Thursday, June 21, 2018
News Roundup

Study finds dispersants did not help oil degrade in BP Deepwater Horizon spill

WASHINGTON — The chemical sprayed on the 2010 BP oil spill may not have helped crucial petroleum-munching microbes get rid of the slick, a new study suggests.

And that leads to more questions about where much of the Deepwater Horizon oil spill went. If the new results are true, up to half the oil can't be accounted for, said the author of a new study on the spill in the Gulf of Mexico.

After the 172 million gallon spill, the chemical dispersant Corexit 9500 was applied by airplane on the slick to help it go away and help natural microbes in the water eat the oil faster. The oil appeared to dissipate, but scientists and government officials didn't really monitor the microbes and chemicals, said University of Georgia marine scientist Samantha Joye.

5 YEARS AFTER SPILL: Gulf of Mexico is resilent, but scarred

So Joye and colleagues recreated the application in a lab, with the dispersant, BP oil and water from the gulf, and found that it didn't help the microbes at all and even hurt one key oil-munching bug, according to a study published Monday in the journal Proceedings of the National Academy of Sciences.

"The dispersants did a great job in that they got the oil off the surface," Joye said. "What you see is the dispersants didn't ramp up biodegradation."

In fact, she found the oil with no dispersant "degraded a heckuva lot faster than the oil with dispersants," Joye said.

Joye's team chronicled nearly 50,000 species of bacteria in the gulf and what they did to the water with oil, and water with oil and dispersant.

RELATED: Despite concerns, dispersant use continued on gulf oil spille

One of the main groups of oil munchers are fat little sausage-shaped bacteria called marinobacters, Joye said. They eat oil all the time and comprise about 3 percent of the bacteria in normal water. But when there's oil, they eat and multiply like crazy until they are as much as 42 percent of the bacteria, Joye said.

But when the dispersant was applied, they didn't grow. They stayed around 3 percent, Joye said.

Instead, a different family of bugs called colwellia multiplied more, and they don't do nearly as good a job at munching the oil, Joye said. She theorized that for some reason the dispersant and marinobacters just don't work together.

So if the oil wasn't degraded by the bacteria, the question remains: Where did it go? Joye guesses it might still be on the floor of the gulf.

Outside scientists Jeff Chanton and Ian MacDonald of Florida State University said the study seemed to make sense. Chanton called the results important and surprising.

The National Oceanic and Atmospheric Administration welcomed the study and will evaluate to determine how well dispersants work in the future, said agency spokeswoman Keeley Belva.

Comments
The Daystarter: CareerSource used credit cards to boost hiring totals; report says Winston suspension coming; Hedman wins Norris Trophy; get ready for Pride

The Daystarter: CareerSource used credit cards to boost hiring totals; report says Winston suspension coming; Hedman wins Norris Trophy; get ready for Pride

Catching you up on overnight happenings, and what to know today.• Today is also the official start of summer, not that anyone will be able to tell. It will be hot and muggy with just a 30 percent chance of rain heading into Friday, according to 10We...
Updated: 1 hour ago
Rays journal: 7 pitches, 3 straight homers prove too much in loss to Astros

Rays journal: 7 pitches, 3 straight homers prove too much in loss to Astros

HOUSTON — The Rays were engaged in a third straight tight, go-either-way battle with the defending champ Astros on Wednesday.Until they were not.A brutal seven-pitch sequence by starter Nathan Eovaldi changed everything, as he gave up three con...
Updated: 5 hours ago
Romano: Intrigue behind all those manicured lawns

Romano: Intrigue behind all those manicured lawns

I’ve always thought homeowners associations had a lot in common with cops.People love to complain about them and often accuse them of abusing their power. And yet as soon as a neighbor paints his house a hot shade of fuchsia, you’re screaming for the...
Updated: 12 hours ago
Daniel Ruth: Florida should consider taking back its outsourced foster care services

Daniel Ruth: Florida should consider taking back its outsourced foster care services

We hear a great deal about how government is the source of all evil, a wasteful, incompetent coven of lazy paper-pushing bureaucrats.That is why the heavens open and the angels sing and all is right with the world whenever we can wrest away various s...
Published: 06/21/18
A tight supply cuts into Tampa Bay home sales while prices keep rising

A tight supply cuts into Tampa Bay home sales while prices keep rising

Tampa Bay’s two largest counties showed anemic home sales in May as prices continued to rise due to a tight supply. In Pinellas, sales of single-family home plunged nearly 12 percent from the previous May, the second-worst showing in a year. P...
Updated: 15 minutes ago
Could Lucky’s Market move in to Clearwater’s old Albertsons?

Could Lucky’s Market move in to Clearwater’s old Albertsons?

Lucky’s Market is considering a move in to the old Albertsons box space in Clearwater, according to preliminary plans filed with the city. Lucky’s master broker, Rick Lewellyn, was listed on an agenda as discussing renovating the existing property wi...
Updated: 1 hour ago
Clearwater wants $40 million from the county for a stadium. But there’s not $40 million to give.

Clearwater wants $40 million from the county for a stadium. But there’s not $40 million to give.

CLEARWATER —The city’s proposed $79.7 million overhaul of the Philadelphia Phillies’ spring training facilities depends on getting $40 million in bed taxes from Pinellas County.But records show even if county officials wanted to bankroll the Phillies...
Updated: 1 hour ago
Police: Couple leased someone else’s home to 15 families at same time

Police: Couple leased someone else’s home to 15 families at same time

LARGO — Vanessa Rodriguez thought she found the right house for her three kids, in the right neighborhood, for the right rent. She signed the lease for April 30, sent a $2,300 money order and planned to move in June 1.Then the delays started. She sai...
Updated: 1 hour ago
Rays see the results of keeping a good, young core group together

Rays see the results of keeping a good, young core group together

HOUSTON — The Rays saw a lot on the weeklong trip that ended with Wednesday's game against that Astros, beyond the street hustlers prowling in Times Square and the urban cowboys and girls parading through H-town.There was an impressive debuting...
Updated: 7 hours ago
Kevin Knox poised to become Tampa Bay’s highest NBA draft pick

Kevin Knox poised to become Tampa Bay’s highest NBA draft pick

Kevin Knox Sr. was watching the NFL draft 24 years ago when the phone rang. Buffalo coach Marv Levy was on the other line."Marv said they were taking me," said Knox Sr., a standout receiver at FSU.Soon after, Knox Sr. saw his name scroll across ESPN'...
Updated: 7 hours ago