Ocean Science Journal

The Korean Society of Oceanography (한국해양학회)
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The Origin and Biogeochemistry of Organic Matter in Surface Sediments of Lake Shihwa and Lake Hwaong

  • Won, Eun-Ji (Department of Environmental Marine Sciences, College of Science and Technology, Hanyang University) ;
  • Cho, Hyen-Goo (Department of Earth and Environmental Sciences, College of Natural Sciences, Gyeongsang National University) ;
  • Shin, Kyung-Hoon (Department of Environmental Marine Sciences, College of Science and Technology, Hanyang University)
  • Published : 2007.12.31
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Abstract

To understand the origin and biogeochemistry of the organic matter in surface sediments of Lake Shihwa and Lake Hwaong, organic nitrogen, inorganic nitrogen, labile organic carbon, and residual organic carbon contents as well as stable isotope ratios for carbon and nitrogen were determined by KOBr-KOH treatment. Ratios of organic carbon to organic nitrogen $(C_{org}/N_{org})$ (mean = 24) were much higher than ratios of organic carbon to total nitrogen $(C_{org}/N_{tot})$ (mean= 12), indicating the presence of significant amounts of inorganic nitrogen in the surface sediments of both lakes. Stable isotope ratios for organic nitrogen were, on average, $5.2\%_{\circ}$ heavier than ratios of inorganic nitrogen in Lake Shihwa, but those same ratios were comparable in Lake Hwaong. This might be due to differences in the origin or the degree of degradation of sedimentary organic matter between the two lakes. In addition, stable isotope ratios for labile organic carbon were, on average, $1.4\%_{\circ}$ heavier than those for residual organic carbon, reflecting the preferential oxidation of $^{13}C$-enriched organic matter. The present study demonstrates that KOBr-KOH treatment of sedimentary organic matter can provide valuable information for understanding the origin and degradation state of organic matter in marine and brackish sediments. This also suggests that the ratio of $(C_{org}/N_{org})$ and stable isotope ratios for organic nitrogen can be used as indexes of the degree of degradation of organic matter.

