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New species of clearwing moth from Guyana discovered in Wales

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New species of clearwing moth from Guyana discovered in Wales


New species of clearwing moth from Guyana discovered in Wales
Carmenta brachyclados sp. nov. 1. Holotype ♀ habitus; 2. Pupal exuvium dorsal, NHMUK013700485; 3. Pupal exuvium latero-ventral, NHMUK013700485; 4. Fragment of seedpod of Mora excelsa, NHMUK013700486; 5, 6. Parts of fragment of seedpod showing exit holes and larval workings. Credit: Nota Lepidopterologica (2024). DOI: 10.3897/nl.47.130138

A new species of moth has been described far away from home following a cross-continent detective journey that included Natural History Museum scientists from separate fields, a budding young ecologist with a knack for community science, a globe-trotting photographer, and two moths new to science that traveled more than 4,500 miles from their native country.

The species is a clearwing moth and has been named Carmenta brachyclados, in reference to a characteristically short hindwing vein. Despite having never been catalogued in its native country, Guyana, a surprising sequence of events led to it being described after being spotted flying around a home in Port Talbot, Wales.

The research is published in the journal Nota Lepidopterologica.

In February this year, the new species was spotted flying around the home of ecologist Daisy Cadet and her mother, Ashleigh, a professional photographer. Captured by the moth’s striking appearance, which stood out as being out of the ordinary for a house moth in the U.K. during winter, Daisy uploaded an image to social media which set the chain of events into motion.

Daisy was referred to Natural History Museum lepidoptera experts, Mark Sterling and David Lees, having been advised she had stumbled upon something out of the ordinary by social media users. Mark and David started seeking a match of the Wales specimens in terms of appearance to the clearwing collection contained within the 13.5 million Lepidoptera specimens housed at the NHM—the world’s largest and most diverse collection.

Taking the investigation a step further, Sterling and Lees aided by the museum’s Jordan Beasley, carried out DNA sequencing on the moth and found that its closest match was a group of seed-feeding clearwing moths, Carmenta, which occur in Central America and South America. This finding prompted Daisy to look inside Ashleigh’s bag, which had accompanied her on a photography assignment in Guyana.

Two delicate pupal casings, still intact, were found in the mud from the boots she’d worn on the trip along with a small piece of woody vegetation with what looked like bore holes made by the caterpillars of the moths.

Mark Sterling, a Scientific Associate at the Natural History Museum, commented, “Clearwing moths are notoriously difficult to find, even by professional entomologists. They are even more difficult to rear from larvae or pupae, which usually dry out or go moldy within a few days of collection.

“The chances of two clearwing moths from the Neotropics successfully emerging in South Wales, over three months after they arrived, in cold Welsh winter, and being preserved in good condition, is extraordinary.”

“The improbability of this event defies rational explanation. However, while in Guyana, Ashleigh was told that if she left an offering of tobacco to the jungle spirits she would be shown something beautiful from the jungle, so that is what she did. We conclude in the paper that it must have been very good tobacco.”

Dr. David Lees, Senior Curator for Microlepidoptera at the Natural History Museum, added, “To add to the improbability of this story is the fact that, due to the incredible piece of community science from Daisy, we have photographs of a living holotype (an original specimen which forms the basis of the name and description of that species), which is highly unusual.”

Along with now having a country of origin for this new species, they also had a small piece of the host plant on which the larvae had evidently fed. The plant fragment was sent to Natural History Museum botanist, Sandy Knapp, who advised it was likely to be a seed pod of a species of Mora, a suggestion confirmed by DNA sequencing by Jordan. A large tree from the pea family, Mora excelsa grows in the jungles of Central America and South America.

The next step was to compare Daisy’s moth specimens to the vast number of species within the Carmenta genus—where only half of the 100 described species have been DNA barcoded. Using analyses of DNA and the specimens’ body plan compared to others on record, Mark and David concluded that this was indeed an undescribed species.

