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Gulf of Mexico Research Initiative
Investigating the effect of oil spills on the environment and public health
Gulf of Mexico Research Initiative
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Study author Nancy Rabalais records information as they collect water samples to monitor the hypoxic zone. Photo provided by Rabalais.

Study Finds “Business as Usual” for Hypoxic Zone Following Deepwater Horizon

July 31, 2018

Researchers compared long-term data from low-oxygen (hypoxia) studies to determine if the Deepwater Horizon incident affected the Gulf of Mexico seasonal hypoxic area.

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Study author Hernando P. Bacosa onboard the RV Pelican collecting water samples from the Gulf of Mexico. Photo provided by Zhanfei Liu.

Study Finds Environmental Factors Influence the Selection of Oil-Degrading Microbes

July 24, 2018

Researchers conducted incubation experiments and examined the roles of temperature, nutrients, and initial bacterial community on oil biodegradation. Higher and lower temperatures yielded distinctly different bacterial community compositions, indicating that temperature is a key influencer of bacteria that respond when oil is present.

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Study author Guillaume Novelli deploys the eco-friendly CARTHE drifters, which are designed to measure shallow-depth surface currents. Photo credit: Cédric Guigand.

Study Describes Design and Testing of an Effective Biodegradable Ocean Drifter

July 10, 2018

Scientists detailed how they designed and tested an ocean drifter that tracks and measures shallow-depth (0.60 m) surface currents. The final version, called the CARTHE drifter, is made from a polymer produced by bacteria fed with corn sugar.

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A deep-sea shrimp (Janicella spinicauda). Gulf of Mexico. fish4539 Credit: SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC.

Study Evaluates Short-Term Oil Toxicity in Deep-Sea Crustaceans

June 26, 2018

Researchers conducted 48-hour toxicity experiments on deep ocean crustaceans (200 – 1000 m depth) to determine the impact threshold levels for one polycyclic aromatic hydrocarbon (PAH, 1-methylnaphthalene) under various environmental conditions.

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Researchers lowered a profiling camera on the seafloor (by accident due to the depth sensor not working correctly), which caused a mini resuspension event. The black cylinder in the left corner with two hose clamps is the depth sensor. Image credit: Arne Diercks, ECOGIG

Study Tracks Sediment Resuspension Events in the Northern Gulf of Mexico

June 21, 2018

Researchers identified small- to hurricane-scale resuspension events using time-series data of sinking organic material near the Deepwater Horizon site.

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Current magnitudes are shows at depts. Of (A) 10 m, (B) 1 meter, and (C) 0.05 m. Green dashed lines indicate the “zooming in” progression from A to C. From figure 2 in the study, provided by Nathan Laxague.

Study Finds Currents One Centimeter Below Ocean’s Surface Greatly Affect Material Transport

June 14, 2018

Researchers conducted a first-of-its-kind measurement of the vertical dynamics of water motion near the ocean’s surface in the northern Gulf of Mexico.

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A Seaside Sparrow. Photo by study author Philip Stouffer.

Study Finds Seaside Sparrows Change Food Sources in Response to Environmental Stressors

June 7, 2018

Researchers analyzed the resource use of Seaside Sparrows residing in salt marshes impacted by large-scale disturbances like Deepwater Horizon and Hurricane Isaac to understand the effects on these indicators of ecological change.

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Study Finds Dispersants Reduce VOC Emissions and Increase Airborne Particles with PAHs

May 31, 2018

Researchers conducted laboratory wave tank experiments to investigate how plunging breaking waves affect the concentration of particulate and gaseous emissions from oil slicks.

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Researchers deploy sediment trap instruments in the Gulf of Mexico. Picture provided by Uta Passow.

Study Gives Post-Oil Spill Baseline for Particle Fluxes in the Northern Gulf of Mexico

May 22, 2018

Researchers assessed several years of sediment trap collections near the Deepwater Horizon site, an active natural seep site, and a reference site to understand transport pathways and drivers of sinking particles in deepwater environments (1400 m depth).

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Study author Dr. Christina Pasparakis analyzes different life stages of mahi-mahi embryos under a stereomicroscope. (Photo by Dan DiNicola)

Study Finds Oil, UV Radiation, and Temperature Affect Mahi Survival Processes

May 17, 2018

Researchers conducted exposure experiments with mahi-mahi embryos using oil, ultraviolet (UV) radiation, and temperature to determine how multiple stressors affect their survival. Compared to controls, exposed embryos floating near the ocean’s surface started to sink sooner and at faster rates, which intensified at higher temperatures.

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