Keywords

References

  1. Altabet, M.A., R. Francois, D.W. Murray, and W.L. Prell. 1995. Climate-related variations in denitrification in the Arabian Sea from sediment $^{15}$/N$^{14}$N ratios. Nature, 373, 506-509 https://doi.org/10.1038/373506a0
  2. Boatman, C.D. and J.W Murray. 1982. Modeling exchangeable NH$_{4}$$^{+}$ adsorption in marine sediments: Process and controls of adsorption. Limnol. Oceanogr., 27, 99-110 https://doi.org/10.4319/lo.1982.27.1.0099
  3. Butcher, S.S., R.J. Charlson, G. H. Orians, and G.V. Wolfe. 1992. Global biogeochemical cycles. Academic press, San Diego. 379 p
  4. Calvert, S.E., B. Nielsen, and M.R. Fontugne. 1992. Evidence from nitrogen isotope ratios for enhanced productivity during formation of eastern Mediterranean sapropels. Nature, 359, 223-225 https://doi.org/10.1038/359223a0
  5. Francois, R., M.A. Altabet, and L.H. Burckle. 1992. Glacial to interglacial changes in surface nitrate utilization in the Indian sector of the Southern Ocean as recorded by sediment $^{15}$N. Paleoceanogr., 7, 589-606 https://doi.org/10.1029/92PA01573
  6. Freudenthal, T., T. Wagner, F. Wenzhofer, M. Zabel, and G. Wefer. 2001. Early diagenesis of organic matter from sediments of the eastern subtropical Atlantic: Evidence from stable nitrogen and carbon isotopes. Geochem. Cosmochim. Acta, 65, 1795-1808 https://doi.org/10.1016/S0016-7037(01)00554-3
  7. Fry, B. and E.B. Sherr. 1984. $\delta^{13}$C measurements as indicators of carbon flow in marine and freshwater ecosystem. Contrib. Mar. Sci., 27, 13-47
  8. Hartmann, M., P.J. Muller, E. Suess, and C.H. vander Weijden. 1973. Oxidation of organic matter in recent marine sediments 'Meteor' Forsch. Ergebnisse, C12, 74-86
  9. Kang, H.S., E.J. Won, K.H. Shin, and H.I. Yoon. 2007. Organic carbon and nitrogen composition in the sediment of the Kara Sea, Arctic Ocean during the Last Glacial Maximum to Holocene times. Geophys. Res. Lett., 34, L12607, doi:10.1029/2007GL030068
  10. Keeney, D.R., and D.W. Nelson. 1982. Nitrogen-inorganic forms. p. 643-698. In: Methods of Soil Analysis. Part 2: Chemical and Microbiological Properties, ed. by A. L. Page, R.H. Miller, and D.R. Keeney. American Society of Agronomy, Madison, Wisconsin
  11. Lehmann, M.F., S.M. Bernasconi, A. Barbieri, and J.A. Mckenzie. 2002. Preservation of organic matter and alteration of its carbon and nitrogen isotope composition during simulated and in situ early sedimentary diagenesis. Geochim. Cosmochim. Acta, 66, 3573-3584 https://doi.org/10.1016/S0016-7037(02)00968-7
  12. McArthur, J.M., R.V, Tyson, J. Thomson, and D. Mattey. 1992. Early diagenesis of marine organic matter: Alteration of the carbon isotopic composition. Mar. Geol., 105, 51-61 https://doi.org/10.1016/0025-3227(92)90181-G
  13. Meyers, P.A. 1994. Preservation of elemental and isotopic source identification of sedimentary organic matter. Chem. Geol., 144, 289-302
  14. Muller, P.J. 1977. C/N ratios in Pacific deep-sea sediments: Effect of inorganic ammonium and organic nitrogen compounds sorbed by clays. Geochim. Cosmochim. Acta, 41, 765-776 https://doi.org/10.1016/0016-7037(77)90047-3
  15. Peterson, B.J., and R.W. Howarth. 1987. Sulfur, carbon, and nitrogen isotopes used to trace organic matter flow in the salt-marsh estuaries of Sapelo Island, Georgia. Limnol. Oceanogr., 32, 1195-1213 https://doi.org/10.4319/lo.1987.32.6.1195
  16. Philip, A.M. 1997. Organic geochemical proxies of paleoceanographic, paleolimnologic, and paleoclimatic processes. Org. Geochem., 27, 213-250 https://doi.org/10.1016/S0146-6380(97)00049-1
  17. Prahl, F.G, G.J. de Lange, S. Scholten, and G.L. Cowie. 1997. A case of post-depositional aerobic degradation of terrestrial organic matter in turbidite deposits from the Madeira Abyssal Plain. Org. Geochem., 27, 41-152 https://doi.org/10.1016/S0146-6380(97)00046-6
  18. Redfield, A.C., B.H. Ketchum, and F.A. Richards. 1963. The influence of organisms on the composition of sea water. p. 26-77. In: The Sea, ed. by M.N. Hill, Wiley, New York
  19. Rosenfeld, J.K. 1979. Ammonium adsorption in nearshore anoxic sediments. Limnol. Oceanogr., 24, 356-364 https://doi.org/10.4319/lo.1979.24.2.0356
  20. Ruttenberg, K.C. and M.A. Goni. 1997. Phosphorus distribution, C:N:P ratios, and ${\delta}^{13}C_{oc}$, in arctic, temperature, and tropical coastal sediment: Tools for characterizing bulk sedimentary organic matter. Mar. Geol., 139, 123-145 https://doi.org/10.1016/S0025-3227(96)00107-7
  21. Sahrawat, K.L. 1995. Fixed ammonium and carbon-nitrogen ratios of some semi-arid tropical Indian soils. Geoderma, 68, 219-224 https://doi.org/10.1016/0016-7061(95)00031-I
  22. Schachtschabel, P. 1961. Bestimmung des fixierten Ammoniums im Boden. Zeitung Pflanzenernahrung Diingung Bodenkunde, 93, 125-136
  23. Scheffer, F. and P. Schachtschnabel. 1984. Lehrbuch der Bodenkunde. Enke Verlag, Stuttgart. 442 p
  24. Schubert, C.J. and S.E. Calvert. 2001. Nitrogen and Carbon isotope composition of marine and terrestrial organic matter in Arctic Ocean sediment: implications for nutrient utilization and organic matter composition. Deep-Sea Res. Part I, 48, 789-810 https://doi.org/10.1016/S0967-0637(00)00069-8
  25. Silva, J.A. and J.M. Bremner. 1966. Determination and isotope ratio analysis of different forms of nitrogen in soils. 5. Fixed ammonium. Soil Sci. Soc. Amer. Proc., 30, 587-594 https://doi.org/10.2136/sssaj1966.03615995003000050017x
  26. Stevenson, F.J., C.N. Cheng. 1972. Organic geochemistry of the Argentine Basin sediments: Carbon-nitrogen relationships and Quaternary correlations. Geochim. Cosmochim. Acta, 36, 653-671 https://doi.org/10.1016/0016-7037(72)90109-3
  27. Tyson, R.V. 1995. Sedimentary organic matter, organic facies and palynofacies. Chapman & Hall, London. 485 p
  28. Winkelmann, D. and J. Knies. 2005. Recent distribution and accumulation of organic carbon on the continental margin west off Spitsbergen. Geochem. Geophys. Geosyst. doi: 10.1029/2005GC00091