Connect with us

Science

Snarl, You’re on Candid Camera

Published

on

Snarl, You’re on Candid Camera

In ecology, as in comedy, timing is all the things.

Hours, minutes and even seconds could make the distinction for an animal between stumbling upon a predator and avoiding one, between discovering a bush loaded with berries and discovering branches which have already been gnawed naked. Mere moments can decide whether or not a raccoon comes face-to-face with a bobcat at evening, whether or not a flock of cocky turkeys finds its subject already occupied by cranes, whether or not a deer disappears into the timber earlier than a coyote seems on the scene.

An animal’s fortunes, and the well being of whole ecosystems, can hinge on these ephemeral encounters — or fortunate non-encounters. “An animal have to be on the proper place, on the proper time, to keep away from predators, discover meals, reproduce efficiently,” stated Neil Gilbert, a postdoctoral researcher at Michigan State College.

In that manner, the interactions between the animals in a given ecosystem are like a theatrical manufacturing, he stated, including, “For the manufacturing to be successful, every actor must be onstage, in the correct place, and so they should act and ship their traces on the proper time.”

Now, a brand new examine reveals how people may unwittingly rewrite these ecological scripts, altering how the characters work together and fueling extra interspecies encounters.

Advertisement

To conduct the examine, Dr. Gilbert and his colleagues analyzed photographs captured by Snapshot Wisconsin, a citizen-science challenge run by the Wisconsin Division of Pure Assets. Since 2016, volunteers have deployed greater than 2,000 wildlife cameras throughout the state, capturing tens of tens of millions of photographs of Wisconsin’s fields, farms and forests — and the fauna that frequent them.

Wild animals of various species had been extra more likely to lead overlapping lives — showing at native digital camera websites in faster succession — in human-altered landscapes, like farms, than in additional undisturbed places, comparable to nationwide forests, scientists reported in PNAS final month.

The discovering means that human disturbance can squeeze animals nearer collectively, rising the percentages that they stumble upon one another. “There’s rather less elbow room,” Dr. Gilbert stated.

Though extra analysis is required, that interspecies squeeze may have results comparable to making it more durable for prey to evade predators, intensifying competitors for assets or rising the danger of interspecies illness transmission, the researchers say.

“The compression of species niches will doubtless result in new interactions amongst species with unknown penalties,” Benjamin Zuckerberg, an ecologist on the College of Wisconsin-Madison and an creator of the examine, stated in an e-mail.

Advertisement

The Wisconsin Division of Pure Assets created Snapshot Wisconsin in an effort to gather steady, statewide information — in any respect hours of the day and through all seasons of the 12 months — on native wild animal populations. It depends on a military of volunteer digital camera hosts to put in, monitor and keep wildlife cameras, on each private and non-private land throughout the state.

The cameras, that are triggered by movement and physique warmth, have captured a menagerie of animals going about their on a regular basis lives: bald eagles scavenging within the snow, bear cubs climbing timber, a new child fawn, a bevy of otters gamboling down a grassy path. “It’s simply so many otters,” stated Jennifer Stenglein, a quantitative analysis scientist on the Wisconsin Division of Pure Assets and an creator of the brand new examine.

(The division posts lots of the photographs on Zooniverse, a web-based citizen science platform, the place volunteers from world wide may help determine the creatures in every shot.)

For the brand new examine, the researchers analyzed almost 800,000 photographs of animals captured over the course of 4 years. To evaluate species “co-occurrence,” they calculated how a lot time elapsed between the moments when members of 74 species pairs — turkeys and deer, as an illustration, or coyotes and skunks — appeared at a given digital camera web site.

If coyotes and skunks are routinely exhibiting up in the identical place inside an hour or a day of each other, they’re extra more likely to have habitats and routines that overlap — and to come across each other in the actual world — than if days or perhaps weeks cross between appearances, the scientists reasoned.

Advertisement

The time intervals between detections diverse enormously. Generally the cameras captured the odd animal {couples} in the identical body; different instances, days or perhaps weeks may cross between their appearances.

However total, throughout all animal pairs, the pattern was clear: In comparatively pristine habitats, comparable to nationwide forests, roughly six days elapsed, on common, between detections. In probably the most human-altered habitats, that interval dropped to a median of 4 days.

