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Guilt-Tripping for the Public Good Often Achieves Its Intended Result

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Tuesday, April 16, 2024

In 2016 Merck launched an advertising campaign for its HPV vaccine that aroused a storm of protest and headlines. The Washington Post published an article entitled “Do the new Merck HPV ads guilt-trip parents or tell hard truths? Both.” One of Merck’s TV ads showed an adult woman diagnosed with cervical cancer and flashed back to her as a child, asking, “Did you know [there was a vaccine for HPV]—Mom, Dad?”“I thought, ‘This is the thing that's going to make parents say I would feel horrible if my kid got cervical cancer later, and I could have vaccinated them,’” says Monique Turner, a communication scientist at Michigan State University (MSU). ”So, from a research perspective, I was like, ‘Thumbs-up, Merck.’ But they took a lot of heat for it.”Guilt is a powerful tool. Research has shown that, wielded effectively, it can persuade people to do the right thing. In a recent analysis of 26 studies of guilt appeals, Washington State University communication scientist Wei Peng found that guilt works—if people hearing the pitch are not made to feel responsible for a bad situation. Picture asking them to help with an environmental catastrophe.On supporting science journalismIf you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.The most straightforward pitches involve what researchers call “existential guilt,” Peng says. They rely on our internal moral code that, as a human being, we have an obligation to relieve the suffering of others if we can. “What I found is that people feel guilty about people’s suffering even if they don’t have a direct personal relationship,” Peng says, “even if they are on the other side of the world.”It’s hard for most people to see photographs of starving children. Doing so hurts. Taking action to help them offers some relief. That’s what advocates are counting on when they ask you for donations to feed orphans or build shelters for earthquake survivors. Knowing guilt’s potential for good, social scientists are seeking the optimal formula to craft pitches for everything from promoting health behaviors and road safety to safeguarding the planet.But getting the formula right is tricky. “We have a hardwired negativity bias to instantly pay attention to anything that arouses a negative emotion,” says Pennsylvania State University media psychologist Jessica Myrick. That’s why inflicting guilt often works. But the downside of arousing this intensely uncomfortable feeling is that people can employ a battery of defenses against it: getting angry, rationalizing or distancing from the issue.That is the important takeaway from Peng’s research: guilt works when it doesn’t trigger resistance. In other words, don’t make listeners feel they’ve done something bad. “If you say we need to do something different versus you,” says persuasion scholar Robin Nabi of the University of California, Santa Barbara, “now you’re not the bad guy. We all have responsibility.”There are many ways to get this wrong. For example, if messengers arouse shame rather than guilt, MSU’s Turner found, people resist more. In her research, participants were asked to read an ad urging testing for sexually transmitted diseases (STDs) that evoked either guilt or shame and then to give their reactions. A headline in the guilt and shame appeals respectively asked what or who would give one’s partner an STD,” followed by multiple-choice answers. In both, the correct answer—“all of the above”—was circled at the bottom. The second-to-last option seen by both groups was objective: it referred to a person who hadn’t been tested for an STD The other multiple-choice answers were designed to evoke either guilt or shame. Those in the guilt appeal group were presented with choices such as, “someone with uninformed behavior”and “someone with forgetful behavior.” The group reading the shame appeal saw choices such as, “a selfish person” and “an irresponsible person.” Subjects in the latter group were likelier to feel angry and manipulated.As Turner explains, pointing out problematic behavior induces guilt, but focusing on someone’s inherent character traits—selfishness, for example—can induce shame. In most contexts, making people feel ashamed is not a good persuader.The key to making a guilt pitch succeed is to offer people relief from the guilt they’re feeling. In humanitarian appeals, people are usually offered easy-to-accomplish solutions: save the puppies from being euthanized by donating or volunteering, for instance. For health or safety messages, taking action may be harder, making messaging more challenging.If you’re asking parents to shield their kids from asthma risk from secondhand smoke, for example, saying, “Just quit” may be too hard for them. It is more effective, Nabi says, if you give people options: “Just smoke outside or not around your kids” or “Cut down how much you smoke.” “The idea is that when you evoke this emotion and then you give people a sense of efficacy,” she says, “it’s actually hope evoking.”That’s what scientists are finding in the lab. Adding a feel-good emotion to a guilt appeal—hope or pride, for example—works better. For one thing, it reduces people’s