Estuaries

, Volume 19, Issue 2, pp 386–407 | Cite as

Nutrient changes in the Mississippi River and system responses on the adjacent continental shelf

  • Nancy N. Rabalais
  • R. Eugene Turner
  • Dubravko JustiĆ
  • Quay Dortch
  • William J. Wiseman
  • Barun K. Sen Gupta
Article

Abstract

The Mississippi River system ranks among the world's top 10 rivers in freshwater and sediment inputs to the coastal ocean. The river contributes 90% of the freshwater loading to the Gulf of Mexico, and terminates amidst one of the United States' most productive fisheries regions and the location of the largest zone of hypoxia, in the western Atlantic Ocean. Significant increases in riverine nutrient concentrations and loadings of nitrate and phosphorus and decreases in silicate have occurred this century, and have accelerated since 1950. Consequently, major alterations have occurred in the probable nutrient limitation and overall stoichiometric nutrient balance in the adjacent continental shelf system. Changes in the nutrient balances and reduction in riverine silica loading to, the continental shelf appear to have led to phytoplankton species shifts offshore and to an increase in primary production. The phytoplankton community response, as indicated by long-term changes in biological uptake of silicate and accumulation of biologically bound silica in sediments, has shown how the system has responded to changes in riverine nutrient loadings. Indeed, the accumulation of biologically bound silica in sediments beneath the Mississippi River plume increased during the past two decades, presumably in response to, increased nitrogen loading. The duration, size, and severity of hypoxia has probably increased as a consequence of the increased primary production. Management alternatives directed at water pollution issues within the Mississippi River watershed may have unintended and contrasting impacts on the coastal waters of the northern Gulf of Mexico.

