Wildfires have been burning across Idaho this summer, and their list of harmful impacts is long, from worsening health conditions because of smoke to challenges recovering millions in costs to fight them.
But a recent U.S. Geological Survey has added another bad side effect to the list: the rise of a toxic chemical.
The study, which took place between 2021 and 2022, sampled 57 streams at the beginning of river systems in Idaho, Oregon and Washington for mercury, a chemical that can damage the human nervous system at high concentrations. In both water and sediment from the streams, one-year post-fire, mercury concentrations were higher.
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Concentrations of methylmercury, the most toxic form of mercury that’s made when microbes add carbon to mercury, were also 178% higher in water from burned streams. Insects that filtered stream water or ate debris also had higher levels. The compound becomes dangerous as it accumulates in animals over time and gets absorbed by tissues in the body, according to the World Health Organization.
“There hasn’t been a lot of work done on the effects of wildfire on mercury,” Austin Baldwin, a USGS research hydrologist who led the study, told the Idaho Statesman. “With wildfires increasing in both severity and frequency, there was interest with me and my co-authors on knowing what are the effects.”
Baldwin said that when wildfires come through an area, they burn vegetation, which loosens mercury-containing soil and causes erosion into streams and mercury contamination. More studies would need to be done to understand if mercury levels after wildfires are high enough to be a concern for humans, he added.
Mercury levels likely won’t stay high forever and will taper off with major rainfall or the first snow melt after the fire, Baldwin said.
While the best solution to keep mercury out of streams would be preventing wildfires, Baldwin thinks prescribed burns could help mitigate some of the effects. The USGS study found mercury concentrations went up more in areas where wildfires were worse.
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Prescribed burns, which are small fires set intentionally, can reduce the future risk of high-intensity fires by 64%, according to a study by Columbia and Stanford universities.
“If you can lower burn severities, you can also lower mercury,” Baldwin said.
When people are exposed to methylmercury, it often happens through fish consumption.
The Idaho Department of Health and Welfare’s Fish Consumption Advisory Project regularly tests fish in areas commonly contaminated with mercury. When mercury levels are too high in a species, the state agency issues advisories to avoid eating the species, said Drew Pendleton, the state toxicologist.
Many of the areas that cause fish advisories in Idaho are related to mining, and Pendleton is not “too concerned” about mercury increases from the wildfires. But the research could help inform the state on future sites for testing, he said.
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Pendleton recommends visiting the Center for Disease Control and Prevention and Health and Welfare websites to check for advisories on mercury exposure and learn the best methods to stay safe.
2024 The Idaho Statesman. Distributed by Tribune Content Agency, LLC.
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Wildfires are increasing toxic mercury in streams in Idaho, Oregon, Washington, study finds (2024, August 15)
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GARDEN CITY – A Boise-area girl is competing in the 2026 Junior Ranger Competition, and she needs your vote to advance.
Eleven-year-old Cali Lindsay of Garden City is currently in the top 10 in her age group. The first place contestant in each group will advance to the semi-finals, which will wrap on July 17.
The final round concludes on July 24. The winner will be awarded $20,000 and be featured on the cover of Ranger Rick Magazine. They’ll also win a trip with Jeff Corwin.
Cali’s mom, Emily Edginton, tells EastIdahoNews.com how the competition works.
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“You’re allowed one free vote every 24 hours. People can also pay (to vote),” Edginton says. “The contestants have challenges every week to learn about animals and share what they’ve learned. People vote for the answer they like best. If you have enough votes, you move to the next round.”
Cali needs to secure enough votes by Thursday in order to advance to the next round.
The competition is a fundraiser for the National Wildlife Federation, the largest private, nonprofit conservation education and advocacy organization in the United States.
Edginton says they recently moved to Idaho from San Bernardino, California. Her daughter acquired a love of wildlife living in Lytle Creek, a community near the San Gabriel Mountains and San Bernardino National Forest.
“She’s already like a junior ranger. We picked up trash (in the forest) for fun,” Edginton says. “We try to keep it clean because we get a lot of visitors up there in the summertime and they trash the place. It affects the animals.”
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Edginton says they moved to Idaho in February to be closer to family.
She’s grateful her daughter can be part of what she feels is a great cause, and hopes to see her advance, and even win the tournament.
“It’s a good cause, plus it’s a learning experience,” says Edginton.
To vote for Cali or learn more, click here.
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JACKSON, Wyo. — Springtime conjures images of adorable baby animals. Unfortunately, sometimes well-meaning humans feel compelled to interfere with Mother Nature by “rescuing” baby animals who appear to be alone.
The Idaho Department of Fish and Game (IDFG) issued a spring reminder discouraging people from intervening when they assume a wild animal is lost, abandoned or orphaned.
“While these folks typically mean well, the sad reality is they are often doing more damage than good when they intervene — and typically, mom was not far away to begin with,” IDFG shared in a press release.
“Here’s the hard truth,” the agency wrote. “Animal parents will periodically leave their young for an extended period of time for a myriad of reasons, whether it’s to search for food, to rest or to divert attention from their vulnerable offspring, especially if they sense danger. When it comes to wildlife babies, wildlife mothers know best.”
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In short, in an encounter with a lone duckling, gosling, deer fawn, baby bird, red dog or moose calf, do not disturb it. Instead, contact the state’s wildlife agency to report it. In Jackson, call the Wyoming Game and Fish Department at (307) 733-2321. In Idaho, reach IDFG at (208) 525-7290.
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