Presentation on theme: "OTHER COASTAL WATERS ISSUES Gulf of Mexico HypoxiaHarmful Algae Blooms."— Presentation transcript:
OTHER COASTAL WATERS ISSUES Gulf of Mexico HypoxiaHarmful Algae Blooms
aka The Dead Zone THE GULF OF MEXICO HYPOXIA ISSUE
Dead Zone Keeps Getting Bigger By Mark Schleifstein The annual dead zone along Louisianas coast has grown to record size this summer
Hypoxia = Low Oxygen (<2 ppm ) Hypoxia = Low Oxygen (<2 ppm ) Anoxia = No oxygen Anoxia = No oxygen WHAT IS HYPOXIA?
Nitrate-nitrogen is a major contributor to the hypoxic zone in the Gulf of Mexico. It is washed from fields to drainage ditches to streams, which feed into rivers and, ultimately, the Gulf of Mexico. Just as it helps crops grow on land, the nutrients also helps algae grow in water. Unfortunately, when the algae start to die and decompose, the oxygen in the water is depleted, creating an area that cant support most marine life. GULF OF MEXICO HYPOXIA Agricultural Research magazine, October 2002
7,778 sq. miles For Illustration Only Based on Data From N. Rabalais, LUMCON
1,750 sq. miles For Illustration Only Based on Data From N. Rabalais, LUMCON
8,006 sq. miles For Illustration Only Based on Data From N. Rabalais, LUMCON
8,500 sq. miles For Illustration Only Based on Data From N. Rabalais, LUMCON
For Illustration Only Based on Data From N. Rabalais, LUMCON
HYPOXIC AREA IN THE GULF OF MEXIC0 15 No data Data from N. Rabalais, LUMCON
FINAL HYPOXIA ACTION PLAN – January 2001 Voluntary Approach to Reduce Nutrient Discharge to Gulf
Coastal Goal: By the year 2015, subject to the availability of additional resources, reduce the 5- year running average extent of the Gulf of Mexico hypoxic zone to less than 1,930 square miles through implementation of specific, practical, and cost-effective voluntary actions by all States, Tribes, and all categories of sources and removals within the Mississippi/Atchafalaya River Basin to reduce the annual discharge of nitrogen into the Gulf.
Goal by 2015 15 No data HYPOXIC AREA IN THE GULF OF MEXIC0 Data from N. Rabalais, LUMCON
Passed by Congress in 1998 Inter-Agency Task Force on Harmful Algal Blooms and Hypoxia National Assessment on HAB National Assessment on Hypoxia Assessment AND Plan for Hypoxia in the Gulf of Mexico Harmful Algal Bloom and Hypoxia Research and Control Act