Summer hypoxia in the bottom waters of the northern Gulf of Mexico has received considerable scientific and policy attention because of potential ecological and economic impacts from this very large zone of low oxygen and because of the implications for management within the massive Mississippi River watershed. An assessment of its causes and consequences concluded that the almost 3-fold increase in nitrogen load to the Gulf is the primary external driver stimulating the increase in hypoxia since the middle of the last century. Results from three very different models are compared to reach the consensus that large-sclae hypoxia likely did not start in the Gulf of Mexico until the mid-1970s and that the 30% nitrogen load reduction called for in an Action Plant to reduce hypoxia, agreed to by a federal, state, and tribal task force, may not be sufficient to reach the plan’s goal. Caution is also raised for setting resource management goals without considering the long-term consequences of climate variability and change.
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Bierman, Jr.,V. J., S. C. Hinz, D. Zhu, W. J. Wiseman, Jr.,N. N. Rabalais, andR. E. Turner. 1994. A preliminary mass balance model of primary productivity and dissolved oxygen in the Mississippi River plume/inner Gulf Shelf region.Estuaries 17:886–99.
Bierman, Jr., V. J., S. C. Hinz, W. J. Wiseman, Jr., N. N. Rabalais, and R. E. Turner. 2003. Forecasting hypoxia in the Gulf of Mexico: Responses to nutrient loadings from the Mississippi River Basin, p. 91–96.In N. J. Valette-Silver and D. Scavia (eds.), Ecological Forecasting: New Tools for Coastal and Ecosystem Management. NOAA Technical Memorandum NOS NCCOS 1. Silver Spring, Maryland.
Boesch, D. F. 2002. Challenges and opportunities for science in reducing nutrient over-enrichment of coastal ecosystems.Estuaries 25:886–900.
Chapra, S. C. 1997. Surface Water-Quality Modeling. McGraw-Hill, Boston, Massachusetts.
Committee on Environment and Natural Resources (CENR). 2000. Integrated assessment of hypoxia in the Northern Gulf of mexico. National Science and Technology Council, Washington, D.C.
Doering, O. C., F. Diaz-Hermelo, C. Howard, R. Heimlich, F. Hitzhusen, R. Kazmierczak, J. Lee, L. Libby, W. Milon, T. Prato, andM. Ribaudo. 1999. Evaluation of the economic costs and benefits of methods for reducing nitrogen loads to the Gulf of Mexico. Decision Analysis Series, No. 20. NOAA Coastal Ocean Program, Silver Spring, Maryland.
Eadie, B. J., B. A. McKee, M. B. Lansing, J. A. Robbins, S. Metz, andJ. H. Treery. 1994. Records of nutrient-enhanced coastal productivity in sediments from the Lousiana continental shelf.Estuaries 17:754–765.
Faeth, P. andS. Greenhalgh. 2002. Policy synergies between nutrient over-enrichment and climate change.Estuaries 25:869–877.
Goolsby, D. A., W. A. Battaglin, B. T. Aulenbach, andR. P. Hooper. 2001. Nitrogen input to the Gulf of Mexico.Journal of Environmental Quality 30:329–336.
Greenhalgh, S. andP. Faeth. 2001. A potential integrated water quality strategy for the Mississippi River Basin and the Gulf of Mexico.The Scientific World 1:976–983.
Greenhalgh, S. andA. Sauer. 2003. Awakening the dead zone: An investment for agriculture, water quality, and climate change. WRI Issue Brief, World Resources Institute, Washington, D.C.
Justic, D., N. N. Rabalais, andR. E. Turner. 1996. Effects of climate change on hypoxia in coastal waters: A doubled CO2 scenario for the northern Gulf of Mexico.Limnology and Oceanography 41:992–1003.
Justic, D., N. N. Rabalais, andR. E. Turner. 2002. Modeling the impacts of decadal changes in riverine nutrient fluxes on coastal eutrophication near the Mississippi River Delta.Ecological Modelling 152:33–46.
Justic, D., N. N. Rabalais, andR. E. Turner. 2003. Simulated responses of the Gulf of Mexico hypoxia to variations in climate and anthropogenic nutrient loading.Journal of Marine Systems 42:115–126.