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Literature Cited

  1. Andersson, L. and L. Rydberg. 1988. Trends in nutrient and oxygen conditions within the Kattegat: Effects on local nutrient supply. Estuarine, Coastal and Shelf Science 26:559–579.CrossRefGoogle Scholar
  2. Atkinson, L. P. and D. Wallace. 1975. The source of unusually low surface salinities in the Gulf Stream off Georgia. Deep-Sea Research 23:913–916.Google Scholar
  3. Bien, G. S., D. E. Contois, and W. H. Thomas. 1958. The removal of soluble silica from fresh water entering the sea. Geochimica et Cosmochimica Acta 14:35–54.CrossRefGoogle Scholar
  4. Cochrane, J. D. and F. J. Kelly. 1986. Low-frequency circulation on the Texas-Louisiana shelf. Journal of Geophysical Research 91:10645–10659.CrossRefGoogle Scholar
  5. Conley, D. J., S. S. Kolham, and E. Theriot. 1989. Differences in silica content between marine and freshwater diatoms. Limnology and Oceanography 34:205–213.CrossRefGoogle Scholar
  6. Conley, D. J., C. L. Schelske, and E. F. Stoermer. 1993. Modification of the biogeochemical cycle of silica with eutrophication. Marine Ecology Progress Series 101:179–192.CrossRefGoogle Scholar
  7. Dagg, M. J. 1988. Physical and biological responses to the passage of a winter storm in the coastal and inner shelf waters of the northern Gulf of Mexico. Continental Shelf Research 8: 167–178.CrossRefGoogle Scholar
  8. Dickey, R. W., G. A. Fryxell, H. R. Granade, and D. Roelke. 1992. Detection of the marine toxins okadaic acid and domoic acid in shellfish and phytoplankton in the Gulf of Mexico. Toxicon 30:355–359.CrossRefGoogle Scholar
  9. Dimego, G. J., L. F. Bosart, and G. W. Endersen. 1976. An examination of the frequency and mean conditions surrounding frontal incursions into the Gulf of Mexico and Caribbean Sea. Monthly Weather Review 104:709–718.CrossRefGoogle Scholar
  10. Dinnel, S. P. and W. J. Wiseman, Jr. 1986. Fresh water on the Louisiana and Texas shelf. Continental Shelf Research 6:765–784.CrossRefGoogle Scholar
  11. Dortch, Q. and T. E. Whitledge. 1992. Does nitrogen or silicon limit phytoplankton production in the Mississippi River plume and nearby regions? Continental Shelf Research 12:1293–1309.CrossRefGoogle Scholar
  12. Dortch, Q., A. Bode, and R. R. Twilley. 1992a. Nitrogen uptake and regeneration in surface waters of the Louisiana continental shelf influenced by the Mississippi River, p. 52–56. In Proceedings, Nutrient Enhanced Coastal Ocean Productivity Workshop. Publ. no. TAMU-SG-92-109, Texas Sea Grant College Program, Texas A&M University, College Station, Texas.Google Scholar
  13. Dortch, Q., D. Milsted, N. N. Rabalais, S. E. Lohrenz, D. G. Redalje, M. J. Dagg, R. E. Turner, and T. E. Whittedge. 1992b. Role of silicate availability in phytoplankton species composition and the fate of carbon, p. 76–83. In. Proceedings, Nutrient Enhanced Coastal Ocean Productivity Workshop. Publ. no TAMU-SG-92-109, Texas Sea Grant College Program, Texas A&M University, College Station, Texas.Google Scholar
  14. Eleuterius, L., H. Perry, C. Eleuterius, J. Warren, and J. Caldwell. 1981. Causative analysis on a nearshore bloom of Oscillatoria erythraea (Trichodesmium) in the northern Gulf of Mexico. Northeast Gulf Science 5:1–11.Google Scholar
  15. Fucik, K. W. 1974. The effect of petroleum operations on the phytoplankton ecology of the Louisiana coastal waters. M.S. thesis, Texas A&M University, College Station, Texas.Google Scholar
  16. Goldman, J. C. and P. M. Glibert. 1983. Kinetics of inorganic nitrogen uptake by phytoplankton, p. 223–274. In E. J. Carpenter and D. G. Capone (eds.), Nitrogen in Marine Environment. Academic Press, New York.Google Scholar
  17. Hallegraeff, G. M. 1993. A review of harmful algal blooms and their apparent global increase. Phycologia 32:79–99.Google Scholar
  18. Harrison, P. J., H. L. Conway, R. W. Holmes, and C. O. Davis. 1977. Marine diatoms in chemostats under silicate or ammonium limitation. III. Cellular chemical composition and morphology of three diatoms. Marine Biology 43:19–31.CrossRefGoogle Scholar