defensiveness, and that’s the first step: make sure they don’t shut you out. One recent study tested the effect of building hope into guilt appeals in a campaign to reduce texting while driving, which is an urgent safety issue because laws and enforcement have done little to reduce crashes tied to texting.In the online experiment, about 400 people were randomly placed in four groups. The first two groups viewed identical posters except that one added a hopeful message. The headline in both read, “You are never alone on the road.”The posters acknowledged how tempting it was to answer a text but noted that texting while driving was a factor in 20 percent of crashes. The “hope” message added recommendations to “turn on drive mode or silence your phone” and noted that doing so “can save lives.” In two other groups, people read what were essentially the same guilt-invoking or hopeful messages except that the language was more intense. The top headline, for example, read, “What you don’t see is a long and lovely life.” Adding the hopeful message reduced targets’ defensive responses in both language intensity groups. It also increased their stated intentions to avoid texting while driving.One new preprint study on guilt messaging tested the effect of inducing empathy alongside guilt in a hypothetical public-service campaign to reduce plastic bag pollution in oceans. In this online experiment, 257 college students were randomly assigned to read one of four messages from a fictional Facebook page, “Save the Marine Animals Foundation,” asking them to reduce their plastic bag use. In half the groups the undergraduates were asked to take the perspective of an animal suffering from ingesting a plastic bag. Researchers found that adopting the animals’ viewpoint created empathy. More empathy was associated with more guilt, which was, in turn, correlated with an increase in participants’ intentions to cut down on plastic bag use.In some appeals to protect the environment, inducing pride along with guilt proves to be the winning recipe for persuading people to change their behavior. In a meta-analysis of 30 years of research, data scientist Nathan Shipley, then at the University of Illinois at Urbana-Champaign, zeroed in on campaigns that induce people to imagine they’ll feel guilty or proud of themselves depending on their future behavior. He found that both emotions correlated with subjects’ intended and reported pro-environmental behavior, but the pride relationship was stronger.The success of these efforts depends at least partly on how well a message is tailored to a specific audience. Undergraduates in these studies, for example, are typically more environmentally conscious than their parents. The results in a new study showed that for Generation Z restaurant diners, both anticipated guilt for eating less environmentally sustainable food and an anticipated pride for eating more environmentally friendly, plant-based foods influenced their intentions to eat at chain restaurants that offered nonmeat options.Another study tested whether mothers of young children were more susceptible than others to guilt appeals to switch to buying organic food. The researchers found that they were. That’s not surprising, says Myrick, who is a mother of three kids under the age of five. Myrick is bombarded with guilt appeals. She’s had to triage the things she feels guilty about, such as using disposable diapers and paper plates, because, she says, “I’d feel even more guilty if I didn’t feed my kids something even when I don’t have time to prepare food.”Another study measured neither pride nor guilt, but both may have been implicitly invoked, says Elizabeth Hewitt, a social scientist at Stony Brook University and lead author of the paper. Over 12 weeks in two next-door apartment buildings in New York City, experimenters posted signs in the trash rooms every week announcing how well each building had done in recycling efforts. The sign in one building compared the amount of much of plastic, metal and glass its residents had recycled during the previous week with how much they had recycled the week before. The sign in the other building compared the amount its residents recycled in the previous week with how much their neighbors recycled during the same period. Both buildings increased their recycling by bag weight, but the feedback that compared residents with their neighbors resulted in more recycled material. Although the mechanism operated through peer pressure, guilt can play a role if a person feels they are not doing as much as they should, Hewitt says. Surpassing your neighbors can trigger pride.This swell of research is both timely and necessary, scientists say. Left to our own devices, we are not always our best selves—or our own best friends. Persuasive public service messaging will need to be crafted for new generations. Take the campaigns for the HPV vaccine. Over 20 years, they were a factor in reducing HPV infections in teenage girls by 88 percent and in young adult women by 81 percent. Yet vaccination rates in the U.S. remain lower than in other countries, and rates are uneven across the U.S., leaving many vulnerable to preventable cancers. To address such problems, it remains urgent to find effective tools of persuasion. Guilt, massaged in the right ways, can be a powerful tool.

