Biodegradable dissolved organic carbon and its optical characteristics within the boggy catchment in the southern taiga of Western Siberia

In this study, we have provided new and important findings with regards to the spatial distribution of DOM concentration, bioavailability, optical properties during early summer hydrologic conditions within Bakcharsky bog complex in southern taiga subzone Western Siberia. Data on biodegradable fractions surface soil waters were obtained basis laboratory experiments analytical work. Surface landscape differences their chemical composition. The lowest values pH, DOC, degree humification, Ca, Mg, Na, P, Fe are characteristic open sedge-sphagnum fen. There is a different intensity DOC degradation, depending microlandscape. process OM biodegradation occurs most significantly 7-14th day experiment. maximum microbial decay reaching some cases ≥ 20%, observed river waters, UV-visible measurements showed that SUVA254, E2:E3, E4:E6 ratios change incubation, while E2:E4 remain fairly constant over time.