How Much Sugar Intake Is Actually Safe?
Nicolette Hahn Niman, author of Righteous Porkchop, just coined a new catchphrase that ought to go viral: “Sugar is NOT just an empty calorie.”
Her statement contradicts the notion we’ve had for years that the worst thing about sugar is its lack of nutrients. Either you’re eating sugar in addition to all of the calories you need to stay healthy, or you’re eating it instead of them. In the former case, you’re getting too many calories; in the latter, you’re getting too few nutrients. This idea is so dominant it was recently cited in an anti-sugar op-ed in the Guardian.
Photo courtesy of Shutterstock
Even if that was the case, we’re eating too much sugar. Or, more specifically, too much added sugar. Sugars that are naturally present in whole foods like fruit are okay; it’s the sugar added to whole foods that we must worry about. Previously, the World Health Organization (WHO) said we should limit consumption of added sugars to 10 percent of calories. Even then, more than seven in 10 Americans ate too much sugar. On average, about 15 percent of our calories came from added sugars.
But now WHO is considering cutting its recommendation in half. That means limiting sugar consumption to five teaspoons, the amount found in half a can of soda. The American Heart Association has long recommended that women limit added sugars to six teaspoons and men stick with nine or less. (For those looking for a loophole, this means all added sugars, including so-called healthier sweeteners like maple syrup, agave, honey or even fruit juice.)
Niman was examining the health impacts of sugar at the same time as WHO. In researching and writing her latest book, she dug into studies that found evidence sugar does more than just lack nutrients. “The sugar is going to actually damage your body. It’s not just that you’re not going to get the nutrients,” she said.
The link between sugar and disease is not a new one. Decades ago, nutrition professor John Yudkin wrote a book called Pure, White, and Deadly in which he posited that sugar was the culprit behind heart disease and type 2 diabetes. The food industry fought back. This was the era of lowfat, not low sugar. (In his book, Yudkin even quotes a sugar industry advertisement claiming that sugar makes you thin. Go figure that out.)
The general term "sugar" can mean any number of things. Table sugar, or sucrose, is composed of a glucose molecule bonded to a fructose molecule. Glucose is what plants make during photosynthesis and it’s half as sweet as table sugar. Fructose, naturally found in honey and many fruits, is 70 percent sweeter than table sugar.
On your tongue, you taste a difference in sweetness between glucose and fructose. Once in your body, the difference continues. Glucose is metabolized by every cell in your body. After you eat, your blood glucose levels rise, and your body releases insulin. The insulin helps your muscles, fat and liver absorb the glucose, decreasing your blood sugar. Levels of another hormone, leptin, also rise. Leptin regulates your appetite; once you’ve eaten and your body has plenty of fuel to keep going, leptin tells you to stop. Another hormone, ghrelin, decreases. Ghrelin stimulates your appetite, and after you’ve eaten, it’s already done its job.
Fructose, on the other hand, is only metabolized by your liver. The title of a 2004 study says it all: “Dietary fructose reduces circulating insulin and leptin, attenuates postprandial suppression of ghrelin, and increases triglycerides in women.” In other words, after you eat fructose, your body never gets the message, “You’ve eaten enough, now stop.” As for those increased triglycerides, well… another word for triglyceride is “fat.”
In scientist-speak, “Compared with glucose, the hepatic metabolism of fructose favors lipogenesis, which may contribute to hyperlipidemia and obesity.” Translated, that says when fructose is metabolized in your liver, it is often converted to fat.
These facts about fructose are often cited in arguments against high-fructose corn syrup, but remember that sucrose, honey and even apple juice contain lots of fructose too.
One consequence of overdoing it on sweets is called “metabolic syndrome.” That’s a medical term for a number of risk factors for heart disease, diabetes and stroke: a large waistline, bad cholesterol, high blood pressure and high fasting blood sugar. In fact, fructose and sucrose are such reliable causes of metabolic syndrome that scientific papers often use the terms “fructose-induced metabolic syndrome” or “sucrose-induced metabolic syndrome.”
Some scientists add other evils to the list, including kidney disease and stroke. A 2010 study found that “Fructose feeding has now been shown to alter gene expression patterns… alter satiety factors in the brain, increase inflammation… and induce leptin resistance.”