The emerging science of laying guilt through public messaging can help safeguard the planet and improve health behaviors

In 2016 Merck launched an advertising campaign for its HPV vaccine that aroused a storm of protest and headlines. The Washington Post published an article entitled “Do the new Merck HPV ads guilt-trip parents or tell hard truths? Both.” One of Merck’s TV ads showed an adult woman diagnosed with cervical cancer and flashed back to her as a child, asking, “Did you know [there was a vaccine for HPV]—Mom, Dad?”

“I thought, ‘This is the thing that's going to make parents say I would feel horrible if my kid got cervical cancer later, and I could have vaccinated them,’” says Monique Turner, a communication scientist at Michigan State University (MSU). ”So, from a research perspective, I was like, ‘Thumbs-up, Merck.’ But they took a lot of heat for it.”

Guilt is a powerful tool. Research has shown that, wielded effectively, it can persuade people to do the right thing. In a recent analysis of 26 studies of guilt appeals, Washington State University communication scientist Wei Peng found that guilt works—if people hearing the pitch are not made to feel responsible for a bad situation. Picture asking them to help with an environmental catastrophe.


On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


The most straightforward pitches involve what researchers call “existential guilt,” Peng says. They rely on our internal moral code that, as a human being, we have an obligation to relieve the suffering of others if we can. “What I found is that people feel guilty about people’s suffering even if they don’t have a direct personal relationship,” Peng says, “even if they are on the other side of the world.”

It’s hard for most people to see photographs of starving children. Doing so hurts. Taking action to help them offers some relief. That’s what advocates are counting on when they ask you for donations to feed orphans or build shelters for earthquake survivors. Knowing guilt’s potential for good, social scientists are seeking the optimal formula to craft pitches for everything from promoting health behaviors and road safety to safeguarding the planet.

But getting the formula right is tricky. “We have a hardwired negativity bias to instantly pay attention to anything that arouses a negative emotion,” says Pennsylvania State University media psychologist Jessica Myrick. That’s why inflicting guilt often works. But the downside of arousing this intensely uncomfortable feeling is that people can employ a battery of defenses against it: getting angry, rationalizing or distancing from the issue.

That is the important takeaway from Peng’s research: guilt works when it doesn’t trigger resistance. In other words, don’t make listeners feel they’ve done something bad. “If you say we need to do something different versus you,” says persuasion scholar Robin Nabi of the University of California, Santa Barbara, “now you’re not the bad guy. We all have responsibility.”

There are many ways to get this wrong. For example, if messengers arouse shame rather than guilt, MSU’s Turner found, people resist more. In her research, participants were asked to read an ad urging testing for sexually transmitted diseases (STDs) that evoked either guilt or shame and then to give their reactions. A headline in the guilt and shame appeals respectively asked what or who would give one’s partner an STD,” followed by multiple-choice answers. In both, the correct answer—“all of the above”—was circled at the bottom. The second-to-last option seen by both groups was objective: it referred to a person who hadn’t been tested for an STD The other multiple-choice answers were designed to evoke either guilt or shame. Those in the guilt appeal group were presented with choices such as, “someone with uninformed behavior”and “someone with forgetful behavior.” The group reading the shame appeal saw choices such as, “a selfish person” and “an irresponsible person.” Subjects in the latter group were likelier to feel angry and manipulated.

As Turner explains, pointing out problematic behavior induces guilt, but focusing on someone’s inherent character traits—selfishness, for example—can induce shame. In most contexts, making people feel ashamed is not a good persuader.

The key to making a guilt pitch succeed is to offer people relief from the guilt they’re feeling. In humanitarian appeals, people are usually offered easy-to-accomplish solutions: save the puppies from being euthanized by donating or volunteering, for instance. For health or safety messages, taking action may be harder, making messaging more challenging.

If you’re asking parents to shield their kids from asthma risk from secondhand smoke, for example, saying, “Just quit” may be too hard for them. It is more effective, Nabi says, if you give people options: “Just smoke outside or not around your kids” or “Cut down how much you smoke.” “The idea is that when you evoke this emotion and then you give people a sense of efficacy,” she says, “it’s actually hope evoking.”

