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Wildfires are increasing toxic mercury in streams in Idaho, Oregon, Washington, study finds

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Wildfires are increasing toxic mercury in streams in Idaho, Oregon, Washington, study finds


Credit: Pixabay/CC0 Public Domain

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)
retrieved 15 August 2024
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Idaho Chukar Foundation hosts rattlesnake, skunk, and porcupine avoidance training

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Idaho Chukar Foundation hosts rattlesnake, skunk, and porcupine avoidance training


BOISE, Idaho — Sixteen years ago, Drew Whalin’s dog got bitten by a rattlesnake, and ever since, Drew and the Idaho Chukar Foundation have put together training to help dogs and their owners avoid dangerous animals in Idaho.

“I never wanted to go through my dog getting bit by a rattlesnake again,” said Whalin. “The good news is the rattlesnakes we have here are the least toxic, but the bad news is we have more of them.”

WATCH | See these dogs react to real snakes during a training session—

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Idaho Chukar Foundation hosts rattlesnake, skunk and porcupine avoidance training

The Idaho Chukar Foundation hosted its first avoidance training in Julia Davis Park, inviting dog owners to bring out their pooches to learn how to avoid rattlesnakes, skunks, and porcupines using a specific method.

“We do that by using a science that is called operant conditioning,” Whalin explained. “We associate a mild shock stimulation with the dog recognizing the snake and then having the dog owner praise the dog, so it is twofold.”

The foundation uses real snakes during the training sessions, and by the end, the dogs were improving at recognizing the snake and avoiding it.

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The Arguedas family brought their dog Banjo, and they appreciate this public service.

“It would be horrible to have your dog bit or have something happen,” said Gretchen Arguedas. “We have been really thankful to have this over multiple hunting dog seasons, and with multiple dogs. Its been a nice insurance policy that we can get outside and feel safe.”

Getting away from the snake

The skunk and porcupine training uses the same method, and the training also featured a booth with the Idaho Trappers Association, which gave dog owners tips on how to get their dog loose from a trap.

The event also included information on rattlesnake ecology, how important it is to have a plan, and what to do in case your dog gets bitten. Funds raised from the training will be used by the Idaho Chukar Association to improve wildlife habitat in Idaho.

The skunk course

If this piques your interest, the Idaho Chukar Foundation is offering additional training days at Julia Davis Park next Saturday, June 6. For additional event information, click here.

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Idaho’s state park system remains a major draw more than a c…

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Idaho’s state park system remains a major draw more than a c…


The park, which today spans 4,800 acres was made possible in part through the Recreation & Public Purposes Act, which allowed the agency to sell public lands to state and local governments for recreational purposes.

The state park system expanded precipitously in the decades that followed, and today spans 28 state parks, 60,000 acres of land and 2,500 overnight campsites, far from the “embarrassment” Heyburn had once anticipated. It was less than two decades ago, however, the state was considering pulling back on some of its established public sites that had been frequented for decades.

In 2009, when the state was in the throes of the Great Recession, IDPR was at one point being considered to be parted out to other agencies. At the time, Just joined former IDPR director Yvonne Farrell to form the Friends of Idaho State Parks and garner support for the state’s park system — the agency ultimately survived the economic downturn, but not without a more than 80% cut to it budget, Just said.

Engagement in the parks has continued to be elevated since the COVID-19 pandemic, after people in Idaho and across the country were itching to get outside their homes and into the outdoors. In 2020, a record 7.6 million people visited Idaho state parks and IDPR has reported an average of 7.1 million visitors between 2020-2023.

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While serving as a senator on the Idaho Legislature in 2023, Just served as a bill sponsor for an $100 million expansion of IDPR’s budget — the largest in state history, This was followed in 2024 with an allocation of $20 million in funds for deferred maintenance at state parks.

“COVID frankly showed us how much people love the state parks,” Just said. “When they were stuck at home, they got out in the fresh air where they could enjoy themselves and just inundated state parks. Not just here, but everywhere.”

McCandless covers Idaho politics for the Lewiston Tribune, Moscow-Pullman Daily News, Idaho Press of Nampa and Coeur d’Alene Press. He may be contacted at rmccandless@idahopress.com.



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Cattle ‘suffered’ after being shot, left to die on Idaho rangeland, police say – East Idaho News

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Cattle ‘suffered’ after being shot, left to die on Idaho rangeland, police say – East Idaho News


GOODING (Idaho Statesman) — Idaho law enforcement agencies are investigating the killing and mutilation of livestock across southern Idaho in recent weeks, according to a news release that Idaho State Police shared Friday.

The agency said the State Brand Inspector, which verifies livestock ownership through brands, and multiple county sheriff’s offices are investigating incidents of cattle shot and killed in Jerome and Gooding counties. Officials said three cattle deaths have been confirmed as illegal killings, while five others are under investigation.

The news release said the killings happened in “remote grazing areas” and included multiple incidents near Wendell, and cases in Jefferson and Payette counties.

Idaho State Brand Inspector Cody Burlile told the Idaho Statesman in an email that investigators don’t believe the killing of a calf that was found “dead and partially mutilated” near New Plymouth in late April or the killing of a calf in Jefferson County are related to the other cases.

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Killing livestock that are valued at $1,000 or more is a felony under Idaho law.

“This is a serious crime that directly impacts Idaho ranching families and their livelihoods,” Burlile said in the Idaho State Police news release. “These producers invest significant amounts of time, money and effort into caring for their livestock. The losses associated with these incidents are in the thousands of dollars.”

Burlile told the Statesman that five ranchers have reported suspicious cattle deaths, and the three confirmed illegal deaths were each linked to a different ranch.

“The other deaths were suspicious and in near proximity to the confirmed deaths in Gooding County, but we have not been able to positively determine foul play was involved,” Burlile said in an email.

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Officials said some of the cattle were partially butchered, while others were left untouched where they died. They said it appeared some of the animals suffered before they died. Some of the cattle were cows with calves.

“When people hear about livestock being shot, they often think only about financial loss,” Burlile said in the news release. “What they don’t see is the suffering these animals endure, the impact on calves that depend on their mothers, and the effect on the livelihood of those who care for them. These aren’t just property crimes we are investigating.”

Anyone with information related to the killings is urged to contact local law enforcement or the State Brand Inspector at 208-884-7070 or ContactBrands@isp.idaho.gov.

The Idaho Cattle Association is offering a reward for tips that lead to the successful identification and prosecution of the person or people responsible, officials said.

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