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

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Presentation transcript:

Hipoxia en el Golfo de México Nancy N. Rabalais, Ph.D. Executive Director and Professor Louisiana Universities Marine Consortium symposium LATIN AMERICAN AND CARIBBEAN LARGE MARINE ECOSYSTEMS Towards a regional assessment

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

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 (east of the Mississippi River delta) and July (west of the Mississippi River delta), 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.

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

Nutrients Delivered to GoMx Alexander et al &

* Long Island Sound (tons N/yr) * 33% increase since % increase since 1950 Mississippi River Watershed Downing et al * Nutrient Sources Differ by Watershed

Hypoxia in the Gulf of Mexico

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

* BAHIAS Cruise in June 2009 RV ANTEA - IRD Hipoxia - Grijalva-Usumacinta Cuenca < > 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

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