  19. Heckey, R. E. and P. Kilham. 1988. Nutrient limitation of phytoplankton in freshwater and marine environments: A review of recent evidence on the effects of enrichment. Limnology and Oceanography 33:796–822.Google Scholar
  20. Hill, A. E. and J. H. Simpson. 1989. On the interaction of thermal and haline fronts: The Islay front revisited. Estuarine, Coastal and Shelf Science 28:495–505.CrossRefGoogle Scholar
  21. Justić, D., T. Legović, and L. Rottini-Sandrini. 1987. Trends in the oxygen content 1911–1984 and occurrence of benthic mortality in the northern Adriatic Sea. Estuarine, Coastal and Shelf Science 25:435–445.CrossRefGoogle Scholar
  22. Justić, D., N. N. Rabalais, and R. E. Turner. 1994. Riverborne nutrients, hypoxia, and coastal ecosystem evolution: Biological responses to long-term changes in nutrient loads carried by the Po and Mississippi rivers, p. 161–67. In K. R. Dyer and R. J. Orth (eds.), Changes in Fluxes of Estuaries: Implications from Science to Management. Proceedings of Estuarine and Coastal Sciences Association/Estuarine Research Federation Symposium. International Symposium Series, Olsen & Olsen, Fredensborg, Denmark.Google Scholar
  23. Justić, D., N. N. Rabalais, and R. E. Turner. 1995a. Stoichiometric nutrient balance and origin of coastal eutrophication. Marine Pollution Bulletin 30:41–46.CrossRefGoogle Scholar
  24. Justić, D., N. N. Rabalais, R. E. Turner, and Q. Dortch. 1995b. Changes in nutrient structure of river-dominated coastal waters: Stoichiometric nutrient balance and its consequences. Estuarine, Coastal and Shelf Science 40:339–356.CrossRefGoogle Scholar
  25. Justić, D., N. N. Rabalais, R. E. Turner, and W. J. Wiseman, Jr. 1993. Seasonal coupling between riverborne nutrients, net productivity, and hypoxia. Marine Pollution Bulletin 26:184–189.CrossRefGoogle Scholar
  26. Kimsey, J. B. and R. F. Temple. 1963. Currents on the continental shelf of the northwestern Gulf of Mexico. United States Bureau of Commercial Fisheries Circular 161:23–27.Google Scholar
  27. Kimsey, J. B. and R. F. Temple. 1964. Currents on the continental shelf of the northwestern Gulf of Mexico. United States Bureau of Commercial Fisheries Circular 183:25–27.Google Scholar
  28. Loder, T. C. and R. P. Reichard. 1981. The dynamics of conservative mixing in estuaries. Estuaries 4:64–69.CrossRefGoogle Scholar
  29. Lohrenz, S. E., M. J. Dagg, and T. E. Whitledge. 1990. Enhanced primary production at the plume/oceanic interface of the Mississippi River. Continental Shelf Research 10:639–664.CrossRefGoogle Scholar
  30. Lohrenz, S. E., G. L. Fahnenstiel, and D. G. Redalje. 1994. Spatial and temporal variations in photosynthesis parameters in relation to environmental conditions in coastal waters of the northern Gulf of Mexico. Estuaries 17:779–795.CrossRefGoogle Scholar
  31. Martin, J., K. Haya, and L. E. Burridge. 1990. Nitzschia pseudodelicatissima—A source of domoic acid in the Bay of Fundy, eastern Canada. Marine Ecology Progress Series 67:177–182.CrossRefGoogle Scholar
  32. Meybeck, M. 1982. Carbon, nitrogen, and phosphorus transport by world rivers. American Journal of Science 282:401–450.CrossRefGoogle Scholar
  33. Milliman, J. D. and R. H. Meade. 1983. World-wide delivery of river sediment to the oceans. The Journal of Geology 91:1–21.CrossRefGoogle Scholar
  34. National Oceanic and Atmospheric Administration. 1987. National Estuarine Inventory. Data Atlas. National Oceanic and Atmospheric Administration, National Ocean Service, Strategic Assessment Branch, Ocean Assessments Division, Office of Oceanography and Marine Assessment, Rockville, Maryland.Google Scholar
  35. Nelson, D. M. and M. A. Brzezinski. 1990. Kinetics of silicic acid uptake by natural diatom assemblages in two Gulf Stream warm-core rings. Marine Ecology Progress Series 62:283–292CrossRefGoogle Scholar
  36. Officer, C. B. and J. H. Ryther. 1980. The possible importance of silicon in marine eutrophication. Marine Ecology Progress Series 3:83–91.CrossRefGoogle Scholar
  37. Officer, C. B., R. B. Biggs, J. L. Taft, L. E. Cronin, M. Tyler, and W. R. Boynton. 1984. Chesapeake Bay anoxia: Origin, development, and significance. Science 223:22–27.CrossRefGoogle Scholar