If that sounds so bad that you decide to switch your sweetener to pure glucose (sold under the name corn syrup, and not the high-fructose variety), keep in mind that an influx of glucose into your body spikes your blood sugar, followed by a crash. This is especially true when the sugar comes in liquid form. Your body also breaks down complex carbohydrates like whole grains into glucose, but then the glucose is released more slowly into your bloodstream. In 2013, scientists found that lower blood sugar may even improve memory.
All in all, one report estimates “30%-40% of healthcare expenditures in the USA go to help address issues that are closely tied to the excess consumption of sugar.”
The sad truth is that there’s no free lunch. Even when you eat “sugar-free” cake sweetened with honey or fruit juice, it’s all sugar to your body. (However, raw unprocessed honey provides some health benefits, whereas refined sugars do not.) For an experiment, go a day with only six teaspoons of sugar (25g) if you’re a woman, or nine teaspoons (38g) if you’re a man. Don’t forget to check foods you wouldn’t expect for hidden sugars, like bread, salad dressing, pasta sauce, and ketchup. Suddenly, the amount of sugar we eat in our normal diets becomes staggering.
Longer term, if a complete sugar makeover sounds unimaginable to you, start by cutting out sugary drinks, including fruit juice. You might want to skip the diet sodas too, since research shows they can be even worse than the “real thing.”
If your heart is palpitating with dread at the very thought of giving up sugar, you’ve arrived at one of the reasons why we eat so darn much of it. Some say it’s addictive, and a 2007 study found it gives your brain a reward even greater than that of cocaine.
In his book The End of Overeating: Taking Control of the Insatiable American Appetite, former FDA commissioner David Kessler examined what drives wanting in food. “Liking is pleasure but wanting is an urge to it," he explains. “I need it, I need it to make me feel better. We looked in animals to see what was the most reinforcing. Was it the sweetness? Was it the fat? Was it the flavor? We found that sweetness drives wanting more than anything else. It drives—if you look at animals or people—how much effort they'll expend for it. How hard they will work for it.”
You’ve heard the old adage, “A moment on your lips, a lifetime on your hips.” The pleasure gained from food is so fleeting. If I eat a cookie now, I will experience a few moments of pleasure, and then no more. I can extend that pleasure briefly by eating a second cookie. And then it’s gone. To keep feeling that pleasure, I would have to keep eating cookies—at least until I feel sick from eating too many. Yet many of us are more than willing to continue jamming cookies down our throats even if we want to be healthy and we know that cookies are not health food, for the ephemeral bliss they provide.
“We know that sweetness can increase the pleasure centers of the brain, the opioid centers,” Kessler continues. “We know it can serve as a mild pain relief… I'm eating something that is sweet—it can change how I feel. So it's salient. It is powerful. It's directly hard-wired from our sensory receptors in our mouth to our brain. You don't even have to go through the bloodstream. It's a very powerful molecule because it's directly wired to our brain. And it can drive want.”
He adds that, “Sweetness isn't the only driver of wanting. Add fat to that, it becomes more powerful. Add color, add texture, add temperature, add mouthfeel. Kids’ candies are just very simple, but as you get older you want more levels of stimulation. But at the core of most foods that are hard to resist there is sweetness. Now a lot of that has to do with past learning and past memory. It's not always sweetness, depending on your past learning—but there's no doubt that sweetness is driving.”
Kessler goes into even greater detail in his book. He looks at the impact of priming, when a single taste of a food triggers what he calls “conditioned hypereating.” He points out how the food industry taunts us, “Bet you can’t eat just one.” Sadly, that is probably true. Even if you’re not particularly hungry, after a friend convinces you to have “just a taste” of ice cream, you’re more likely to order an entire cone. Why do you think Whole Foods is so generous at giving you free samples of its cakes and gelato?
Kessler, and later Michael Moss (in his book Salt Sugar Fat) examine how the food industry capitalizes on our hardwired drive for sugar (and salt and fat). Moss details food manufacturers’ efforts to improve their products nutritionally without sacrificing flavor (or sales) or increasing price. Sometimes, a healthier but higher priced substitute, like an herb, could compensate for salt, sugar and fat. More often, when the manufacturers reduce one of those three elements, they compensate by boosting one or both of the other two.
In response to her research, Nicolette Hahn Niman almost entirely gave up sugar. She limits herself to a few squares of dark chocolate each day, and she reports that she’s kicked her sugar habit, and the cravings that would make her fall back to it.