Over a three-month interval, the researchers estimated, extremely antagonistic pairs — that’s, duos during which one species was more likely to kill the opposite, comparable to bobcats and rabbits or foxes and squirrels — would encounter one another seven extra instances in probably the most extremely disturbed landscapes in contrast with the least disturbed ones. (Even when the animals don’t come face-to-face, merely listening to or smelling a predator can have “dramatic results” on the behaviors of prey species, Dr. Gilbert famous.)

“It is going to be fascinating to see who would be the winners and who would be the losers on this human-compressed area of interest house,” Dr. Zuckerberg stated.

“For instance, will prey and lesser rivals must adapt new defenses or behaviors?” he puzzled. Can they even accomplish that?

Advertisement

The scientists additionally discovered that a lot of the impact gave the impression to be pushed by variations in relative abundance; species comparable to raccoons and squirrels tended to be extra quite a few in human-disturbed landscapes — the place dumpsters overflow and fields are thick with grain — than in wilder ones.

However these variations didn’t fully account for the findings, suggesting that some species may additionally change their habits in human-altered habitats, changing into energetic at totally different instances of day or ranging much less extensively. (Animals with much less house to roam could be extra more likely to collide, like gasoline particles in a shrinking vessel, Dr. Gilbert famous.)

Nonetheless, many questions stay, together with whether or not the findings generalize to different species and ecosystems and what, exactly, is going on when these creatures meet, even when the encounters are caught on digital camera.

How did the bobcat chase off the coyote? Who received the skunk-raccoon face-off? And why does that deer look as if it’s about to kick a snarling opossum within the face? (“Like, what did this poor opossum do?” Dr. Gilbert puzzled.)

Extra broadly, are species like deer and raccoons truly participating with each other after they meet on a darkish path? Or are they merely passing by, like sentient ships within the evening? “It’s troublesome to completely tease aside,” Dr. Zuckerberg stated.

Advertisement

However the examine illustrates the potential for utilizing wildlife cameras to probe facets of animal habits which may in any other case be troublesome to watch, Dr. Stenglein stated.

“We didn’t sit within the subject and watch animals work together,” she stated. “However there’s a lot energy in with the ability to use this path digital camera information to grasp how animals are behaving. It simply, to me, opens up a floodgate of potentialities.”

Continue Reading
Advertisement
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Science

Opinion: Most older Americans who need hearing aids don't use them. Here's how to change that

Published

on

Opinion: Most older Americans who need hearing aids don't use them. Here's how to change that

Having depended on hearing aids for nearly three decades, I’m astounded by the lack of Medicare coverage for devices that can solve a problem afflicting tens of millions of older Americans.

Nearly two-thirds of Americans over age 70 have some degree of hearing loss, and over half of those 75 and older experience impairment serious enough to be considered disabling. But most don’t wear hearing aids.

Because the legislation that created Medicare nearly 60 years ago specifically excluded hearing aids, those who rely on the program’s traditional coverage must pay for them out of pocket. That expense is among the chief barriers to wider use of the devices.

Age-related hearing loss impedes basic communication and the relationships that depend on it. Expanded access to hearing aids could therefore do no less than enable more older Americans to establish and maintain the social connections that are essential to a meaningful life.

Hearing loss is like an invisible, muffling curtain that falls in front of anyone speaking. Asking people to repeat themselves can yield irritated and hurtful responses. And it’s hopeless to ask a soft-spoken person to speak up. Sometimes it’s easier just to nod and smile.

Advertisement

Many older people I know choose to avoid social gatherings altogether because they can’t hear well. Without hearing aids, I’d stay home too.

Hearing loss can harm one’s health in other ways. For example, I’ve written about the need for a comprehensive approach to reducing cancer risk at older ages, including preventive services such as colorectal cancer screening. But these services rely on conversations between patients and their healthcare providers. An older patient’s ability to hear and understand such conversations shouldn’t be taken for granted or ignored.

The Food and Drug Administration did improve access to hearing aids by making some of them available without a prescription in 2022, but the over-the-counter devices are inadequate for serious hearing loss like mine. My private health insurance, meanwhile, started covering hearing aids a few years ago, providing up to $2,500 for them every five years. One hearing aid alone can cost that much or more, however.

