Chemical dispersants may affect natural communities of oil-degrading bacteria after spills

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A NASA satellite image shows the spread of oil in the Gulf of Mexico after the 2010 Deepwater Horizon disaster.

Lab tests show nuanced response to application of oil dispersant chemicals

Staff Report

Lab tests suggest that more thought must be given to how dispersant chemicals are used during and after an oil spill. In some cases, the combination of dispersants and oil may actually inhibit microorganisms that can break down hydrocarbons, according to marine scientists. Continue reading

Study documents high rate of reproductive failure in dolphins hit by Deepwater Horizon oil spill

Impacts of oil pollution expected to affect Barataria Bay populations for a long time

Dolphin Y01 pushes a dead calf in March, 2013. This behavior is sometimes observed in female dolphins when their newborn calf does not survive. Credit Louisiana Department of Wildlife and Fisheries

A dolphin pushes a dead calf in March, 2013. This behavior is sometimes observed in female dolphins when their newborn calf does not survive. Photo courtesy Louisiana Department of Wildlife and Fisheries.

Staff Report

There’s already a wealth of research showing that the Deepwater Horizon oil disaster in the Gulf of Mexico was very bad for coastal dolphins. One study, for example, showed dolphins in Barataria Bay exposed to BP’s oil suffered lung disease and hormone deficiencies.

In a report released this week, a team of researchers led by National Ocean and Atmospheric Administration scientists is reporting a high rate of reproductive failure in dolphins exposed to the 2010 spill. The biologists monitored bottlenose dolphins in heavily-oiled Barataria Bay for five years following the spill. Continue reading

Environment: EPA eyes new rules for oil spill dispersants

Public comment sought on proposed standards

Dispersant being applied to the Gulf of Mexico.

Dispersant being applied to the Gulf of Mexico.

Staff Report

FRISCO — When BP’s failed Deepwater Horizon drilling rig spewed millions of gallons of crude oil in the Gulf of Mexico nearly five years ago, the emergency response included the massive use of oil dispersants, chemicals meant to break up potential oil slicks before they reached the shoreline. Continue reading

Environment: $627 million restoration plan finalized to repair some of the damage from the Deepwater Horizon disaster

Barrier islands, shorelines, dunes, underwater grasses and oyster beds targeted for restoration

A NASA satellite image shows the oil slick from the Deepwater Horizon disaster spreading across the northern Gulf of Mexico in late May, 2010.

A NASA satellite image shows the oil slick from the Deepwater Horizon disaster spreading across the northern Gulf of Mexico in late May, 2010.

Staff Report

FRISCO — Nearly four years after BP’s Deepwater Horizon drilling operation disastrously failed and spewed millions of gallons of oil into the Gulf of Mexico, NOAA and its partners have finalized a $627 million restoration plan. The formal record of decision released last week authorizes 44 projects to restore barrier islands, shorelines, dunes, underwater grasses and oyster beds.

This announcement marks the largest suite of Gulf early restoration projects selected thus far in the wake of the 2010 oil spill. The projects aim to address a range of injuries to natural resources and the subsequent loss of recreational use. Details of restoration efforts are outlined in the Final Programmatic and Phase III Early Restoration Plan and Early Restoration Programmatic Environmental Impact Statement. Continue reading

Study: Exposure to crude oil from the Deepwater Horizon disaster causes swimming deficiencies in juvenile mahi mahi

Evidence is mounting that BP’s oil harmed millions of large fish

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Crude oil spreads across a wide swath of the Gulf of Mexico during the 2010 Deepwater Horizon oil disaster.

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By Summit Voice

FRISCO — Along with fouling beaches and wetlands along the Gulf Coast, the 2010 Deepwater Horizon oil spill also had profound impacts on the open ocean and deep sea environment. The four million barrels of crude oil that spewed into the Gulf of Mexico from BP’s failed oil drilling operation potentially exposed millions of fish and other ocean organisms to highly toxic compounds.

That includes many commercially and ecologically important open-ocean fish species such as bluefin and yellowfin tunas, mahi mahi, king and Spanish mackerels. In one of the most recent followup studies on the impacts of the spill, researchers with the University of Miami Rosenstiel School of Marine and Atmospheric Science found that exposure to the crude oil resulted in decreased swimming performance in young mahi mahi. Continue reading

Study documents ‘heartbreak’ after Gulf oilspill

Former Breckenridge resident Andy Cook, who owned and operated Ma's Po Boy restaurant on Park Avenue, cleans a yellowfin tuna he caught in the rich fishing waters near the mouth of the Mississippi River, just off Venice, Louisiana.

Former Breckenridge resident Andy Cook cleans a yellowfin tuna he caught in the rich fishing waters at the mouth of the Mississippi River near Venice, Louisiana. bberwyn photo.

Exposure to PAHs disrupts basic cellular function of heart muscles

By Summit Voice

FRISCO — When BP’s failed Deepwater Horizon drill rig spewed millions of gallons of oil into the Gulf of Mexico, scientists immediately began documenting impacts to natural resources, finding dead corals on the seafloor, sick dolphins in Barataria Bay and remnant oil in the splash zone along Florida beaches.

Even low levels of oil pollution can damage the developing hearts of fish embryos and larvae, reducing the likelihood that those fish will survive. Scientists have known of this effect for some time, but the underlying mechanism has remained elusive.

But recent research by scientists with NOAA and Stanford University, shows how oil-derived chemicals disrupt the normal functioning of the heart muscle cells of fish. The findings, published in the Feb. 14 issue of Science, describe how toxic oil-based chemicals disrupt cardiac function in young bluefin and yellowfin tuna by blocking ion channels in their heart muscle cells. Continue reading

Environment: Dolphins hit by Deepwater Horizon spill are suffering from lung disease and hormone deficiencies

‘”I’ve never seen such a high prevalence of very sick animals …”

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Oil from the Deepwater Horizon disaster is making dolphins very ill.

By Summit Voice

FRISCO — Dolphins exposed to heavy doses of oil from the Deepwater Horizon disaster are experiencing lung disease at five times the rate of dolphin populations in other areas, federal researchers reported in a new study published this week. The scientists also found that 25 percent of the Barataria Bay dolphins were significantly underweight and the population overall had very low levels of adrenal hormones, which are critical for responding to stress.

“I’ve never seen such a high prevalence of very sick animals — and with unusual conditions such as the adrenal hormone abnormalities,” said lead author Dr. Lori Schacke, who announced similar findings in March 2012. Continue reading

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