Nitrate flux in the Mississippi River

Increased delivery of biologically available nitrogen to estuaries and coastal oceans in recent decades has been linked to eutrophication and seasonal hypoxia in the northern Gulf of Mexico and elsewhere. We have developed a model that accounts for 95% of annual variation in delivery of nitrate to t...

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Bibliographic Details
Published inNature (London) Vol. 414; no. 6860; pp. 166 - 167
Main Authors MCISAAC, Gregory F, DAVID, Mark B, GERTNER, George Z, GOOLSBY, Donald A
Format Journal Article
LanguageEnglish
Published London Nature Publishing 08.11.2001
Subjects
Animal, plant and microbial ecology
Applied ecology
Biological and medical sciences
Ecotoxicology, biological effects of pollution
Fresh water environment
Fundamental and applied biological sciences. Psychology
United States
North America
America
Freshwater environment
Nitrogen fertilization
Oxygen
Environmental factor
Hypoxia
Stream
Nitrates
Water pollution
Multiyear variation
Eutrophication
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Summary:Increased delivery of biologically available nitrogen to estuaries and coastal oceans in recent decades has been linked to eutrophication and seasonal hypoxia in the northern Gulf of Mexico and elsewhere. We have developed a model that accounts for 95% of annual variation in delivery of nitrate to the Gulf of Mexico by the Mississippi River in 1960-98. Retrospective analysis indicates that this nitrate flux could have been reduced by 33% if the use of nitrogen-containing fertilizer in the Mississippi River basin had been cut by 12%.
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ISSN:0028-0836
1476-4687
DOI:10.1038/35102672