More information:
Mark J. Sterling et al, A success for community science: Carmenta brachyclados sp. nov. (Lepidoptera, Sesiidae, Synanthedonini), a clearwing moth from Guyana discovered with its hostplant indoors in Wales (United Kingdom), Nota Lepidopterologica (2024). DOI: 10.3897/nl.47.130138

This story is republished courtesy of Natural History Museum. Read the original story here.

Citation:
New species of clearwing moth from Guyana discovered in Wales (2024, October 3)
retrieved 3 October 2024
from https://phys.org/news/2024-10-species-clearwing-moth-guyana-wales.html

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Hurricane Helene shut down NC mine that is pivotal to world’s semiconductor supply

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Hurricane Helene shut down NC mine that is pivotal to world’s semiconductor supply


solar panel
Credit: Pixabay/CC0 Public Domain

The remnants of Hurricane Helene ripped through the Western North Carolina mountain town of Spruce Pine last week, disrupting a quartz facility integral to the global production of solar panels and semiconductor chips.

The largest Spruce Pine mine is owned by Sibelco, a private Belgium-based mineral company that is Mitchell County’s top employer. Sibelco told The News & Observer that the company has “temporarily halted operations at the Spruce Pine facilities” since Sept. 26.

“The hurricane has caused widespread flooding, power outages, communication disruptions, and damage to critical infrastructure in the area,” the emailed statement said. “Many people in the area, including our employees and their families, are facing displacement and significant disruptions.”

As of Saturday morning, the storm had dumped more than 2 feet of rain on the town, submerging its downtown buildings and overwhelming area roads, railways, utilities, and homes.

Sibelco’s mines are north of downtown in an area called the Spruce Pine Mining District. From above, they look like giant white sandy beaches. The area is set back from the local North Toe River, which flooded.

But news reports indicate surrounding Mitchell County has experienced extensive damage to roads and rail lines, which could impact workers’ ability to get to the site and the company’s ability to transport materials.

The town is home to the purest quartz on the planet, a byproduct of continental formations that occurred more than 380 million years ago. High-purity quartz is essential to making the silicon wafers that get cut into chips. While there are other sources of quartz, the purity many producers demand is only found around the mines of Spruce Pine.

“It is rare, unheard of almost, for a single site to control the global supply of a crucial material,” wrote Ed Conway in his 2023 book “Material World.” “Yet if you want to get high-purity quartz—the kind you need to make those crucibles without which you can’t make silicon wafers—it has to come from Spruce Pine.”

Nowhere else matches the purity

Facility issues have hindered the global supply chain of quartz before. In 2008, a fire at a Spruce Pine quartz refinery “temporarily brought production to a halt and impacted the market,” reported Global Risk Intel, a Washington D.C.-based consulting firm.

Throughout the 20th century, local miners extracted mica and feldspar from the Mitchell County sites, yet, in the past 30 years, escalating demand for newer technologies has made high-purity quartz one of North Carolina’s most important exports. Last year, Sibelco announced it would invest $200 million into the site by 2025 to double production. The company sells its quartz under the brand name IOTA.

“I’ve been sent to Brazil, I’ve been sent to Australia, and nothing matches the final purity of the Spruce Pine quartz,” local geologist Alex Glover said during an interview last March.

More recently, a second company named The Quartz Corp has invested in mines around Spruce Pine. On Tuesday, the company announced it too had stopped operations on Sept. 26, adding “we have no visibility on when they will restart.”

“This is second order of priority,” The Quartz Corp said in an online post. “Our top priority remains the health and safety of our employees and their families.”

Compared to Sibelco’s sites, The Quartz Corp location is closer to the North Toe River, aerial images on Google Maps show.

2024 The Charlotte Observer. Distributed by Tribune Content Agency, LLC.

Citation:
Hurricane Helene shut down NC mine that is pivotal to world’s semiconductor supply (2024, October 3)
retrieved 3 October 2024
from https://techxplore.com/news/2024-10-hurricane-helene-nc-pivotal-world.html

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Economists recognized early on in the pandemic that working from home is here to stay

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Economists recognized early on in the pandemic that working from home is here to stay


work from home
Credit: Unsplash/CC0 Public Domain

When Amazon told staffers last month to come back to the office five days a week, many observers reacted as if an earthquake struck the post-pandemic world of work. To Stanford economist Nicholas Bloom, the news barely registered.