That’s what scientists are finding in the lab. Adding a feel-good emotion to a guilt appeal—hope or pride, for example—works better. For one thing, it reduces people’s defensiveness, and that’s the first step: make sure they don’t shut you out. One recent study tested the effect of building hope into guilt appeals in a campaign to reduce texting while driving, which is an urgent safety issue because laws and enforcement have done little to reduce crashes tied to texting.

In the online experiment, about 400 people were randomly placed in four groups. The first two groups viewed identical posters except that one added a hopeful message. The headline in both read, “You are never alone on the road.”The posters acknowledged how tempting it was to answer a text but noted that texting while driving was a factor in 20 percent of crashes. The “hope” message added recommendations to “turn on drive mode or silence your phone” and noted that doing so “can save lives.” In two other groups, people read what were essentially the same guilt-invoking or hopeful messages except that the language was more intense. The top headline, for example, read, “What you don’t see is a long and lovely life.” Adding the hopeful message reduced targets’ defensive responses in both language intensity groups. It also increased their stated intentions to avoid texting while driving.

One new preprint study on guilt messaging tested the effect of inducing empathy alongside guilt in a hypothetical public-service campaign to reduce plastic bag pollution in oceans. In this online experiment, 257 college students were randomly assigned to read one of four messages from a fictional Facebook page, “Save the Marine Animals Foundation,” asking them to reduce their plastic bag use. In half the groups the undergraduates were asked to take the perspective of an animal suffering from ingesting a plastic bag. Researchers found that adopting the animals’ viewpoint created empathy. More empathy was associated with more guilt, which was, in turn, correlated with an increase in participants’ intentions to cut down on plastic bag use.

In some appeals to protect the environment, inducing pride along with guilt proves to be the winning recipe for persuading people to change their behavior. In a meta-analysis of 30 years of research, data scientist Nathan Shipley, then at the University of Illinois at Urbana-Champaign, zeroed in on campaigns that induce people to imagine they’ll feel guilty or proud of themselves depending on their future behavior. He found that both emotions correlated with subjects’ intended and reported pro-environmental behavior, but the pride relationship was stronger.

The success of these efforts depends at least partly on how well a message is tailored to a specific audience. Undergraduates in these studies, for example, are typically more environmentally conscious than their parents. The results in a new study showed that for Generation Z restaurant diners, both anticipated guilt for eating less environmentally sustainable food and an anticipated pride for eating more environmentally friendly, plant-based foods influenced their intentions to eat at chain restaurants that offered nonmeat options.

Another study tested whether mothers of young children were more susceptible than others to guilt appeals to switch to buying organic food. The researchers found that they were. That’s not surprising, says Myrick, who is a mother of three kids under the age of five. Myrick is bombarded with guilt appeals. She’s had to triage the things she feels guilty about, such as using disposable diapers and paper plates, because, she says, “I’d feel even more guilty if I didn’t feed my kids something even when I don’t have time to prepare food.”

Another study measured neither pride nor guilt, but both may have been implicitly invoked, says Elizabeth Hewitt, a social scientist at Stony Brook University and lead author of the paper. Over 12 weeks in two next-door apartment buildings in New York City, experimenters posted signs in the trash rooms every week announcing how well each building had done in recycling efforts. The sign in one building compared the amount of much of plastic, metal and glass its residents had recycled during the previous week with how much they had recycled the week before. The sign in the other building compared the amount its residents recycled in the previous week with how much their neighbors recycled during the same period. Both buildings increased their recycling by bag weight, but the feedback that compared residents with their neighbors resulted in more recycled material. Although the mechanism operated through peer pressure, guilt can play a role if a person feels they are not doing as much as they should, Hewitt says. Surpassing your neighbors can trigger pride.

This swell of research is both timely and necessary, scientists say. Left to our own devices, we are not always our best selves—or our own best friends. Persuasive public service messaging will need to be crafted for new generations. Take the campaigns for the HPV vaccine. Over 20 years, they were a factor in reducing HPV infections in teenage girls by 88 percent and in young adult women by 81 percent. Yet vaccination rates in the U.S. remain lower than in other countries, and rates are uneven across the U.S., leaving many vulnerable to preventable cancers. To address such problems, it remains urgent to find effective tools of persuasion. Guilt, massaged in the right ways, can be a powerful tool.

