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Evidence from nitrogen isotope ratios for enhanced productivity during formation of eastern Mediterranean sapropels

Nature volume 359, pages 223–225 (1992)Cite this article

Abstract

THE formation of horizons of organic-rich sediment (sapropels) in the eastern Mediterranean during the Holocene and Upper Pleistocene1 has been ascribed2 to enhanced preservation of organic carbon in bottom waters rendered anoxic by the restriction of deep-water renewal, either by lowered sea level during glacial maximum conditions3 or by the presence of low-salinity surface waters derived from increased runoff2,4. A second possibility is that the sapropels formed as a consequence of higher settling fluxes of organic matter caused by increased primary production connected with the increased runoff5,6. Here we report that in a sediment core from close to the mouth of the Nile, the sapropels have significantly lighter nitrogen isotope ratios (15N/<14N) than the intercalated marl oozes. We adduce evidence that these large differences cannot be caused either by variable mixtures of marine and terrestrial organic matter having different isotopic compositions, or by differences in the extent and type of post-depositional alteration. The differences are consistent, however, with a higher utilization of dissolved nitrate during sapropel formation, implying that the sapropels were ultimately formed as a consequence of high plankton production, which led to high fluxes of organic matter to the sea floor.

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References

  1. Kullenberg, B. K. Vet. O. Vitterh. Samh. Handl. B6, 3–37 (1952).

    Google Scholar 

  2. Olausson, E. Rep. Swedish Deep-Sea Exped. 8, 337–391 (1961).

    CAS  Google Scholar 

  3. Bradley, W. H. Science 88, 376–379 (1938).

    Article  ADS  CAS  Google Scholar 

  4. Rossignol-Strick, M., Nesteroff, W., Olive, P. & Vergnaud-Grazzini, C. Nature 295, 105–110 (1982).

    Article  ADS  Google Scholar 

  5. Berger, W. H. in Chemical Oceanography (eds Riley, J. P. & Chester, R.) 265–388 (Academic, London, 1976).

    Google Scholar 

  6. Calvert, S. E. Oceanol. Acta 6, 255–267 (1983).

    CAS  Google Scholar 

  7. Fontugne, M. R. & Calvert, S. E. Paleoceanography 7, 1–20 (1992).

    Article  ADS  Google Scholar 

  8. Cita, M. B. et al. Quat. Res. 8, 205–235 (1977).

    Article  CAS  Google Scholar 

  9. Smith, D. J., Eglinton, G. & Morris, R. J. Phil. Trans. R. Soc. A319, 375–415 (1986).

    Article  ADS  CAS  Google Scholar 

  10. ten Haven, H. L., Baas, M., de Leeuw, J. W. & Schenck, P. A. Mar. Geol. 75, 137–156 (1987).

    Article  ADS  CAS  Google Scholar 

  11. Sweeney, R. E., Liu, K. K. & Kaplan, I. R. in Stable Isotopes in the Earth Sciences (ed Robinson, B. W.) 9–26 (DSIR Bulletin, 1978).

    Google Scholar 

  12. Miyake, Y. & Wada, E. Rec. Oceanogr. Works Japan 11, 1–6 (1971).

    CAS  Google Scholar 

  13. Wada, E. in Isotope marine Chemistry (eds Goldberg, E. D., Horibe, Y. & Saruhashi, K.) 375–398 (Uchida Rokahuko, Tokyo, 1980).

    Google Scholar 

  14. Macko, S. A. & Estep, M. L. F. Org. Geochem. 6, 787–790 (1984).

    Article  CAS  Google Scholar 

  15. Macko, S. A., Estep, M. L. F., Engel, M. H. & Hare, P. E. Geochim. cosmochim. Acta 50, 2143–2146 (1986).

    Article  ADS  CAS  Google Scholar 

  16. Macko, S. A., Estep, M. L. F., Hare, P. E. & Hoering, T. C. Chem. Geol. 65, 79–92 (1987).

    Article  CAS  Google Scholar 

  17. Silfer, J. A., Engel, M. H. & Macko, S. A. Isotope Geosci. (in the press).

  18. Saino, T. & Hattori, A. Nature 283, 752–754 (1980).

    Article  ADS  CAS  Google Scholar 

  19. Saino, T. & Hattori, A. Deep-Sea Res. 34, 807–827 (1987).

    Article  ADS  CAS  Google Scholar 

  20. Altabet, M. A. Deep-Sea Res. 35, 535–554 (1988).

    Article  ADS  CAS  Google Scholar 

  21. Wada, E., Terazaki, M., Kabaya, Y. & Nemoto, T. Deep-Sea Res. 34, 829–841 (1987).

    Article  ADS  CAS  Google Scholar 

  22. Altabet, M. A., Deuser, W. G., Honjo, S. & Steinen, C. Nature 354, 136–139 (1991).

    Article  ADS  Google Scholar 

  23. Macko, S. A. thesis, Univ. of Texas at Austin (1981).

  24. Libes, S. M. thesis, Woods Hole/Massachusetts Inst. Technol. Joint Program in Oceanography (1983).

  25. Altabet, M. A. & Francois, R. Geochim. cosmochim. Acta (submitted).

  26. Wada, E. & Hattori, A. Geomicrobiol. J. 1, 85–101 (1978).

    Article  CAS  Google Scholar 

  27. Montoya, J. P. thesis, Harvard Univ. (1990).

  28. Biggs, D. C. et al. in Init. Rep. Ocean Drilling Program (Part A) (eds Barker, P. F. & Kennett, J. P.) 77–86 (Ocean Drilling Program, College Station, Texas, 1988).