“I doubt it will change anything,” he says, dismissing the notion that Amazon’s mandate means many companies will rescind their work-from-home policies.

By now—more than four years after COVID-19 triggered one of the country’s largest labor shocks since World War II—Bloom and his longtime collaborator Steven Davis of Stanford have gotten used to the frequent headlines questioning the staying power of working from home.

The pair, both senior fellows at the Stanford Institute for Economic Policy Research (SIEPR), have been on the forefront of remote work research from the onset of the pandemic. And the skeptics, they say, are wrong.

Their research finds that, despite the headline-grabbing pullbacks, work-from-home rates are holding steady—with about one-third of the U.S. workforce (quadruple pre-pandemic levels) logging in remotely at least two days a week.

Employees, especially those with children, are willing to take a pay cut and stay in their jobs when given the perk of staying home two or three days a week. And through their studies, they have dispelled as a myth the belief that “the bed, the fridge, and the television” are the enemies of working from home. When managed well, employees on a hybrid schedule are just as productive as they are when in the office.

“The pandemic removed the stigma of working from home and accelerated by a few decades where we would have ended up eventually,” says Davis, the Thomas W. and Susan B. Ford Senior Fellow and director of research at the Hoover Institution.

Remote work’s implications go far beyond workers and their employers. Major cities like San Francisco and Washington, D.C., are grappling with how to respond to declining revenues given the drop in commuters and takeout lunches. Commercial and home real estate markets are shifting. Companies big and small are developing tools and services to improve remote work for employees and businesses.

Research has indicated, too, that there are potential consequences for exacerbating inequality when it’s mostly college-educated workers in higher-paying jobs who get the opportunity to work from home.

“Even burglars have been affected,” says Bloom, the William Eberle Professor of Economics in Stanford’s School of Humanities and Sciences, citing a study of daytime crime rates. “You can’t break into homes when owners are sitting at the coffee table with their laptops.”

Research has and will continue to play a pivotal role in understanding how working remotely is impacting society and the economy, Davis and Bloom say.

In 2022, they organized the first Remote Work Conference at Stanford to examine the latest research and explore unanswered questions. The third annual conference, sponsored by Hoover and SIEPR, is set for Oct. 9–11.

Davis and Bloom’s closest collaborator on work-from-home research is Jose Maria Barrero, a former advisee of Bloom and now an assistant professor of finance at the Instituto Tecnológico Autónomo de México.

“We are only at the end of the beginning of the remote work revolution,” Bloom says, “and the research needed to understand its full effects.”

Remote work’s research desert

Much of the credit for what we know today about working from home dates to 2011—when Davis and Bloom first forged a connection at a National Bureau of Economic Research meeting in Boston. At that time, Bloom was doing some work on perceptions of economic uncertainty, which can slow GDP growth.

Davis, then a professor at the University of Chicago, and Bloom got to talking over beer at the Royal Sonesta hotel about how they might work together to shed light on the hard-to-measure phenomenon of uncertainty.

Five years later, some of the ideas they sketched out that day were published in The Quarterly Journal of Economics. The “Measuring Economic Policy Uncertainty” study, co-authored with Scott Baker of Northwestern University, remains one of the most cited papers in the social sciences of the last 10 years. The three academics have since tracked levels of uncertainty globally and within 30 individual countries.

When COVID lockdowns began in 2020, research into remote work—or telecommuting, as it was long known—was scant. Bloom was one of the few scholars to have published a large-scale study. It centered on a remote-work experiment at a China-based online travel company, Ctrip, that was looking to cut back on office real estate costs.

Released in 2013, and later published in The Quarterly Journal of Economics, the conclusions were mostly positive: Remote employees were more productive, satisfied with their jobs, and less likely to quit. The one downside was that they weren’t promoted as often.

“My thought at the time was, “Okay, this works quite well for some, but probably not for most,'” recalls Bloom. “Even I wasn’t convinced that hybrid work made sense.”