Read the full story here.
Photos courtesy of

Why the health risks from air pollution could be worse than we thought

A new study found elevated and previously overlooked health risks for communities living near industrial polluters.

Many people who live near heavy industry are routinely exposed to dozens of different pollutants, which can result in a multitude of health problems.Traditionally, environmental regulators have assessed the risks of chemical exposure on an individual basis. But that approach has led to underestimates of the total health risks faced by vulnerable populations, according to a new study.Now researchers at Johns Hopkins University have developed a new method for measuring the cumulative effects on human health of multiple toxic air pollutants. Their findings were published last week in Environmental Health Perspectives.Regulators typically measure community risk by looking at the primary health effects of individual chemicals, an approach that often fails to address their combined risks, said Keeve Nachman, the study’s senior author.Residents in disadvantaged communities are exposed to a toxic stew of chemicals daily, and they “don’t just breathe one at a time, [they] breathe all the chemicals in the air at once,” said Peter DeCarlo, another of the study’s authors.Follow Climate & environment“Very little has happened to protect these people. And one of the major reasons for that is that current approaches have not done a good job showing they’re in harm’s way,” Nachman said.“When we regulate chemicals, we pretend that we’re only exposed to one chemical at a time,” Nachman continued. “If we have each chemical and we only think about the most sensitive effect, but we ignore the fact that it could potentially cause all these other effects to different parts of the body, we are missing protecting people from the collective mixture of chemicals that act together.”Nachman, DeCarlo and their colleagues set out to more accurately account for the total burden of breathing multiple toxic air pollutants.The study assessed the risks faced by communities in southeastern Pennsylvania living near petrochemical facilities using a mobile laboratory to measure 32 hazardous air pollutants, including vinyl chloride, formaldehyde and benzene. The researchers developed real-time profiles of the pollution concentrations in the air and translated them into estimates of what people are actually breathing.Using these estimates and a database of the chemicals’ toxic effects on various organs, the researchers created projections of the long-term cumulative health impacts of the pollution.By looking past the immediate health effects of chemicals and measuring what happens as concentrations increase, negative health outcomes can be detected in other parts of the body, Nachman said.For example, while EPA risk assessments consider only the respiratory effects of formaldehyde, the study found potential health impacts in 10 other organ systems, including neurological, developmental and reproductive harms.The cumulative risk study appears at a fraught moment for environmental regulation. Although the Biden administration in November released a draft framework for monitoring the cumulative impact of chemical exposure, the Trump administration has announced plans to roll back dozens of Biden administration environmental rules and is considering shutting down the EPA’s Office of Research and Development.A spokesperson for the American Chemistry Council, an industry trade group, said in an email that the Johns Hopkins research “may provide some useful information” but that “further assessment, replication and validation will be needed” of the methods and substances assessed in the study.“ACC continues to support the development of scientifically robust data, methods and approaches to underpin cumulative risk assessments,” the spokesperson added.The EPA did not provide an immediate comment while it reviewed the study.Jen Duggan, the executive director of the Environmental Integrity Project, said communities often face higher health impacts than the EPA estimates due to their exposure to dangerous chemicals from multiple sources.“The authors of this paper powerfully demonstrate how EPA has repeatedly underestimated the true health risks for people living in the shadow of industrial polluters,” Duggan said.

Utah Bans Fluoride In Public Drinking Water

Republican Gov. Spencer Cox signed the legislation despite widespread opposition from dentists and national health organizations.

