Dissolved organic matter transformation in the hyporheic zone of a small lowland river

• Autorzy: Zieliński, P. , Jekatierynczuk-Rudczyk, E.
• Języki publikacji: EN

Abstrakty

EN

The objective of this study was to examine dissolved organic carbon (DOC) concentration and specific ultraviolet absorbance (SUVA) changes in porewaters that occur over a small scale (cm) in the hyporheic zone (HZ) of a lowland stream in the Knyszynska Forest in northeast Poland. Hyporheic zone porewaters were sampled at different depths of 10, 30, 50, 70 cm at two study sites with different sediment material. The results showed significant differences in DOC concentrations between the upper and lower stream HZ. The current results indicate that small lowland sediments provide both a source and a sink of DOC for stream water, depending on the river course. The higher DOC level observed in the hyporheic zone suggests that porewater can be an autonomic site of biogeochemical changes of dissolved organic matter, which is very clear in the SUVA fluctuations.

Słowa kluczowe

EN

dissolved organic carbon; specific ultraviolet absorbance (SUVA); SUVA; hyporheic zone; lowland rivers

• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2010
• Tom: Vol. 39, No.2
• Strony: 97-103
• Opis fizyczny: bibliogr. 10 poz., tab., wykr.

Twórcy

autor

Zieliński, P.

autor

Jekatierynczuk-Rudczyk, E.

• Department of Hydrobiology, Institute of Biology, University of Białystok ul. Świerkowa 20 B, 15-950 Białystok, Poland,

Bibliografia

• 1.Bencala K.E., 2000, Hyporheic zone hydrological processes, Hydrological Processes, 14: 2797-2798.
• 2.Buttorini A., Sabater F., 2000, Seasonal variability of dissolved organic carbon in a Mediterranean stream, Biogeochemistry, 51: 303-321.
• 3.Brunke M., 1998, The influence of hydrological exchange patterns on environmental gradients and community ecology in hyporheic intersticies of prealpine river, SFIT, Zurich, 213 pp.
• 4.Findlay S., Strayer D., Goumbala C., Gould K., 1993, Metabolism of streamwater dissolved organic carbon in the shallow hyporheic zone, Limnol. Oceanogr., 38: 1493-1499.
• 5.Fischer H., Sachse A., Steinberg C.E.W., Pusch M., 2002, Differential retention and utilization of dissolved organic carbon by bacteria in river sediments, Limnol. Oceanogr., 47: 1702-1711.
• 6.Hancock P.J., 2002, Human impacts on the stream-groundwater exchange zone, Environ. Manag., 29: 763-781
• 7.Hermanowicz W., Dożańska W., Dojlido J., Koziorowski B., Zerbe J., 1999, Fizyczno-chemiczne badania wody i ścieków. Arkady, Warszawa, 846 pp (in Polish)
• 8.Jones J.B., Holmes R.M., 1996, Surface-subsurface interactions in stream ecosystems, Trends in Ecology and Evolution, 11: 239-242
• 9.Schindler J.E., Krabbenhoft D.P., 1998, The hyporheic zone as a source of dissolved organic carbon gases to a temperate forested stream, Biogeochemistry, 43: 157-174
• 10.Uzarski D.G., Stricker C.A., Burton T.M., King D.K., Steinman A.D., 2004, The importance of hyporheic sediment respiration in several mid-order Michigan rivers: comparison between methods in estimates of lotic metabolism, Hydrobiologia, 518: 47-57