplankton for mineral nutrients, and simultaneous precipitation of phosphates on HS-Fe complexes. The generated organic matter was settling intensively, and one of the transport methods of the dissolved organic matter was adsorption on calcium carbonate and bacterial transformation of the part of DOC into POC.