When the CEOs came calling

But the research took on new life when the pandemic hit. With millions of office workers sheltering in place at home, journalists uncovered Bloom’s Ctrip paper and clamored for his insights into what the tectonic labor shift meant.

Bloom and Davis, by now not just research collaborators but also good friends, pivoted. For six years, in addition to their ongoing work in economic uncertainty, they had been examining expectations and managerial practices through a monthly survey of business executives with the Federal Reserve Bank of Atlanta.

In short order, they added questions about how these executives saw the work-from-home experiences at their own firms and their expectations for how it might play out into the future.

Wanting, too, to hear from workers, they recruited Barrero to help design and run the Survey of Working Arrangements and Attitudes, beginning in May 2020.

Roughly 8,000 U.S. workers complete the survey each month. Along with a separate global version, it is now one of the most closely watched measures of changing attitudes and policies around remote work and the basis for multiple papers authored by Bloom, Davis, and Barrero to date.

It didn’t take long for their research to make a big impact. In the fall of 2020—not long after the trio predicted that one-third of U.S. employees would work remotely at least two or three days a week—Fortune 500 CEOs and company directors started reaching out, one by one. They had questions, lots of them, for Bloom and Davis.

The head of one of the country’s largest banks wanted to know whether working from home was just a passing fad or a permanent change. A Big Tech chief executive wondered if he should close company retail stores located near now-vacant financial districts. And the board of a well-known restaurant chain wanted guidance on what to do because nobody was ordering catered office lunches on Mondays and Fridays anymore; they all wanted meals delivered Tuesday through Thursday.

“There was a real tension between what senior managers wanted to have happen and what they were forced to acquiesce to given the new market realities,” says Davis, who joined Stanford in 2023 after more than 35 years at the University of Chicago’s Booth School of Business.

“At one point,” he continues, “we asked workers, ‘How many times has your employer implemented a return-to-office mandate? Is it 1, 2, 3, 4 or 5?'”

Their research, individual and collectively, consistently reaffirms that hybrid work is good business for many companies. In a larger follow-on study of Ctrip, the online Chinese travel agency, that was published in Nature in June, Bloom confirmed his earlier findings, with one notable exception: Hybrid employees’ chances of getting promoted were not affected by remote work.

“The pandemic forced us to experiment with a very different way of working, for weeks and months on end,” Davis says. “And we’ve discovered, contrary to what many economists predicted, that not only does it work well in many settings, but also that we’re getting better at it.”

Citation:
Economists recognized early on in the pandemic that working from home is here to stay (2024, October 3)
retrieved 3 October 2024
from https://phys.org/news/2024-10-economists-early-pandemic-home-stay.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





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Study sheds light on limitations of zooplankton for inactivating pathogen contaminated water

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Study sheds light on limitations of zooplankton for inactivating pathogen contaminated water


UTEP study: Zooplankton go "Eew!" to cleaning feces contaminated water
Scientists were recently surprised to find that the natural community of zooplankton — tiny, aquatic animals known to graze on bacteria — present in freshwater and saltwater do not clean water that is contaminated with fecal microorganisms. Pictured: One of the zooplankton found in the water samples is the adult copepod, a miniature crustacean that is about the size of the period at the end of this sentence. Credit: Lauren Kennedy / UTEP

Scientists at The University of Texas at El Paso and Stanford University were recently surprised to find that the natural community of zooplankton—tiny, aquatic animals known to graze on bacteria—present in freshwater and saltwater do not clean water that is contaminated with fecal microorganisms.

The research, published in the biology journal mSphere, reveals important insights about the limitations of zooplankton in treating bodies of water that have been contaminated with fecal organisms, the team said.

A 2017 U.S. water quality inventory revealed that over 50% of rivers, bays and estuaries were unsafe for at least one use, in many cases because of fecal contamination.

“When sewage is released into clean bodies of water and humans are exposed to it, it can lead to illness in humans,” said Lauren Kennedy, Ph.D., assistant professor of civil engineering at UTEP, who is the corresponding author on the study.

