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UAF-led team uncovers plant remediation effects on petroleum contamination

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UAF-led team uncovers plant remediation effects on petroleum contamination


Chris Kasanke, left, and Mary-Cathrine Leewis were part of the UAF research team led by microbiology professor Mary Beth Leigh. Courtesy of Mary-Cathrine Leewis

Fairbanks, Alaska (UAF) – Initial choices about fertilization and grass seeding could have a long-lasting effect on how plants and their associated microbes break down pollution in petroleum-contaminated soils, a research team led by a University of Alaska Fairbanks professor recently reported.

Microbiology professor Mary Beth Leigh and the team found that planting grasses or adding fertilizer, or a combination of both, to a contaminated site had surprisingly persistent effects on the microbes associated with local vegetation.

The study, recently published in the journal Microbiology Spectrum, indicates that an even greater importance should be placed on initial phytoremediation strategies— the use of plants to restore environments contaminated by pollutants.

The study is based on previous U.S. Army Corps of Engineers research at a petroleum-contaminated area near Fairbanks, Alaska.

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The previous research began in 1995, when scientists created test plots of petroleum-contaminated soil. On some plots, they planted grass. On others, they added fertilizer to the soil. Some plots got both grass and fertilizer and others got no treatment.

The site was no longer monitored after the initial three-year study but, in 2011, the UAF team revisited the site to examine long-term progress. By that time, the contamination could no longer be detected and native species such as white spruce, fireweed, yarrow, willow, blue grass, poplar, buffalo berry, birch and clover had replaced the originally planted grasses.

Three years later, the team took additional samples to test for microbes in each plot. Unexpectedly, the team found that the microbes varied from plot to plot depending on the initial mix of fertilizer and grass, rather than on the types of native species that had moved in.

Since microbes, rather than plants, are responsible for breaking down petroleum, these differences could improve the phytoremediation process. With further study, scientists could strategize ways to make phytoremediation more effective by using plant and fertilizer combinations that encourage petroleum-biodegrading microbes to thrive.

“The jury is out on exactly which plant and fertilizer treatments would be the most effective from the start,” Leigh said. “That is one of the things we are testing in a project at another long-term monitoring site.”

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Crude oil and diesel pollution often threaten ecosystems in rural sub-Arctic areas, Leigh noted.

“Phytoremediation could be an important tool in the toolbox of rural communities that experience soil contamination with diesel fuel,” said Leigh, who is with the UAF Institute of Arctic Biology. “Giving communities the best advice on how to mitigate contamination in an affordable way, such as by using local plants and their associated microbes, has the potential to significantly empower Alaska Native communities in remote areas whose ecosystems are threatened by petroleum pollution.”

Rodney Guritz, a former student of Leigh’s and the owner and principal chemist of Arctic Data Services, compiled the chemical analysis for the study.

Guritz sees the potential for practical applications of the new findings in industry.

“In light of climate change, we urgently need to shift from dig, haul and burn, and I see phytoremediation as an important part of this needed shift,” he said.

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The study has implications for phytoremediation strategies worldwide, according to collaborator Ondrej Uhlik, of the University of Chemistry and Technology, Prague, in the Czech Republic.

“The implications for reinvigorating previously contaminated areas for multi-use purposes are huge in the Czech Republic, and also for Alaskan communities that depend on fragile ecosystems,” Uhlik said. “Moving forward, it’s exciting to think about reclaiming land to allow communities to thrive and not have to abandon land or live with toxins.”

 



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Alaska

Western Alaska storm and southerly flow drives warmth back into the state

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Western Alaska storm and southerly flow drives warmth back into the state


ANCHORAGE, Alaska (KTUU) – Gusty winds and heavy snow has begun to spread into Western and Southwest Alaska, with a surge of warmer air. Temperatures in Southwest Alaska is already 10 to 35 degrees warmer than yesterday morning. This warmth will spread across the rest of the state through the weekend, with some of the most pronounced warmth along the Slope. We’ll see many areas this weekend into next week remaining well-above average.