  38. Parsons, T. R., Y. Maita, and M. Lalli. 1984. A manual of chemical and biological methods for seawater analysis. Pergamon Press, New York.Google Scholar
  39. Qureshi, N. A. 1995. The role of fecal pellets in the flux of carbon to the sea floor on a river-influenced continental shelf subject to hypoxia. Ph.D. dissertation, Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, Louisiana.Google Scholar
  40. Rabalais, N. N., R. E. Turner, and Q. Dortch. 1992a. Louisiana continental shelf sediments: Indicators of riverine influence, p. 131–135. In. Proceedings, Nutrient Enhanced, Coastal Ocean Productivity Workshop. Publ. no. TAMU-SG-92-109, Texas Sea Grant College Program, Texas A&M University, College Station, Texas.Google Scholar
  41. Rabalais, N. N., R. E. Turner, and W. J. Wiseman, Jr. 1992b. Distribution and characteristics of hypoxia on the Louisiana shelf in 1990 and 1991, p. 15–20. In Proceedings, Nutrient Enhanced Coastal Ocean Productivity Workshop. Publ. no. TAMU-SG-92-109, Texas Sea Grant College Program, Texas A&M University, College Station, Texas.Google Scholar
  42. Rabalais, N. N., R. E. Turner, W. J. Wiseman, Jr., and D. F. Boesch. 1991. A brief summary of hypoxia on the northern Gulf of Mexico continental shelf: 1985–1988, p. 35–46. In R. V. Tyson and T. H. Pearson (eds.), Modern and Ancient Continental Shelf Anoxia. Geological Society Special Publ. No. 58. The Geological Society, London.Google Scholar
  43. Rabalais, N. N., W. J. Wiseman, Jr., and R. E. Turner. 1994a. Hypoxic conditions in bottom waters on the Louisiana-Texas shelf, p. 50–54. In M. J. Dowgiallo (ed.), Coastal Oceanographic Effects of Summer 1993 Mississippi River Flooding, Special National Oceanic and Atmospheric Administration Report, United States Department of Commerce, National Oceanic and Atmospheric Administration, Coastal Ocean Program, Silver Spring, Maryland.Google Scholar
  44. Rabalais, N. N., W. J. Wiseman, Jr., and R. E. Turner. 1994b. Comparison of continuous records of near-bottom dissolved oxygen from the hypoxia zone of Louisiana. Estuaries 17:850–861.CrossRefGoogle Scholar
  45. Redalje, D. G., S. E. Lohrenz, and G. L. Fahnenstiel. 1994. The relationship between primary production and the vertical export of particulate organic matter in a river-impacted coastal ecosystem. Estuaries 17:829–838.CrossRefGoogle Scholar
  46. Redfield, A. C. 1958. The biological control of chemical factors in the environment. American Scientist 46:205–222.Google Scholar
  47. Rhee, G. Y. 1973. A continuous culture study of phosphate uptake, growth rate, and polyphosphate in Scenedesmus sp. Journal of Phycology 9:495–506.Google Scholar
  48. Round, F. E., R. M. Crawford, and D. G. Mann. 1990. The Diatoms. Biology and Morphology of the Genera. Camrbidge University Press, Cambridge.Google Scholar
  49. Schelske, C. L., D. J. Conley, E. F. Stoermer, T. L. Newberry, and C. D. Campbell. 1986. Biogenic silica and phosphorus accumulation in sediments as indices of eutrophication in the Laurentian Great Lakes. Hydrobiologia 143:79–86.CrossRefGoogle Scholar
  50. Schelske, C. L. and E. F. Stoermer. 1971. Eutrophication, silica depletion, and predicted changes in algal quality in Lake Michigan. Science 173:423–424.CrossRefGoogle Scholar
  51. Sen Gupta, B. K., R. F. Lee, and M. S. May. 1981. Upwelling and an unusual assemblage of benthic foraminifera on the northern Florida continental slope. Journal of Paleontology 55: 853–857.Google Scholar
  52. Sen Gupta, B. K. and M. L. Machain-Castillo. 1993. Benthic foraminifera in oxygen-poor habitats. Marine Micropaleonotology 20:183–201.CrossRefGoogle Scholar
  53. Sen Gupta, B. K., R. E. Turner, and N. N. Rabalais. 1996. Seasonal oxygen depletion in continental shelf waters of Louisiana: Historical record of benthic foraminifers. Geology 24:227–230.CrossRefGoogle Scholar
  54. Shumway, S. E. 1990. A review of the effects of algal blooms on shellfish and aquaculture. Journal of the World Aquaculture Society 21:65–104.CrossRefGoogle Scholar
