Abstract
Riverine organic matter consists of a labile (metabolizable) and a residual (non-metabolizable) fraction1. The labile fraction can be oxidized or 'lost' within the rivers2, their estuaries3, and in the marine environment4. Previous estimates of the river fluxes of organic carbon have not considered such potential losses, being based on measurements of the bulk carbon and nitrogen contents5. Here I report detailed chemical analyses of organic matter associated with suspended matter from several major world rivers that have allowed me to differentiate it into labile and refractory fractions. Globally, 35% (81X 1012 g Cyr−1) of it belongs to the labile fraction and may become oxidized in estuaries and in the marine environment. The rest (150 x 1012g Cyr−1) appears to be highly degraded, with the bulk entering present-day tropical and subtropical sea areas. This degraded fraction could represent a significant source of organic carbon accumulating in marine sediments.
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References
Degens, E. T. Mitt. Geol paläont. Inst. Univ. Hamburg SCOPE / UNEP Sonderbd 52, 1–12 (1982).
Richey, J. E. et al. Science 207, 1348–1351 (1980).
Eisma, D. et al. Mitt. geol. paläont. Inst. Univ. Hamburg SCOPE/UNEP Sonderbd 58, 397–412 (1985).
Berner, R. A. Am. J. Sci. 282, 451–473 (1982).
Meybeck, M. Am. J. Sci. 282, 401–450 (1982).
Degens, E. T. (ed.) Mitt. geol. paläont. Inst. Univ. Hamburg, SCOPE/ UNEP Sonderbd 52, 766 (1982).
Degens, E. T., Kempe, S. & Soliman, H. S. (eds) Mitt. geol. paläont. Inst. Univ. Hamburg, SCOPE/ UNEP Sonderbd 55, 535 (1983).
Degens, E. T., Kempe, S. & R. Herrera (eds) Mitt. geol. paläont. Inst. Univ. Hamburg, SCOPE/ UNEP Sonderbd 58, 645 (1985).
Michaelis, W. & Ittekkot, V. Mitt. geol. paläont. Inst. Univ. Hamburg, SCOPE/UNEP Sonderbd 52, 69–89 (1982).
Degens, E. T. & Mopper, K. in Chemical Oceanography, Vol. 7 (eds Riiey, J. P. & Skirrow, G.) 59–113 (Academic, London, 1976).
Gagosian, R. B. & Lee, C. in Marine Organic Chemistry (eds Duursma, E. K. & Dawson, R.) 91–123 (Elsevier, Amsterdam, 1981).
Meybeck, M. in Fluxes of Organic Carbon by Rivers to Oceans (Carbon Dioxide Research Assessment Program) (eds Likens, G. E. et al.) 219–269 (US DOE, Washington, DC, 1981).
Thurman, E. M. Organic Geochemistry of Natural Waters, 497 (Martinus Nijhoff/Junk, the Hague 1985).
Ittekkot, V. & Arain, R. Geochim. cosmochim. Acta 50, 1643–1653 (1986).
Ittekkot, V., Safiullah, S. & Arain, R. Sci. tot. Envir. 58, 93–107 (1986).
Milliman, J. D. & Meade, R. H. J. Geol. 91, 1–21 (1983).
Hedges, J. I. et al. Limnol. Oceanogr. 31, 717–738 (1986).
Ittekkot, V., Safiullah, S., Mycke, B. & Seifert, R. Nature 317, 800–802 (1985).
Hedges, J. I. & Parker, P. L. Geochim. cosmochim. Acta 40, 1019–1029 (1976).
Gearing, P., Plucker, F. E. & Parker, P. L. Mar. Chem. 5, 251–266 (1977).
Sackett, W. M., Eckelmann, W. R., Bender, M. L. & Be, A. W. H. Science 148, 235–237 (1965).
Degens, E. T., Behrendt, M., Gotthardt, B. & Reppmann, E. Deep Sea Res. 15, 11–20 (1968).
Pelet, R. Adv. org. Geochem. 6, 241–250 (Wiley, New York, 1983).
Konta, J. Mitt. geol. paläont. Inst. Univ. Hamburg, SCOPE/ UNEP Sonderbd 58, 569–592 (1985).
Honjo, S. Science 218, 883–884 (1982).
Deuser, W. G., Brewer, P. G., Jickells, T. D. & Commeau, R. F. Science 219, 388–391 (1983).
Sundquist, E. T. in The Carbon Cycle and Atmospheric CO2: Natural Variations Archean to Present (eds Sundquist, E. T. & Broecker, W. S) 5–59 (Am. Geophys. Un., Washington, 1985).
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Ittekkot, V. Global trends in the nature of organic matter in river suspensions. Nature 332, 436–438 (1988). https://doi.org/10.1038/332436a0
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DOI: https://doi.org/10.1038/332436a0
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