LimnoTech Inc. 1995. Estimated responses of water quality on the Louisiana Inner Shelf to nutrient load reductions in the Mississippi and Atchafalaya Rivers. Unnumbered report. U.S. Environmental Protection Agency, Gulf of Mexico Program, Stennis Space Center, Bay St. Louis, Mississippi.
McIsaac, G. F., M. B. David, G. Z. Gertner, andD. A. Goolsby. 2001. Nitrate flux in the Mississippi River.Nature 414:166–167.
McIsaac, G. F., M. B. David, G. Z. Gertner, andD. A. Goolsby. 2002. Relating net N input in the Mississippi River basin to nitrate flux in the lower Mississippi River: A comparison of appraoches.Journal of Environmental Quality 31:1610–1622.
Miller, J. R. andG. L. Russell. 1992. The impact of global warming on river discharge.Journal of Geophysical Research 97:2757–2764.
Mississippi River/Gulf of Mexico Watershed Nutrient Task Force (Task Force). 2001. Action plan for reducing, mitigating, and controlling hypoxia in the Northern Gulf of Mexico. Task Force, Washington, D.C.
Mitsch, W. J., J. W. Day, Jr.,J. W. Gilliam, P. M. Groffman, D. L. Hey, G. W. Randall, andN. Wang. 1999. Reducing nutrient loads, especially nitrate-nitrogen, to surface water, ground water, and the Gulf of Mexico. Decision Analysis, Series No. 19. NOAA Coastal Ocean Office, Silver Spring, Maryland.
Mitsch, W. J., J. W. Day, Jr.J. W. Gilliam, P. M. Groffman, D. L. Hey, G. W. Randall, andN. Wang. 2001. Reducing nitrogen loading to the Gulf of Mexico from the Mississippi River basin: Strategies to counter a persistent ecological problem.BioScience 15:373–388.
National Assessment Synthesis Team. 2001. Climate change impacts on the United States: The potential consequences of climate variability and change. Report for the U.S. Global Change Research program. Cambridge University Press, Cambridge, U.K.
Rabalais, N. N., R. E. Turner, D. Justic, Q. Dortch, andW. J. Wiseman, Jr. 1999. Characterization of hypoxia. Decision Analysis Series. No. 15. NOAA Coastal Ocean Program, Silver Spring, Maryland.
Rabalais, N. N., R. E. Turner, andD. Scavia. 2002. Beyond science into policy: Gulf of Mexico hypoxia and the Mississippi River.BioScience 52:129–142.
Scavia, D., N. N. Rabalais, R. E. Turner, D. Justic, andW. J. Wiseman, Jr. 2003. Predicting the response of Gulf of Mexico hypoxia to variations in Mississippi River nitrogen load.Limnology and Oceanography 48:951–956.
Sen Gupta, B. K., R. E. Turner, andN. N. Rabalais. 1996. Seasonal oxygen depletion in continental-shelf waters of Louisiana: Historical record of benthic foraminifers.Geology 24:227–230.
Turner, R. E. andR. L. Allen. 1982. Bottom water oxygen concentration in the Mississippi River Delta Bight.Contributions in Marine Science 25:161–172.
Turner, R. E. andN. N. Rabalais. 1991. Changes in the Mississippi River water quality this century—Implications for coastal food webs.BioScience 41:140–147.
Turner, R. E. andN. N. Rabalais. 1994. Evidence for coastal eutrophication near the Mississippi River delta.Nature 368:619–621.
Wolock, D. M. andG. J. McCabe. 1999. Estimates of runoff using water-balance and atmospheric general circulation models.Journal of the American Water Resources Association 35:1341–1350.
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Scavia, D., Justic, D. & Bierman, V.J. Reducing hypoxia in the Gulf of Mexico: Advice from three models. Estuaries 27, 419–425 (2004). https://doi.org/10.1007/BF02803534
- Areal Extent
- Nitrogen Load
- Mississippi River Basin
- Hypoxic Zone
- Total Nitrogen Load