SALT LAKE CITY (AP) — Utah has become the first state to ban fluoride in public drinking water, despite widespread opposition from dentists and national health organizations.Republican Gov. Spencer Cox signed legislation late Thursday that bars cities and communities from deciding whether to add the mineral to their water systems.Fluoride strengthens teeth and reduces cavities by replacing minerals lost during normal wear and tear, according to the U.S. Centers for Disease Control and Prevention.Utah lawmakers who pushed for a ban said putting fluoride in water was too expensive. Cox, who grew up and raised his own children in a community without fluoridated water, compared it recently to being “medicated” by the government.The ban comes weeks after U.S. Health Secretary Robert F. Kennedy Jr., who has expressed skepticism about water fluoridation, was sworn into office.More than 200 million people in the U.S., or almost two-thirds of the population, receive fluoridated water through community water. The addition of low levels of fluoride to drinking water has long been considered one of the greatest public health achievements of the last century.But some cities across the country have gotten rid of fluoride from their water, and other municipalities are considering doing the same. A few months ago, a federal judge ordered the U.S. Environmental Protection Agency to regulate fluoride in drinking water because high levels could pose a risk to the intellectual development of children.We Don't Work For Billionaires. We Work For You.Big money interests are running the government — and influencing the news you read. While other outlets are retreating behind paywalls and bending the knee to political pressure, HuffPost is proud to be unbought and unfiltered. Will you help us keep it that way? You can even access our stories ad-free.You've supported HuffPost before, and we'll be honest — we could use your help again. We won't back down from our mission of providing free, fair news during this critical moment. But we can't do it without you.For the first time, we're offering an ad-free experience to qualifying contributors who support our fearless journalism. We hope you'll join us.You've supported HuffPost before, and we'll be honest — we could use your help again. We won't back down from our mission of providing free, fair news during this critical moment. But we can't do it without you.For the first time, we're offering an ad-free experience to qualifying contributors who support our fearless journalism. We hope you'll join us.Support HuffPostAlready contributed? Log in to hide these messages.The president of the American Dental Association, Brett Kessler, has said the amounts of fluoride added to drinking water are below levels considered problematic.Opponents warn the ban will disproportionately affect low-income residents who may rely on public drinking water having fluoride as their only source of preventative dental care. Low-income families may not be able to afford regular dentist visits or the fluoride tablets some people buy as a supplement in cities without fluoridation.The sponsor of the Utah legislation, Republican Rep. Stephanie Gricius, acknowledged fluoride has benefits, but said it was an issue of “individual choice” to not have it in the water.

Dozens of House Democrats push back on planned EPA research and development cuts

Dozens of House Democrats pushed back on planned Environmental Protection Agency (EPA) cuts in a Thursday letter to the agency. “We are particularly concerned by the proposal to eliminate up to 75 percent of employees within EPA’s Office of Research and Development (ORD),” the letter, from Rep. Greg Landsman (D-Ohio) and addressed to EPA Administrator...

Dozens of House Democrats pushed back on planned Environmental Protection Agency (EPA) cuts in a Thursday letter to the agency. “We are particularly concerned by the proposal to eliminate up to 75 percent of employees within EPA’s Office of Research and Development (ORD),” the letter, from Rep. Greg Landsman (D-Ohio) and addressed to EPA Administrator Lee Zeldin, reads. “Firing nearly 1,200 dedicated ORD public servants across the country would decimate the scientific backbone of EPA which provides independent, objective, and unparallelled research that informs Agency assessments and decision-making,” they added. The letter featured the signatures of over 60 House Democrats including Reps. Nikema Williams (Ga.), Ro Khanna (Calif.), Summer Lee (Pa.), Don Beyer (Va.), Joe Neguse (Colo.), Jamie Raskin (Md.), Pramila Jayapal (Wash.) and Rashida Tlaib (Mich.). The Hill reported last week that the EPA was considering the cutting of its science arm and dropping most of the employees of the branch, per documents reviewed by Democratic staff for the House Science, Space and Technology Committee. The termination of the Office of Research and Development as an EPA National Program Office is called for in a plan reviewed by committee staffers. Fifty percent to 70 percent of the 1,540 staffers in the office would be cut under the plan. “While no decisions have been made yet, we are actively listening to employees at all levels to gather ideas on how to better fulfill agency statutory obligations, increase efficiency, and ensure the EPA is as up-to-date and effective as ever,” EPA spokesperson Molly Vaseliou said in a previous statement. In his letter, Landsman said dropping “the majority of ORD employees would be particularly harmful to EPA’s work to address industrial pollution, contaminated air and drinking water, environmental health, and worsening natural disasters.” The Ohio Democrat also questioned the EPA about the reasoning behind the staff cuts in the plan and the way the agency is prepping “to mitigate the loss of scientific expertise, institutional knowledge, and subject matter capacity resulting from this proposed action.” The Hill has reached out to the EPA for comment.

