Posts Tagged: wildfire
Wildfire takes toll on mental, physical health of food producers
Farm Bill could support awareness of help available
The people who produce our food need support – especially in the areas of mental and physical well-being – to recover from increasingly widespread wildfire, scientists have found. The federal Farm Bill could help, but it is languishing in Congress (an extension of the previous Farm Bill was passed in late December 2024).
Postdoctoral researcher Natalia Pinzon Jimenez used surveys to hone in on the experiences of ranchers and farmers impacted by wildfire. Pinzon recently earned her Ph.D. at UC Davis and produced her findings with a team that included Leslie Roche, a professor of Cooperative Extension in the Department of Plant Sciences.
The team surveyed more than 500 ranchers and farmers affected by wildfires between 2017 and 2023. Pinzon recently summarized her findings in this research report. She also recently launched a website, Wildfires & Agriculture, based on her findings. Its goal is to help producers become more resilient to fire by providing tools, improving research and effecting policy.
Financial and technical assistance also matter, but are secondary, said the producers who participated in the surveys.
“The No. 1 wildfire impact for ranchers is on their physical and mental health,” said Tracy Schohr, a research team member and livestock and natural resources advisor in Plumas, Sierra, and Butte counties with UC Agriculture and Natural Resources (Schohr earned her master's degree with Ken Tate, also a professor of Cooperative Extension in the department.)
“This underscores the need for future United States Department of Agriculture disaster programs to prioritize physical and mental health and emphasizes the importance of USDA investment in training staff and partners in trauma-informed approaches to aid farmers and ranchers affected by disasters,” Schohr argued.
In addition to being scorched by wildfire, farmers and ranchers are on the front lines of wildfire response, both on their properties and in their communities. When it's not wildfire season, they manage future risks by reducing fuel loads on their properties, installing off-grid systems and water storage, planning for wildfire response and training employees, Pinzon reported.
Need for greater awareness of help available
While producers were optimistic about their chances of recovering from wildfire, Pinzon found they have a limited financial safety net supporting them. Most producers relied on personal savings to recover from significant losses. Small producers, those using organic or sustainable practices, beginning producers, first-generation producers and people renting their land all had fewer resources, including crop insurance.
In addition, 78 percent of farmers and 58 percent of ranchers did not use financial assistance offered through the USDA to cope with disasters, Pinzon reported. Many didn't even know such assistance is available, or they reported the application process was too difficult.
All those pressures led to a quarter of the respondents admitting they had considered shutting down their operations.
Pinzon pointed to the federal Farm Bill as a source for funding greater collaboration between the USDA and on-the-ground organizations such as Cooperative Extension. The aim would be “to raise awareness, expand access to assistance programs and provide science-based solutions for wildfire recovery,” Pinzon recommended.
Surveys lead to more insights
Pinzon's work is part of a larger, statewide effort to use surveys and interviews with ranchers and farmers to understand their needs, direct scientific inquiry and develop solutions to their problems.
The team includes the University of California, UC ANR, federal, state and local agencies, producer organizations and private individuals. The surveys go back to 2011 and were conducted by Roche and a network of colleagues.
Read about California ranchers' response to drought and their needs for staying strong.
Farmers and ranchers: Learn what you can do
You can prepare for wildfire on your land. Get free, online information through Farmer Campus, co-founded by Pinzon with support from the USDA. Start by downloading your Wildfire Preparedness Workbook. It includes practical, hands-on activities to help you get your operation ready to survive a fire.
This article was first published on the UC Davis Department of Plant Sciences news site.
/h3>/h3>/h3>/h3>Lambs grazing on pastures after wildfire show no significant adverse effects
Hopland REC turns 2018 River Fire devastation into research opportunity
The destructiveness of wildfire flames is easy to see, but dangers may lurk in the ashes they leave behind. A group of UC Davis scientists studied lambs at the UC Hopland Research and Extension Center, investigating whether pastures regrown after a wildfire cause toxic metal residues in grazing animals. The results, published in California Agriculture journal, showed that grazing on regrown pastures did not significantly alter the metal content of the lambs' meat and wool. That's good news for ranchers and consumers from a food safety perspective.