Eschewing sugar is not impossible, particularly after the initial cravings go away, but it can be difficult in our society unless you cook all of your own food. Even then, it can come off as socially gauche when you’re dining with friends or co-workers and you’re the only one who isn’t gushing over the triple chocolate mousse cake someone brought to the party.
That said, there are other flavors out there, including salty, bitter, spicy, sour and umami. Perhaps we Americans would do well to explore them.
By Liz Kimbrough
Six grassroots environmental activists will receive the prestigious Goldman Environmental Prize in a virtual ceremony this year. Dubbed the "Green Nobel Prize," this award is given annually to environmental heroes from each of the world's six inhabited continents.
Kristal Ambrose, the Bahamas<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzI3MC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1MDM5NTk5MX0.fdMrrUqf0HvWq0Uh0Ii3mXxJczHPyN1jcnSsQoXoerE/img.jpg?width=980" id="b9e66" class="rm-shortcode" data-rm-shortcode-id="b8b8777f7964bb7100672b3be0abf3fe" data-rm-shortcode-name="rebelmouse-image" />
Kristal Ambrose. Goldman Environmental Prize
Chibeze Ezekiel, Ghana<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzM2MS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1MTgzOTE3OX0.KoEZr3oMPKbeG2uT8q-ZsGPOGtIZ3l6V6NXEK5U90FU/img.jpg?width=980" id="65224" class="rm-shortcode" data-rm-shortcode-id="6ec640a8ba56a4db22b57e4f8734a7a4" data-rm-shortcode-name="rebelmouse-image" />
Chibeze Ezekiel. Goldman Environmental Prize
Nemonte Nenquimo, Ecuador<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzM2Ny9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYwNzYxODYwM30.cys5ZsFGd75UcjybADGBPFt20jrzgrsFujoj_qMTK4E/img.jpg?width=980" id="96b5a" class="rm-shortcode" data-rm-shortcode-id="0778ab7334e3297e0ead52d5fd1499e5" data-rm-shortcode-name="rebelmouse-image" />
Nemonte Nenquimo. Goldman Environmental Prize
Leydy Pech, Mexico<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzQwNy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NzkzOTYzOH0.uHlN2FQoJJ_KFJWTn4oL__lDyjA0-HDnxewBhwgQRVg/img.jpg?width=980" id="9ab07" class="rm-shortcode" data-rm-shortcode-id="ccc347126d4ce9ddbb3b9c1b4673391b" data-rm-shortcode-name="rebelmouse-image" />
Leydy Pech. Goldman Environmental Prize
Lucie Pinson, France<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzQxMS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY2NzE0NTU1NX0.OutmX3sfl4pMaoYssTQ4zk7Y14_hans7-Z-0B0xsjfM/img.jpg?width=980" id="4bcd7" class="rm-shortcode" data-rm-shortcode-id="4bff14750dc0a70fc79e9484ea2bdbd4" data-rm-shortcode-name="rebelmouse-image" />
Lucie Pinson. Goldman Environmental Prize
Paul Sein Twa, Myanmar<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0NzQxNS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1NDAyNjU0MH0.DHrKykngmcJyJ5rn4r91ANH7FmQ7Us6ZMEOis8yAzGY/img.jpg?width=980" id="8fa36" class="rm-shortcode" data-rm-shortcode-id="0e703d62288df00931cd678c861c6e0b" data-rm-shortcode-name="rebelmouse-image" />
Paul Sein Twa. Goldman Environmental Prize
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By Philip James
As the days shorten and temperatures drop in the northern hemisphere, leaves begin to turn. We can enjoy glorious autumnal colors while the leaves are still on the trees and, later, kicking through a red, brown and gold carpet when out walking.