When a 1-in-100 year flood washed through the Coorong, it made the vital microbiome of this lagoon healthier

The 2022 floods triggered shifts in the Coorong’s microbiome—similar to our gut bacteria on new diets—revealing why freshwater flows are vital to wetland health.

Darcy Whittaker, CC BYYou might know South Australia’s iconic Coorong from the famous Australian children’s book, Storm Boy, set around this coastal lagoon. This internationally important wetland is sacred to the Ngarrindjeri people and a haven for migratory birds. The lagoon is the final stop for the Murray River’s waters before they reach the sea. Tens of thousands of migratory waterbirds visit annually. Pelicans, plovers, terns and ibises nest, while orange-bellied parrots visit and Murray Cod swim. But there are other important inhabitants – trillions of microscopic organisms. You might not give much thought to the sedimentary microbes of a lagoon. But these tiny microbes in the mud are vital to river ecosystems, quietly cycling nutrients and supporting the food web. Healthy microbes make for a healthy Coorong – and this unassuming lagoon is a key indicator for the health of the entire Murray-Darling Basin. For decades, the Coorong has been in poor health. Low water flows have concentrated salt and an excess of nutrients. But in 2022, torrential rains on the east coast turned into a once-in-a-century flood, which swept down the Murray into the Coorong. In our new research, we took the pulse of the Coorong’s microbiome after this huge flood and found the surging fresh water corrected microbial imbalances. The numbers of methane producing microbes fell while beneficial nutrient-eating bacteria grew. Populations of plants, animals and invertebrates boomed. We can’t just wait for irregular floods – we have to find ways to ensure enough water is left in the river to cleanse the Coorong naturally. Under a scanning electron micrograph, the mixed community of microbes in water is visible. This image shows a seawater sample. Sophie Leterme/Flinders University, CC BY Rivers have microbiomes, just like us Our gut microbes can change after a heavy meal or in response to dietary changes. In humans, a sudden shift in diet can encourage either helpful or harmful microbes. In the same way, aquatic microbes respond to changes in salinity and freshwater flows. Depending on what changes are happening, some species boom and others bust. As water gets saltier in brackish lagoons, communities of microbes have to adapt or die. High salinity often favours microbes with anaerobic metabolisms, meaning they don’t need oxygen. But these tiny lifeforms often produce the highly potent greenhouse gas methane. The microbes in wetlands are a large natural source of the gas. While we know pulses of freshwater are vital for river health, they don’t happen often enough. The waters of the Murray-Darling Basin support most of Australia’s irrigated farming. Negotiations over how to ensure adequate environmental flows have been fraught – and long-running. Water buybacks have improved matters somewhat, but researchers have found the river basin’s ecosystems are not in good condition. Wetlands such as the Coorong are a natural source of methane. The saltier the water gets, the more environmentally harmful microbes flourish – potentially producing more methane. Vincent_Nguyen The Coorong is out of balance A century ago, regular pulses of fresh water from the Murray flushed nutrients and sediment out of the Coorong, helping maintain habitat for fish, waterbirds and the plants and invertebrates they eat. While other catchments discharge into the Coorong, the Murray is by far the major water source. Over the next decades, growth in water use for farming meant less water in the river. In the 1930s, barrages were built near the river’s mouth to control nearby lake levels and prevent high salinity moving upstream in the face of reduced river flows. Major droughts have added further stress. Under these low-flow conditions, salt and nutrients get more and more concentrated, reaching extreme levels due to South Australia’s high rate of evaporation. In response, microbial communities can trigger harmful algae blooms or create low-oxygen “dead zones”, suffocating river life. The big flush of 2022 In 2022, torrential rain fell in many parts of eastern Australia. Rainfall on the inland side of the Great Dividing Range filled rivers in the Murray-Darling Basin. That year became the largest flood since 1956. We set about recording the changes. As the salinity fell in ultra-salty areas, local microbial communities in the sediment were reshuffled. The numbers of methane-producing microbes fell sharply. This means the floods would have temporarily reduced the Coorong’s greenhouse footprint. Christopher Keneally sampling for microbes in the Coorong in 2022. Tyler Dornan, CC BY When we talk about harmful bacteria, we’re referring to microbes that emit greenhouse gases such as methane, drive the accumulation of toxic sulfide (such as Desulfobacteraceae), or cause algae blooms (Cyanobacteria) that can sicken people, fish and wildlife. During the flood, beneficial microbes from groups such as Halanaerobiaceae and Beggiatoaceae grew rapidly, consuming nutrients such as nitrogen, which is extremely high in the Coorong. This is very useful to prevent algae blooms. Beggiatoaceae bacteria also remove toxic sulfide compounds. The floods also let plants and invertebrates bounce back, flushed out salt and supported a healthier food web. On balance, we found the 2022 flood was positive for the Coorong. It’s as if the Coorong switched packets of chips for carrot sticks – the flood pulse reduced harmful bacteria and encouraged beneficial ones. While the variety of microbes shrank in some areas, those remaining performed key functions helping keep the ecosystem in balance. From 2022 to 2023, consistent high flows let native fish and aquatic plants bounce back, in turn improving feeding grounds for birds and allowing black swans to thrive. A group of black swans cruise the Coorong’s waters. Darcy Whittaker, CC BY Floods aren’t enough When enough water is allowed to flow down the Murray to the Coorong, ecosystems get healthier. But the Coorong has been in poor health for decades. It can’t just rely on rare flood events. Next year, policymakers will review the Murray-Darling Basin Plan, which sets the rules for sharing water in Australia’s largest and most economically important river system. Balancing our needs with those of other species is tricky. But if we neglect the environment, we risk more degradation and biodiversity loss in the Coorong. As the climate changes and rising water demands squeeze the basin, decision-makers must keep the water flowing for wildlife. Christopher Keneally receives funding from the Australian Government Department of Climate Change, Energy, the Environment and Water. His research is affiliated with The University of Adelaide and the Goyder Institute for Water Research. Chris is also a committee member and former president of the Biology Society of South Australia, and a member of the Australian Freshwater Sciences Society.Matt Gibbs receives funding from the Australian Government Department of Climate Change, Energy, the Environment and Water. Sophie Leterme receives funding from the Australian Research Council (ARC). Her research is affiliated with Flinders University, with the ARC Training Centre for Biofilm Research & Innovation, and with the Goyder Institute for Water Research.Justin Brookes does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