SOUTHCENTRAL:

Temperatures are slowly warming across Southcentral, with many areas seeing cloud coverage increasing. While we could see some peeks of sunshine today, most locations will see mostly cloudy conditions. While we can’t rule out light flurries for inland locations, most of the precipitation today will occur near the coast. Snow looks to be the primary precipitation type, although later this evening a transition to rain or wintry mix will occur. This comes as temperatures quickly warm across Southcentral.

We’ll see highs today in the upper 20s and lower 30s for inland areas, while coastal regions warm into the 30s and 40s. The southerly flow aloft will remain with us for several days, pumping in the warmth and moisture. As a result, Kodiak could see over an inch of rain today, with gusty winds.

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While most of the precipitation this weekend remains near the coast, inland areas will see the best chance for wintry mix Sunday into Monday. Little to no accumulation is expected.

The key takeaways for this weekend, is snow transitioning to rain, with some gusty winds likely for parts of Southcentral this weekend.

SOUTHEAST:

Another fairly quiet day is expected across Southeast today, outside of some light snow near Yakutat. We’ll see a mix of sun and clouds with temperatures remaining on the cooler side. Parts of the Northern Panhandle may stay in the upper 20s today. The stretch of quiet weather will stay with us through the first half of Saturday, followed by an increase in precipitation and winds. This upcoming system may bring some heavy snowfall to Southeast, so be prepared for that potential this weekend. Temperatures warm into next week, back into the upper 30s and lower 40s for many areas.

INTERIOR:

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While temperatures this morning have bottomed out as low as -30 near Fort Yukon, temperatures will warm into the weekend. A wind advisory for the Alaska Range goes into effect at 9 Friday morning, where winds up to 60 mph will warm the Interior. Temperatures today for many locations will warm into the single digits, with some of the greatest warming arriving Saturday through next week. It’s likely we’ll spend most of next week with temperatures in the 20s and 30s, with the warmest locations near the Alaska Range. While we will largely stay dry, there is a chance for some light snow arriving Sunday night into Monday.

SLOPE/WESTERN ALASKA:

Temperatures will remain slightly above average for parts of the Slope today, with warming winds to build into the Slope this weekend. This comes as our area of low pressure in the Bering Sea continues to move farther north. Be prepared for gusty easterly winds along the Slope, leading to blowing snow and reduced visibility. We’ll see temperatures quickly warm well above average, with highs climbing into the 20s and 30s along the Slope into next week. While some snow is possible through the weekend, the heaviest activity will occur for the Brooks Range. We’ll see the potential for 4 to 12 inches of snowfall, with the highest amounts occurring along the southern slopes of the Brooks Range near Kobuk Valley. Winds could gusts as high as 45 mph, leading to greatly reduced visibility.

Heavy snow is impacting Western and Southwest Alaska this morning, with winds gusting up to 50 mph. Numerous winter weather alerts, as well as a coastal flood advisory is in effect. The heaviest snow will fall for the Seward Peninsula and east of Norton Sound, where up to a foot or more of snow is to be expected. The heaviest amounts will fall today, with the activity set to lighten up through Sunday. In addition to the snow, gusty winds will lead to areas of blowing snow. Visibility could be reduced down to less than half a mile at times. As southerly flow continues to pump in warmth, we’ll see a transition from snow to rain later today into Saturday for parts of Southwest Alaska.

ALEUTIANS:

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Gusty winds and heavy rain will fall through the Aleutians today, where up to .75″ of rain is possible. As the area of low pressure moves north, we’ll see a new low form just south of the Eastern Aleutians. This will lead to additional rain and winds into the weekend. Winds could gusts upwards of 50 mph through the Eastern Aleutians and through the Alaska Peninsula. With ridging to our east, more rain and winds remain with us into early next week. There is the potential that the Pribilof Islands see a return to snow Sunday, as colder air moves into the Bering Sea.