Reaching the Limit<p>The researchers, led by Deborah Zani at the Swiss Federal Institute of Technology, studied the degree to which the timing of color changes in autumn tree leaves was determined by the growth of the plant in the preceding spring and summer.</p><p>Temperature and day length were traditionally accepted as the main determinants of when leaves changed color and fell, leading <a href="http://max2.ese.u-psud.fr/publications/Delpierre_2009_AFM.pdf" target="_blank" rel="noopener noreferrer">some scientists</a> to assume that warming temperatures would delay this process until later in the season. Studying deciduous European tree species, including horse chestnut, silver birch and English oak, the authors of the new study recorded how much carbon each tree absorbed per season and how that ultimately affected when the leaves fell.</p><p>Using data from the <a href="https://www.researchgate.net/profile/Barbara_Templ/publication/323254030_Pan_European_Phenological_database_PEP725_a_single_point_of_access_for_European_data/links/5a8bf0dba6fdcc6b1a442ef2/Pan-European-Phenological-database-PEP725-a-single-point-of-access-for-European-data.pdf" target="_blank" rel="noopener noreferrer">Pan European Phenology Project</a>, which has tracked some trees for as long as 65 years, the researchers found in their long-term observational study that as the rate of photosynthesis increased, leaves changed color and fell earlier in the year. For every 10% increase in photosynthetic activity over the spring and summer growing season, trees shed their leaves, on average, eight days earlier.</p><p>Climate-controlled experiments on five-year-old European beech and Japanese meadowsweet trees suggest what could be behind this unexpected result. In these trials, the trees were exposed to full sun, half shade or full shade. The results show that there is a limit to the amount of photosynthesis that a tree can carry out over a growing season. Think of it like filling a bucket with water. It can be done slowly or quickly, but once the bucket is full, there is nowhere for any more water to go.</p>
Earlier Autumn Colors<p>In a world with increasing levels of <a href="https://public.wmo.int/en/media/press-release/carbon-dioxide-levels-continue-record-levels-despite-covid-19-lockdown#:%7E:text=The%20annual%20globally%20averaged%20level,per%20million%20benchmark%20in%202015." target="_blank" rel="noopener noreferrer">carbon in the atmosphere</a>, these new findings imply that warmer weather and longer growing seasons will not allow temperate deciduous trees to take up more carbon dioxide. The study's predictive model suggests that by 2100, when tree growing seasons are expected to be between 22 and 34 days longer, leaves will fall from trees between three and six days earlier than they do now.</p><p>This has significant implications for climate change modeling. If we accept that the amount of carbon taken up by deciduous trees in temperature countries like the UK will remain the same each year regardless of the growing season, carbon dioxide levels will rise more quickly than was previously expected. The only way to change this will be to increase the capacity of trees to absorb carbon.</p><p>Plants that aren't limited by the amount of nitrogen available may be able to grow for longer in the warming climate. These are the trees which can take nitrogen from the air, such as <a href="https://www.woodlandtrust.org.uk/trees-woods-and-wildlife/british-trees/a-z-of-british-trees/alder/" target="_blank">alder</a>. But these species will still lose their leaves at roughly the same time as always, thanks to less daylight and colder temperatures.</p><p>But on the upside, with the prospect of some trees losing their leaves earlier and others losing them at the time they do now, there might be the prospect of prolonged autumnal colors – and more time for us to kick through the leaves.</p>
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By Kang-Chun Cheng
Modoc County lies in the far northeast corner of California, and most of its 10,000 residents rely on cattle herding, logging, or government jobs for employment. Rodeos and 4-H programs fill most families' calendars; massive belt buckles, blue jeans, and cowboy hats are common attire. Modoc's niche brand of American individualism stems from a free-spirited cowboy culture that imbues the local ranching conflict with wild horses.
The History of Horse Management<p>Before the 1950s, feral horses were largely unregulated in the U.S. They were released, grazed, captured, killed, sold, and otherwise <a href="http://www.blm.gov/sites/blm.gov/files/WHB-Report-2020-NewCover-051920-508.pdf" target="_blank" rel="noopener noreferrer">managed by local inhabitants</a> as they saw fit. Around that time, Velma Bronn Johnston, aka "Wild Horse Annie," started raising public awareness of the "perceived inhumane capture and treatment of free-ranging herds."</p><p>Thanks in part to Johnston's efforts, the Wild Free-Roaming Horses and Burros Act was signed into law by President Nixon in 1971. It declared that the animals "shall be protected from capture, branding, harassment, or death; and to accomplish this, they are to be considered in the area where presently found, as an integral part of the natural system of the public lands."