    Google Scholar 

  29. Cifuentes, L. A., Fogel, M. L., Pennock, J. R. & Sharp, J.H. Geochim. cosmochim. Acta 53, 2713–2721 (1989).

    Article  ADS  CAS  Google Scholar 

  30. Montoya, J. P., Horrigan, S. G. & McCarthy, J. J. Geochim. cosmochim. Acta 55, 3627–3638 (1991).

    Article  ADS  CAS  Google Scholar 

  31. Wada, E. & Hattori, A. Geochim. cosmochim. Acta 40, 249–251 (1976).

    Article  ADS  Google Scholar 

  32. Francols, R. & Altabet, M. A. Paleoceanography (in the press).

  33. Boyle, E. A. & Lea, D. W. Trans. Am. geophys. Un. 70, 1134 (1989).

    Google Scholar 

  34. Lohman, G. P. & Pride, C. J. Trans. Am. geophys. Un. 70, 1134 (1989).

    Google Scholar 

  35. Stanley, D. J. Nature 274, 149–152 (1978).

    Article  ADS  Google Scholar 

  36. Rossignol-Strick, M. Palaeogeogr. Palaeoclim. Palaeoecol. 49, 237–263 (1985).

    Article  ADS  Google Scholar 

  37. Fontugne, M. R. et al. in Late Quaternary Chronology and Paleoclimates of the Eastern Mediterranean (eds Bar-Yosef, O. & Kra, R. S.) (in the press).

  38. Hoering, T. C. & Ford, H. T. J. Am. chem. Soc. 82, 225–232 (1960).

    Article  Google Scholar 

  39. Delwiche, C. C. & Steyn, P. L. Envir. Sci. Technol. 4, 929–935 (1970).

    Article  ADS  CAS  Google Scholar 

  40. Minagawa, M. & Wada, E. Mar. Chem. 19, 245–259 (1986).

    Article  CAS  Google Scholar 

  41. Checkley, D. M. Jr & Miller, C. A. Deep-Sea Res. 36, 1449–1456 (1989).

    Article  ADS  CAS  Google Scholar 

  42. Sournia, A. Ann. Biol. 9, 63–76 (1970).

    Google Scholar 

  43. Zernova, V. V. Tr. Inst. Okeanol. Akad. Nausk. SSSR 58, 45–53 (1962).

    Google Scholar 

  44. Carpenter, E. J. & Romans, K. Science 254, 1356–1358 (1991).

    Article  ADS  CAS  Google Scholar 

  45. Troelstra, S. R., Ganssen, G. M., Van Der Borg, K. & De Jong, A. F.M. Radiocarbon 33, 15–21 (1991).

    Article  Google Scholar 

  46. Howell, M. W. & Thunell, R. C. Mar. Geol. 103, 461–471 (1992).

    Article  ADS  CAS  Google Scholar 

  47. de Lange, G. J. & ten Haven, H. L. Nature 305, 797–798 (1983).

    Article  ADS  CAS  Google Scholar 

  48. Sarmiento,, J. L., Herbert, T. & Toggweiler, J. R. Global biogeochem. Cycles 2, 427–444 (1988).

    Article  ADS  CAS  Google Scholar 

  49. Calvert, S. E. in Marine Petroleum Source Rocks (eds Brooks, J. & Fleet, A. J.) 137–151 (Geological Society of London, London, 1987).

    Google Scholar 

  50. Cita, M. B. et al. Quat. Res. 8, 205–235 (1977).

    Article  CAS  Google Scholar 

  51. Sweeney, R. E. & Kaplan, I. R. Mar. Chem. 9, 81–94 (1980).

    Article  CAS  Google Scholar 

  52. Rau, G. H., Arthur, M. A. & Dean, W. E. Earth planet. Sci. Lett. 82, 269–279 (1987).

    Article  ADS  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Oceanography, University of British Columbia, Vancouver, British Columbia, Canada, V6T 1W5

    S. E. Calvert & B. Nielsen

  2. Laboratoire Mixte CNRS-CEA, Centre des Faibles Radioactivités, Avenue de la Terrasse, 91198, Gif-sur-Yvette Cedex, France

    M. R. Fontugne

Authors
  1. S. E. Calvert
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  2. B. Nielsen
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  3. M. R. Fontugne
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Calvert, S., Nielsen, B. & Fontugne, M. Evidence from nitrogen isotope ratios for enhanced productivity during formation of eastern Mediterranean sapropels. Nature 359, 223–225 (1992). https://doi.org/10.1038/359223a0

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