Despite its limitations, my private coverage for hearing aids is better than nothing, which is what traditional Medicare provides.

Hearing loss is more common among lower-income people and those without advanced education. The toll from noisy workplaces compounds age-related hearing loss for some. One analysis found that most Americans with a serious hearing disability can’t afford the typical price of hearing aids.

Advertisement

Many of the older adults who can’t come up with these significant out-of-pocket expenses spent their working years in low-wage jobs that our country depends on. Denying them treatment for their hearing loss is a lousy way to treat people who gave years of service to our society.

Although some older adults with hearing loss won’t benefit from hearing aids, Medicare coverage for the devices might encourage more beneficiaries to get their hearing tested so they can get the treatment that’s right for them. And while Medicare coverage alone won’t address the stigma some people associate with hearing aids, the availability of newer, more comfortable and less obvious technology might win over some refuseniks.

Legislation reintroduced with bipartisan support last year would finally correct this glaring gap in Medicare coverage by removing the hearing aid exclusion from the law. There’s no reason to delay action on this any longer. Are our representatives listening?

Mary C. White is an adjunct professor of environmental health at Emory University’s Rollins School of Public Health, a Public Voices fellow at AcademyHealth in partnership with the OpEd Project and a former federal epidemiologist.

Advertisement
Continue Reading

Science

Second human case of bird flu detected in Michigan dairy worker

Published

on

Second human case of bird flu detected in Michigan dairy worker

A second human case of bird flu in a diary worker has been confirmed in Michigan, state and federal health officials announced Wednesday.

The symptoms were mild, consisting of conjunctivitis. The Texas dairy worker who contracted the virus in March also came down with pink eye.

At a press call on Wednesday, Nirav Shah, principal deputy director of the U.S. Centers for Disease Control and Prevention, said the finding was “not unexpected” and that it was a scenario “that we had been preparing for.”

He said that since the discovery of H5N1 in dairy cattle, state and federal health officials have been closely monitoring farmworkers and slaughterhouse workers and urging farmers and farmworker organizations to “be alert, not alarmed.”

Federal officials say they still believe the human health risk of bird flu is low; however, it underscores the need for people who are interacting with infected or potentially infected farm animals or birds to take precautions, including avoiding dead animals and wearing personal protective equipment (PPE) if there’s a need to be in close contact.

Advertisement

Though a nasal swab from the person in Michigan tested negative for influenza, an eye swab from the patient was shipped to the CDC and tested positive for influenza A(H5N1) virus.

This is the third case of H5N1 reported in the United States. A poultry worker in Colorado was identified in 2022.

Although the symptoms in the three farmworkers in the U.S. have been mild, people elsewhere in the world have suffered more severe illness, including death. According to the World Health Organization, between Jan. 1, 2003, and March 28, 2024, there have been 888 cases of human infection from 23 countries; 463 were fatal.

In preparation for a more widespread outbreak, the CDC updated its guidance for PPE in dairies and issued a nationwide order for healthcare providers to be on the lookout for novel influenza.

On Tuesday, the CDC asked clinical laboratories and health departments to increase the number of influenza samples being analyzed “to maximize the likelihood of catching a case of H5N1 in the community,” Shah said.

Advertisement

The US Department of Agriculture is also expanding its surveillance and support by providing $1500 to non-infected farms to beef up biosecurity, and $100 to producers who want to buy inline samplers to test their milk. The agency will also provide $2000 per farm to cover veterinary fees for testing, as well as shipping costs to send those tests to laboratories for analysis.

There have been no cases of H5N1 detected in California’s dairy herds.

Officials said ongoing analysis of the nation’s dairy supply suggests it is safe to consume, Despite the risk to human health being low, an official with the Administration for Strategic Preparedness and Response said it will make Tamiflu available upon request “to jurisdictions that do not have their own stockpile and are responding to pre-symptomatic persons with exposure to confirmed or suspected infected birds, cattle or other animal exposures.”

Dawn O’Connell, assistant secretary of the preparedness agency, said it started the “fill and finish” process for approximately 4.8 million doses of vaccine “that is well matched to the currently circulating strain of H5N1 through the national pre-pandemic influenza vaccine stockpile program.”