</p><p><a href="http://science.sciencemag.org/content/341/6148/847.full" target="_blank" rel="noopener noreferrer">This act</a> has been amended four times since its conception to accommodate the fluctuating opinions and conditions around maintaining a "thriving natural ecological balance on the public lands"—an admirable although highly subjective goal. Achieving it involves juggling competing interests: those of local residents, permanent grazers, hunters and fishers, advocacy groups, conservationists, and Indigenous tribes.</p><p>The Bureau of Land Management must manage these many conflicting interests. Modoc County's <a href="https://www.fs.fed.us/wild-horse-burro/territories/DevilsGardenPlateau.shtml" target="_blank">Devil's Garden Plateau Wild Horse Territory</a> epitomizes the challenges of this task. Officially deemed wild horse territory, the garden consists of 258,000 acres and is wholly within permitted livestock allotments. It is also home to wildlife such as cougar, antelope, migratory birds, and aquatic species dependent on delicate high-desert riparian areas.</p><p>The presence of wild horses has been shown to <a href="https://www.sciencedirect.com/science/article/pii/S014019631530094X" target="_blank">decrease native wildlife species diversity</a> for both birds and mammals. Pronghorn antelope are an icon in Western grasslands, known for their annual 350-mile migration along historic routes estimated to be 5,800 years old. This awe-inspiring trek is one of the longest large-mammal migration corridors remaining in North America, but 75% of <a href="http://conbio.onlinelibrary.wiley.com/doi/abs/10.1111/j.1523-1739.2004.00548.x" target="_blank" rel="noopener noreferrer">pronghorn migration routes</a> have already been lost because of disturbances from the accelerated leasing of public lands and energy development. Horses also affect the pronghorn's yearly migrations by <a href="http://www.sciencedirect.com/science/article/pii/S014019631630218X" target="_blank" rel="noopener noreferrer">monopolizing watering holes</a>, thus preventing native species from drinking.</p>
Indigenous Support for Ecological Balance<p>Ken Sandusky, a public information officer who has worked for the Forest Service in Modoc County for 13 years, lives by his station's mission statement: "Caring for the Land and Serving People." In his work, Sandusky aims to include the broad range of stakeholders and often acts as a tribal liaison. Sandusky himself is a member of the Choctaw tribe of Oklahoma, but as a Modoc native, is more culturally in touch with the local Klamath tribe.</p><p>When it comes to rangeland health, he says, there's a tangible split in what that actually means. "It depends on what you are measuring the outcome against," Sandusky explains. Range managers may perceive progress from a year-to-year basis, but to many Indigenous tribes, the baseline for "progress" goes back generations, to pre-contact times. "They have long memories," he says. "Tribes see damage that is a hundred-plus years in the making."</p>
A Willingness to Try New Things<p>"Americans don't know what's happening on these lands," says Suzanne Roy, the executive director of the American Wild Horse Campaign, an advocacy organization. The Bureau of Land Management, she says, "is run by and for the livestock industry. They come from a ranching background. The term 'rangeland' management itself illustrates how livestock management is the dominant perspective."</p><p>Roy is particularly concerned about how resources are being allocated: "Policies of land management agencies don't reflect the desires and interests of the public." To illustrate, most Americans associate public lands with national parks and environmental conservation; only 29% of respondents to a recent poll considered livestock grazing an acceptable use of those lands.</p><p>Grazing on public lands certainly aligns with the financial interests of cattle ranchers and helps explain why they insist on increased wild horse management. Cattle can <a href="http://fas.org/sgp/crs/misc/RS21232.pdf" target="_blank">graze on public lands</a> for $1.35 per animal per month, while grazing on comparable private land costs ranchers $23 per animal per month (American taxpayer dollars make up the difference). To be fair, though, small-scale ranching would not be viable without public lands.</p><p>The campaign hopes to work toward more equitable resource allocation and improvements to overall habitats for horses and wildlife generally. "There are workable solutions to this issue," Roy says. "Common pushback from rangers is that new conservation strategies will 'destroy our way of life,' but change doesn't have to be bad."</p><p>The <a href="https://www.sciencedirect.com/science/article/abs/pii/0362331994900264" target="_blank">social conservatism</a> intrinsic to human cultures makes change seem daunting and people reluctant to try new tactics even in the face of suboptimal systems. Roy uses a case in adjacent Marin County to illustrate: Until 2001, the county ran a USDA program focused on killing apex predators (e.g. coyotes, mountain lions, and cougars) in defense of livestock. Unfortunately, this strategy fails to take into account the science of predators. Killing one mountain lion, for example, creates a vacuum and will eventually lead to increased competition for this newly available territory. In 2001, Marin introduced a country-run program that promoted nonlethal methods such as fox lights, guard dogs, and fladry to deal with predator incidents while compensating ranchers for sheep and lambs lost to predation.