Articles | Volume 14, issue 18
https://doi.org/10.5194/bg-14-4085-2017
https://doi.org/10.5194/bg-14-4085-2017
Research article
 | 
19 Sep 2017
Research article |  | 19 Sep 2017

Tracing the origin of the oxygen-consuming organic matter in the hypoxic zone in a large eutrophic estuary: the lower reach of the Pearl River Estuary, China

Jianzhong Su, Minhan Dai, Biyan He, Lifang Wang, Jianping Gan, Xianghui Guo, Huade Zhao, and Fengling Yu

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Cited articles

Bianchi, T. S.: The role of terrestrially derived organic carbon in the coastal ocean: A changing paradigm and the priming effect, P. Natl. Acad. Sci. USA, 108, 19473–19481, https://doi.org/10.1073/pnas.1017982108, 2011a.
Bianchi, T. S., Wysocki, L. A., Schreiner, K. M., Filley, T. R., Corbett, D. R., and Kolker, A. S.: Sources of terrestrial organic carbon in the Mississippi plume region: evidence for the importance of coastal marsh inputs, Aquat. Geochem., 17, 431–456, https://doi.org/10.1007/s10498-010-9110-3, 2011b.
Boesch, D. F., Boynton, W. R., Crowder, L. B., Diaz, R. J., Howarth, R. W., Mee, L. D., Nixon, S. W., Rabalais, N. N., Rosenberg, R., Sanders, J. G., Scavia, D., and Turner, R. E.: Nutrient Enrichment Drives Gulf of Mexico Hypoxia, Eos, Trans. Amer. Geophys. Union, 90, 117–118, https://doi.org/10.1029/2009EO140001, 2009.
Breitburg, D.: Effects of hypoxia, and the balance between hypoxia and enrichment, on coastal fishes and fisheries, Estuaries, 25, 767–781, https://doi.org/10.1007/BF02804904, 2002.
Breteler, W. C. K., Grice, K., Schouten, S., Kloosterhuis, H. T., and Damsté, J. S. S.: Stable carbon isotope fractionation in the marine copepod Temora longicornis: unexpectedly low δ13C value of faecal pellets, Mar. Ecol. Prog. Ser., 240, 195–204, https://doi.org/10.3354/meps240195, 2002.
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We provide direct and quantitative assessments showing the marine organic matter from eutrophication-induced primary production dominated oxygen consumption in the hypoxic zone, while the terrestrially sourced organic matter also significantly contributed to the formation and maintenance of hypoxia in the lower Pearl River Estuary (PRE) and the adjacent coastal water.
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