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Hipoxia en el Golfo de México Nancy N. Rabalais, Ph.D. Executive Director and Professor Louisiana Universities Marine Consortium

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Presentation on theme: "Hipoxia en el Golfo de México Nancy N. Rabalais, Ph.D. Executive Director and Professor Louisiana Universities Marine Consortium"— Presentation transcript:

1 Hipoxia en el Golfo de México Nancy N. Rabalais, Ph.D. Executive Director and Professor Louisiana Universities Marine Consortium nrabalais@lumcon.edu http://www.gulfhypoxia.net symposium LATIN AMERICAN AND CARIBBEAN LARGE MARINE ECOSYSTEMS Towards a regional assessment

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4 Effects are more far reaching than suspended sediment plume, esp. N & somewhat P New Orleans dominant wind direction Mississippi River Atchafalaya River Hypoxic Area Mississippi River – Gulf of Mexico Ecosystem Continuum

5 Hypoxia-Eutrophication State Waters: Estuaries, Bays, Tidal Reach of Rivers Working with GOMA Nutrient Reduction and Water Quality PITs Hypoxia-Nutrient Data Portal Planning for Increased Monitoring Shelf Waters: Time Series & AUVs LA TXMSAL Mississippi River Atchafalaya River Distribution of bottom-water dissolved oxygen July 18-21 (east of the Mississippi River delta) and July 24-30 (west of the Mississippi River delta), 2011. Data source: NN Rabalais, Louisiana Universities Marine Consortium, and RE Turner, Louisiana State University. Funding source: National Oceanic and Atmospheric Administration, Center for Sponsored Coastal Ocean Research. http://www.gulfhypoxia.net

6 Brown Shrimp Fisheries resources at risk Altered migration Reduced habitat Changes in food resources Susceptibility of early life stages Growth & reproduction The Consequences

7 Nutrients Delivered to GoMx http://water.usgs.gov/nawqa/sparrow/gulf_findings/ Alexander et al. 2008 &

8 * Long Island Sound (tons N/yr) http://dep.state.ct.us/ * 33% increase since 1950 1600% increase since 1950 Mississippi River Watershed Downing et al. 1999 * Nutrient Sources Differ by Watershed

9 Hypoxia in the Gulf of Mexico

10 Land use change around the Grijalva Usumacinta Watershed, (1976-2010) EVALUACIÓN INTEGRAL Y MANEJO DEL GRAN ECOSISTEMA MARINO DEL GOLFO DE MÉXICO INTEGRATED ASSESSMENT AND MANAGEMENT OF THE GULF OF MEXICO LARGE MARINE ECOSYSTEM

11 www.gulfofmexicoproject.org * BAHIAS Cruise in June 2009 RV ANTEA - IRD Hipoxia - Grijalva-Usumacinta Cuenca <1.25 -1.50 -1.75 -2.00 -2.25 -2.50 -2.75 -3.00 -3.25 -3.50 -3.75 -4.00 -4.25 -4.50 -4.75 -5.00 -5.25 -5.50 -5.75 -6.00 -6.25 > 93°00'W92°40'W92°20'W92°00'W91°40'W91°20'W 8°20'N 8°40'N 9°00'N Ciudad Del Carmen Laguna de Terminos Bottom Oxygen BAHIAS Cruise in June 2009 RV ANTEA - IRD

12 The Future Climate Change Ocean Acidification Biofuels Increased Population Increased Agribusiness Increased Atmospheric Deposition LATIN AMERICAN AND CARIBBEAN LARGE MARINE ECOSYSTEMS Towards a regional assessment

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