In 2018, the River Fire burned six miles north of Hopland, scorching two-thirds of the land at Hopland REC, including areas in its sheep station. Since Hopland REC conducts ecological and agricultural research, they had data and some meat samples from the sheep flock that lived on site before the River Fire occurred.
“A bunch of researchers came together to brainstorm how we could take advantage of this unfortunate event,” said Sarah Depenbrock, assistant professor and agronomist in the Medicine and Epidemiology department of UC Davis School of Veterinary Medicine.
Burning has played a role in agricultural processes for many years, but wildfires in California are creating a new fire landscape that interests researchers like Depenbrock. “The problem, now, is that these big wildfires probably interact with agricultural land differently than routine prescribed burns,” she said.
Large, older plants on lands that have not recently burned may contain high concentrations of metals, sequestered over years of growth. Mercury is an example of a potentially dangerous metal that can be sequestered in living things over time. These metals may be distributed in ash after the vegetation burns so the scientists examined lambs that had grazed on Hopland REC's recently burned pastures, during the first plant regrowth.
Uncertain results raise more questions
The researchers compared meat from lambs that grazed on regrown pastures in 2019, after the River Fire, to frozen meat samples that were collected the year before the fire. Lead, mercury, arsenic, molybdenum, cadmium, beryllium, cobalt and nickel were not detected in any animal samples. There were, however, a few (3 out of 26) samples that tested positive for the non-essential (potentially toxic heavy metals) chromium and thallium in the group grazing after the fire.
Due to the small number of samples testing positive, researchers could not determine statistically if this contamination was associated with grazing the burn regrowth. The concentrations of chromium and thallium found may or may not be potentially toxic, depending on the specific forms and how much meat a person consumes.
Another aspect of the study included testing lambs' wool to determine if it is a good method of judging the mineral content of its meat. “In general, we learned that it wasn't well-correlated with most meat metal content of interest, which is worth knowing. However, because we did not identify many of the non-essential metals of particular toxologic concern, such as lead or mercury, in any animal samples we could not determine if testing wool would be useful for those metals, as they are in other species,” said Depenbrock. She also notes that the wool from animals whose meat tested positive for chromium and thallium, did not test positive for these metals in their wool.
As the challenges in managing wildfires persist, so does the risk of contamination of food products stemming from grazing livestock.
“We didn't get striking evidence that tells us, when there's a fire, it means everything is contaminated with heavy metals,” said Depenbrock. “But it does raise the question that maybe we should be doing a little bit of surveillance to see if this is spurious or common. And we should be finding a way to screen grazing herds.”
Recommendations to manage copper concerns
“It's a very small study, but it was quite interesting to find that copper was actually lower in the postfire grazing group, which makes me wonder,” Depenbrock said.
Diseases associated with copper deficiency are a major concern in sheep. For example, congenital swayback can result in stillbirth or an animal's inability to stand on its own due to incurable changes to the spinal cord. Other adverse effects include reduced growth rate, anemia, wool defects and fiber depigmentation, and osteoporosis with higher risk of spontaneous fractures. Copper excess can also cause serious and sometimes fatal disease.
Many of the forage sources, grazing areas and rangelands in California are copper deficient, while some feed sources have excess copper. Screening and monitoring livestock herds for trace minerals including copper is crucial.
To test for copper, she advises livestock owners to obtain mineral concentrations from the organs of euthanized or dead animals. Samples from the liver and kidney are the most valuable organs to identify a potential problem in the herd. UC Davis Veterinary Medicine's California Animal Health and Food Safety (CAHFS) labs do this testing routinely.
Second, monitor and record mineral supplementation and, third, maintain updated health records to make informed decisions regarding supplementation based on a herd or flock's known problems. For example, if a producer is not accustomed to supplementing copper, Depenbrock highly recommends working with a veterinarian to start out (as there are numerous copper supplement products of varying concentration on the market), to determine a testing or screening plan, and review health records for problems potentially associated with copper.
To read the full text of the study, visit https://calag.ucanr.edu/Archive/?article=ca.2022a0016.
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