OUTLOOK AHEAD:

Well above average warmth will stay with us as we close out January. While one more short-lived cold snap is possible, we may have to wait until February before we tap into warmer conditions. Temperatures through the close of January will keep average monthly temperatures 5 to 12 degrees above average for much of the state. The overall trend still favors a wetter pattern, although with warmer weather the southern parts of the state will favor more rain or a mixed bag of precipitation.

Have a wonderful and safe holiday weekend.

See a spelling or grammar error? Report it to web@ktuu.com

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Alaska governor, ally of Trump, will keep flags at full-staff for Inauguration Day • Alaska Beacon

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Alaska governor, ally of Trump, will keep flags at full-staff for Inauguration Day • Alaska Beacon


Alaska will join several other Republican-led states by keeping flags at full-staff on Inauguration Day despite the national period of mourning following President Jimmy Carter’s death last month.

Gov. Mike Dunleavy announced his decision, which breaks prior precedent, in a statement on Thursday. It applies only to flags on state property. Flags on federal property are expected to remain at half-staff.

Flags on state property will be returned to half-staff after Inauguration Day for the remainder of the mourning period.

The governors of Indiana, Idaho, Iowa, Texas, Florida, Tennessee, Oklahoma, North Dakota, Nebraska, Montana and Alabama, among others, have announced similar moves. 

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U.S. Speaker of the House Mike Johnson, a Republican from Louisiana, said on Tuesday that flags at the U.S. Capitol would remain at full-staff on Inauguration Day. 

Their actions follow a statement from President-elect Donald Trump, who said in a Jan. 3 social media post that Democrats would be “giddy” to have flags lowered during his inauguration, adding, “Nobody wants to see this, and no American can be happy about it. Let’s see how it plays out.”

Dunleavy is seen as a friend of the incoming president and has met with him multiple times over the past year. Dunleavy and 21 other Republican governors visited Trump last week in Florida at an event that Trump described as “a love fest.”

Since 1954, flags have been lowered to half-staff during a federally prescribed 30-day mourning period following presidential deaths. In 1973, the second inauguration of President Richard Nixon took place during the mourning period that followed the death of President Harry Truman. 

Then-Gov. Bill Egan made no exceptions for Alaska, contemporary news accounts show, and no exception was made for Nixon’s inauguration in Washington, D.C., either. 

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A spokesperson for Dunleavy’s office said the new precedent is designed to be a balance between honoring the ongoing mourning period for former President Jimmy Carter and recognizing the importance of the peaceful transition of power during the presidential inauguration. 

“Temporarily raising the flags to full-staff for the inauguration underscores the significance of this democratic tradition, while returning them to half-staff afterward ensures continued respect for President Carter’s legacy,” the spokesperson said.

GET THE MORNING HEADLINES.

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Federal disaster declaration approved for Northwest Alaska flooding

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Federal disaster declaration approved for Northwest Alaska flooding


ANCHORAGE, Alaska (KTUU) – President Joe Biden announced the approval of federal disaster assistance on Thursday for recovery efforts in areas that sustained damage from flooding and storms in October 2024.

Those areas include the Bering Strait Regional Educational Attendance Area (REAA) and the Northwest Arctic Borough area where many structures were damaged by a severe storm from Oct. 20-23, 2024.

Jerry Jones and his two children were rescued Wednesday after being stranded overnight on the roof of their flooded cabin about 15 miles north of Kotzebue during a large storm impacting Western Alaska.(Courtesy of Jerry Jones)
Kotzebue Flooding
Kotzebue Flooding(Michelle Kubalack)

In a press release, FEMA announced that federal funding is available on a cost-sharing basis for emergency work to the state of Alaska, tribal and eligible local governments, and certain private nonprofit organizations.

The announcement comes just a few days after Biden released the major disaster declaration approval for the August Kwigillingok flooding.

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