She said the decision to get started on H5N1 vaccines was not a response to any heightened concern, but since it takes several months to fill and finish vaccine doses, the agency “thought it made sense given what we were seeing.”

Advertisement
Continue Reading

Science

Gas stoves may contribute to early deaths and childhood asthma, new Stanford study finds

Published

on

Gas stoves may contribute to early deaths and childhood asthma, new Stanford study finds

Lung-irritating pollution created by cooking with gas stoves may be contributing to tens of thousands of premature deaths and cases of childhood asthma in the United States, according to a new study published in the journal Science Advances.

For decades, scientists have known the flames from a gas stovetop produce nitrogen dioxide, a pungent gas that can inflame a person’s lungs when inhaled. But for the first time, a team of researchers from Stanford University and Oakland-based research institute PSE Healthy Energy published a nationwide estimate of the long-term health consequences associated with cooking with natural gas and propane stoves.

Researchers concluded that exposure to nitrogen dioxide emissions alone may contribute to nearly 19,000 premature deaths in the United States each year. It has also resulted in as many as 200,000 current cases of pediatric asthma compared with cooking with electric stoves, which do not produce nitrogen dioxide.

Aggressive and impactful reporting on climate change, the environment, health and science.

Advertisement

Stanford researcher Yannai Kashtan noted higher levels of pollution were correlated with the amount of gas that was burned. But pollution also accumulated at higher levels inside smaller homes.

“If you live in a smaller house, you’re exposed to more pollution, and that can lead to income and racial disparities in exposure,” Kashtan said. “In general, folks living in neighborhoods with higher levels of outdoor pollution also tend to have higher indoor pollution. So this environmental injustice extends indoors as well.”

The American Gas Assn., a trade organization representing more than 200 local energy companies nationwide, dismissed the findings as “misleading and unsupported.”

“Despite the impressive names on this study, the data presented here clearly does not support any linkages between gas stoves and childhood asthma or adult mortality,” the association’s president and CEO, Karen Harbert said in a statement earlier this month.

Advertisement

The study is the latest examining the serious health effects associated with breathing fumes from gas stoves, which release planet-warming carbon emissions and a variety of air pollutants. In recent years, the popular household appliance has become a political hot-button issue as policymakers and regulators have weighed environmental impacts against consumer choice.

Many large cities in California, including Los Angeles, have moved toward phasing out gas stoves in newly constructed residences. Earlier this month, the California Assembly advanced a bill to the Senate that would require gas stoves to come with warning labels detailing the pollution and health effects that can arise from cooking with gas.

Gas stoves emit a variety of pollutants, including asphyxiating carbon monoxide, cancer-causing formaldehyde and benzene. The flame also creates nitrogen dioxide, a precursor to smog and a pollutant that can cause difficulty breathing.

Environmental groups say consumers should be notified about these pollutants and the potential harm they can cause.

“Gas stoves create pollution in our homes, increasing the risk of childhood asthma and other respiratory problems for our families,” said Jenn Engstrom, state director for California Public Interest Research Group. “However, this risk has largely been hidden from the public. Consumers deserve the truth when it comes to the danger of cooking with gas. Warning labels will give consumers what they need to make informed decisions when they purchase appliances for their homes.”

Advertisement

Kashtan and other researchers had previously discovered cooking with gas stoves presented a similar cancer risk as inhaling second-hand cigarette smoke. They also found some gas stoves leaked contaminants even when the burners were off.

The effects are especially devastating to children, whose smaller and still-developing lungs need to take more breaths than adults, Kashtan said. Older adults, especially those with cardiovascular or respiratory illness, are also more vulnerable to pollution from gas stoves.

To alleviate indoor air pollution, experts recommend using ventilation hoods and opening windows while cooking,

Starting in 2008, California required new and redeveloped homes to have ventilation that could prevent pollution from building up indoors. But during their research, measuring emissions in more than 100 households across the country, Yannai said they found many kitchens didn’t have ventilation hoods at all.

Although the health effects of breathing these pollutants are clear, researchers still wonder to what degree these conditions could be reversible. As communities take steps to mitigate their exposure or transition away, he said we could soon see the results.

Advertisement

“It’s never too late to stop breathing in pollution,” he said.

Continue Reading

Trending