Murphy, a Beloved Bald Eagle Who Became a Foster Dad, Dies Following Violent Storms in Missouri

A beloved bald eagle who gained popularity after incubating a rock is mourned after dying from head trauma sustained during violent storms in Missouri last week

A beloved bald eagle who gained popularity for incubating a rock in 2023 is being mourned Saturday after the 33-year-old avian died following intense storms that recently moved through Missouri. Murphy, who surpassed the average life span of 25 years, died last week at the World Bird Sanctuary in Valley Park, Missouri. Sanctuary officials believe the violent storms that ripped apart homes and claimed 12 lives last weekend may have factored in the bird's death. They said birds have access to shelters where they can weather storms and the sanctuary has contingency plans for different environmental situations. But evacuations weren't performed since no tornadoes approached the sanctuary. Three other birds who were in the same shelter with Murphy survived. A veterinarian performed a necropsy and found the bald eagle sustained head trauma. “We are unable to determine if Murphy was spooked by something and hit his head while jumping off a perch or if wind and precipitation played a part in the injury,” a statement shared by the sanctuary on social media said. Murphy lived in the sanctuary's Avian Avenue exhibit area and rose to prominence in 2023 when he incubated a rock. His instincts were rewarded when he was allowed to foster an injured eaglet that he nurtured back to health. The eaglet was eventually released back to the wild and another eaglet was entrusted to Murphy's care. The second eaglet is expected to be released into the wild this summer.“In honor of Murphy’s legacy, we plan to name the eventual eagle fostering aviary Murphy’s Manor, so that we can continue to remember him for decades to come,” the sanctuary's statement added.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

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