  55. Simmons, E. G. and W. H. Thomas. 1962. Phytoplankton of the eastern Mississippi delta. Publications of the Institute of Marine Science, University of Texas 8:269–298.Google Scholar
  56. Sklar, F. H. and R. E. Turner. 1981. Characteristics of phytoplankton production off Barataria Bay in an area influenced by the Mississippi River. Comtributions in Marine Science 24:93–106.Google Scholar
  57. Smayda, T. J. 1990. Novel and nuisance phytoplankton blooms in the sea: Evidence for global epidemic, p. 29–40. In E. Graneli, B. Sundstrom, R. Edler, and D. M. Anderson (eds.), Toxic Marine Phytoplankton. Elsevier Science Publishing Co., New York.Google Scholar
  58. Smith, N. P. 1980. On the hydrography of shelf waters off the central Texas Gulf Coast. Journal of Physical Ocenography 10:806–813.CrossRefGoogle Scholar
  59. Tester, P. A. and L. P. Atkinson. 1994. Low salinity water in the Gulf Stream off North Garolina, p. 72–76. In M. J. Dowgiallo (ed.), Coastal Oceanographic Effects of Summer 1993 Mississippi River Flooding, Special National Oceanic and Atmospheric Administration Report, United States Department of Commerce, National Oceanic and Atmospheric Administration, Coastal ocean Program, Silver Spring, Maryland.Google Scholar
  60. Thomas, W. H. and E. G. Simmons. 1960. Phytoplankton production in the Mississippi River Delta, p. 103–116. In F. P. Shepard (ed.), Recent Sediments, Northwest Gulf of Mexico. American Association of Petroleum Geologists, Tulsa, Oklahoma.Google Scholar
  61. Turner, R. E. and N. N. Rabalais. 1991. Changes in Mississippi River water quality this century. Implications for coastal food webs. BioScience 41:140–147.CrossRefGoogle Scholar
  62. Turner, R. E. and N. N. Rabalais. 1994a. Changes in the Mississippi River nutrient supply and offshore silicate-based phytoplankton community responses, p. 147–150. In K. R. Dyer and R. J. Orth (eds.), Changes in Fluxes in Estuaries: Implications from Science to Management. Proceedings of Estuarine and Coastal Sciences Association/Estuarine Research Federation Symposium. International Symposium Series, Olsen & Olsen, Fredensborg, Denmark.Google Scholar
  63. Turner, R. E. and N. N. Rabalais. 1994b. Coastal eutrophication near the Mississippi river delta. Nature 368:619–621.CrossRefGoogle Scholar
  64. Turner, R. E., N. N. Rabalais, and Z.-N. Zhang. 1990. Phytoplankton biomass, production, and growth limitations on the Huanghe (Yellow River) continental shelf. Continental Shelf Research 10:545–571.CrossRefGoogle Scholar
  65. United States Army Corps of Engineers. 1974. Deep draft access to the ports of New Orleans and Baton Rouge. Draft Environmental Statement, United States Army Corps of Engineers, New Orleans District, New Orleans, Louisiana.Google Scholar
  66. Walker, N. D., G. S. Fargion, L. J. Rouse, and D. G. Biggs. 1994. The Great Flood of Summer 1993: Mississippi River discharge studies. Eos, Transactions, American Geophysical Union 75:409,414–415.Google Scholar
  67. Ward, C. H., M. E. Bender, and D. J. Reish (eds.), 1979. The Offshore Ecology Investigation. Effects of oil drilling and production in a coastal environment. Rice University Studies 65:1–589.Google Scholar
  68. Wiseman, W. J., Jr., R. E. Turner, F. K. Kelly, L. J. Rouse, Jr., and R. F. Shaw. 1986. Analysis of biological and chemical associations near a turbid coastal front during winter 1982. Contributions in Marine Science 29:141–151.Google Scholar

Copyright information

© Estuarine Research Federation 1996

Authors and Affiliations

  • Nancy N. Rabalais
    • 1
  • R. Eugene Turner
    • 2
  • Dubravko JustiĆ
    • 2
  • Quay Dortch
    • 3
  • William J. Wiseman
    • 4
  • Barun K. Sen Gupta
    • 5
  1. 1.Louisiana Universities Marine ConsortiumChauvin
  2. 2.Coastal Ecology Institute and Department of Oceanography and Coastal SciencesLouisiana State UniversityBaton Rouge
  3. 3.Louisiana Universities Marine ConsortiumChauvin
  4. 4.Coastal Studies Institute and Department of Oceanography and Coastal SciencesLouisiana State UniversityBaton Rouge
  5. 5.Department of GeologyLouisiana State UniversityBaton Rouge

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