“Our research seeks to understand what factors can render pathogens unable to infect people. In other words, how long does it take for the water to become safe for recreation again without any forms of outside intervention?”

Kennedy explained that water from sewage and septic tanks can accidentally enter bodies of freshwater as a result of accidents, inadequate water treatment or corroded infrastructure.

The authors hypothesized that zooplankton naturally present in water might graze on microorganisms from fecal contamination, inactivating the organisms and effectively “cleaning” the water.

To test this idea, the team added a virus called MS2 and the bacteria E.coli to samples of freshwater and saltwater taken from the San Francisco Bay area of California.

MS2 and E.coli are considered useful proxies for scientific research, Kennedy said, because they are present at high concentrations in sewage and their presence often indicates fecal contamination in the environment. The water samples naturally contained both “large” particles like zooplankton, sand and dirt, and “small” or dissolved particles like salt.

They found that the large particles, including zooplankton, did not have a significant effect on the inactivation of the pathogen proxies. The small particles, however, seemed to have a greater impact. The pathogen proxies were inactivated at higher rates in high-salinity water, for example, ocean water taken from San Pedro Beach.

“I am proud that we were able to provide another perspective to consider for surface water remediation efforts,” Kennedy said.

The research, she added, is an important step forward in understanding the limits of zooplankton as natural “cleaners” of contaminated water. The next phase of the research will focus on the impact of salinity on pathogen survival in contaminated waters.

“I am proud to see this important work coming from our team,” said Carlos Ferregut, Ph.D., chair of the Department of Civil Engineering. “The research by Dr. Kennedy and her team provides valuable insights into the challenges of pathogen inactivation, especially in areas where wastewater can compromise human health.”

More information:
You can bring plankton to fecal indicator organisms, but you cannot make the plankton graze: particle contribution to E. coli and MS2 inactivation in surface waters, mSphere (2024). DOI: 10.1128/msphere.00656-24. journals.asm.org/doi/10.1128/msphere.00656-24

Citation:
Study sheds light on limitations of zooplankton for inactivating pathogen contaminated water (2024, October 3)
retrieved 3 October 2024
from https://phys.org/news/2024-10-limitations-zooplankton-inactivating-pathogen-contaminated.html

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FTC antitrust lawsuit against Amazon will proceed, some claims dropped

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FTC antitrust lawsuit against Amazon will proceed, some claims dropped


amazon
Credit: Unsplash/CC0 Public Domain

The Federal Trade Commission’s antitrust lawsuit against Amazon will proceed, though some claims have been dropped, following a ruling from a federal district judge.

Judge John Chun, from the U.S. District Court in the western district of Washington, partially granted and partially denied Amazon’s motion to dismiss the lawsuit entirely, according to a summary of the filing.

The order is under seal so it’s unclear which parts of the lawsuit will proceed. The FTC has until the end of the month to file a second amended complaint regarding any claims Judge Chun dismissed without prejudice, meaning the claims could resurface.

The FTC and 17 state attorneys general sued Amazon in September 2023, arguing the company unfairly used its position as an ecommerce superstore and fulfillment network provider to keep its rivals from gaining a foothold.

In the sprawling lawsuit, the FTC accused Amazon of promoting its own brands over competitors, preventing third-party sellers from setting discounted prices and forcing merchants to pay steep fees to Amazon itself. For consumers, that meant higher prices, fewer options and a degraded shopping experience, the FTC alleged.

Amazon has denied the allegations, maintaining that the business practices under scrutiny are common across the retail industry and have helped to lower prices for consumers. In a motion asking Chun to dismiss the case in December, Amazon described the lawsuit as an “attack” and an “effort to hobble one of America’s most consumer-focused businesses.”

2024 The Seattle Times. Distributed by Tribune Content Agency, LLC.

Citation:
FTC antitrust lawsuit against Amazon will proceed, some claims dropped (2024, October 3)
retrieved 3 October 2024
from https://techxplore.com/news/2024-10-ftc-antitrust-lawsuit-amazon-proceed.html

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part may be reproduced without the written permission. The content is provided for information purposes only.





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