</p><p>Ranchers were initially livid, concerned that bans on shooting and trapping hindered their rights, making them defenseless against livestock predation. But 15 years later, a majority agreed that this form of humane <a href="http://www.projectcoyote.org/wp-content/uploads/2016/10/Camilla-Fox-Thesis-FINAL-January-2008.pdf" target="_blank" rel="noopener noreferrer">adaptive management </a>has successfully reduced both livestock losses and the total number of predators. Ensuring its continued success, the program requires active participation on behalf of all stakeholders and long-term commitment from the local government for support.</p><p>As one fifth-generation sheepherder, Gowan Batiste, explained in an interview to the <a href="https://www.msn.com/en-us/news/us/mendocino-county-rancher-and-others-calling-for-non-lethal-wildlife-management/ar-BB16CJ8g" target="_blank" rel="noopener noreferrer">Ukiah Daily Journal,</a> "Livestock is a food of desperation for predators; the more you harass them and make life difficult for them, the more likely they are going to come into conflict with humans."</p>
Keeping Wild Horses in Check<p>When it comes to wild horses, many solutions are already in the works. Through annual autumn wild horse roundups, known as gathers, the Double Devil Wild Horse Corrals has become one of the U.S.'s most successful adoption sites. The California Cattlemen's Association, a nonprofit trade association and organization popular among ranchers in Modoc, urges its members to support the wild horse gathers in Devils Garden, saying they are humane, good for the horses themselves (since competition for scarce water and forage resources may instigate aggression and <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/j.1439-0310.1981.tb01930.x" target="_blank" rel="noopener noreferrer">herd violence</a>), and necessary to support local ranchers and Modoc's agriculture-reliant economy.</p><p>Another popular solution for controlling wild horse populations is a fertility-control vaccine called PZP, given to female horses on the range <a href="https://www.youtube.com/watch?v=Ur7w3UPTCsk" target="_blank" rel="noopener noreferrer">using dart guns</a>. Mares are tracked on foot or with game cameras while drones are used to locate more elusive herds. The PZP vaccine has been endorsed by the American Wild Horse Campaign as the "<a href="https://americanwildhorsecampaign.org/fertility-control" target="_blank" rel="noopener noreferrer">most promising strategy</a>" for managing wild horses in their habitats and is also recommended by the National Academy of Sciences. Importantly, a dose of the vaccine only costs $30.</p><p>Lastly, land acquisition and <a href="https://americanwildhorsecampaign.org/equitable-share-resources" target="_blank">grazing lease buyouts</a> can promote equitable sharing of public lands and available forage. Acquiring key pieces of land adjacent to or within federally designated wild horse habitat areas can reduce conflicts over resource allocation.</p>
A Global Search for Solutions<p>Pastoralists all over the world face similar land-use conflicts, despite huge variations in climate and culture. The ongoing situation across rural California resonates with that of Fulani cattle herders in Niger and Sami reindeer herders in the Arctic.</p><p>Herders everywhere are accused of having too many animals or are perceived as selfish and irresponsible by their own communities. Overgrazing is certainly an issue, but it's not simply the number of animals that matters: The <a href="https://savory.global/holistic-management/" target="_blank">amount of time</a> animals spend in a certain area is critical to rangeland health. And in the context of such allegations, the ecological value of grazing is frequently omitted. Grazers, both wild and domestic, <a href="https://www.yesmagazine.org/issue/food-everyone/2019/02/04/restoring-the-range-can-beef-be-earth-friendly/" target="_blank" rel="noopener noreferrer">are key to regulating soil health and allowing for species diversity and coverage, </a>as well as efficient carbon sequestration.</p><p>Part of the problem in these heated grazing debates is that moderate viewpoints are drowned out by extremist agendas—those who prioritize wild horse populations at all costs and those who want all of the horses gone, period. "The majority of people don't really have strong views about the horses," Sandusky says. "But the ones who do can get really into it." These unwavering views make it difficult to find compromises that account for all stakeholders.</p><p>"There is no biological problem, merely a social one," says professor Nicholas Tyler, a pastoralism expert at the University of Tromsø in northern Norway. Tyler maintains that in the case of horses and cattle in the West, as with so many others, the so-called equilibria argument is specious and quasi-biological. "Certainly a lot of horses will influence the species composition," he says. "Remove the horses, things change. Add horses, things change again. There is nothing magical about that."</p><p>But Tyler takes it one step further: "There never was, is, or will be a balance. There are shifting equilibria, which is something quite different," he says. "It is up to the community to decide which state of that equilibrium it prefers."</p>
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