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Isotopic effects of suspended organic matter fluxes in the Solina reservoir (SE Poland)

Koszelnik P.

Environment Protection Engineering

2009

Vol. 35, nr 4

13-19

The aim of the study was to describe the source and fate of lacustrine suspended organic matter on the basis of nitrogen and carbon isotope effects. During complete depletion of dissolved silica in epilimnion, the differences in nitrogen isotope between substrates and products show that a primary production of organic matter (OM) in the euphotic zone of the reservoir is stimulated by nitrates. Additionally, in the hypolimnion, the decomposition of OM occurs, which in the case of a high primary production may lead to oxygen depletion.