Monday, April 27, 2020

Among the reasons COVID-19 is worse for black communities: Police violence

police
Credit: CC0 Public Domain
There are various reasons COVID-19 is killing black people at six times the rate of white people, including a lack of access to health care, and poor environmental conditions in black communities.
But one largely unexamined contributor to the disparity, according to a panel of UC Berkeley experts, is the trauma and stress caused by police violence in those communities, and the physical toll of that violence.
"There are levels of chronic stress associated with living in an environment that has more police violence, and the threat of that force on its residents," said Denise Herd, a professor at the School of Public Health who recently examined how that stress can lead to disease in her paper "Cycles of Threat: Graham V. Connor, Police Violence and African American Health Inequities," which will be published in an upcoming issue of the Boston University Law Review.
With the world still in the grips of the pandemic, there is no specific research relating COVID-19 cases to , but Herd said the connection between the chronic stress caused by persistent police-related trauma, and diseases like asthma, diabetes, hypertension and heart disease, which has led to COVID-19 mortality, is clear.
"Those mental health issues often go untreated in African American communities and can lead to diseases that make them more compromised to COVID-19," she added.
Another potentially complicating factor is that asking black people, especially black men, to wear masks, as many public health authorities are requiring, may invite unwarranted attention from police, who have falsely profiled black men as criminals.
"It's a corollary to the 'hoodie' argument from a few years ago, where it is not uncommon for racial minorities wearing hoodies to be considered a threat, while others freely wear them without fear of harassment," said Osagie Obasogie, a Berkeley professor of bioethics.
"Everyday racism continues to be a more immediate concern to communities of color than a pandemic, so some people may decline to wear masks," he added.
"Two Americas, two epidemics'
Herd, who is also associate director of Berkeley's Othering and Belonging Institute, pointed to an array of studies showing black people are more likely to face poor treatment from  that includes being stopped, injured or even killed by police.
One study, conducted from 2001 to 2014, analyzed 683,000 injuries caused by police that prompted treatment in emergency rooms across the country. The data found that black people were nearly five times more likely to experience police-related injuries than white people, and they also experienced a mortality rate from those injuries twice as high as white patients.
Moreover, Herd said the use of so-called Terry stops, or stop-and-frisk policies, that allow police officers to question, search or detain people they suspect are involved in criminal activity, have been used as a way to hyper-police black communities, creating chronic stress that lowers a person's resistance to disease.
Herd referenced data from the New York Civil Liberties Union that showed between 2004 and 2012, four million Terry stops were conducted predominantly on black and Latino pedestrians. In 2011 alone, 90% of pedestrians stopped were either black or Latino, and 20% of the time police used physical force.
Another study found that men who reported a high number of police stops in their lifetimes were also three times more likely to exhibit post-traumatic stress disorder symptoms and high levels of anxiety and stress.
There isn't just one reason for the health problems in these communities, said Herd. Access to green spaces, affordable housing and other economic factors also play a role. But forms of discrimination and unfair treatment by law enforcement are linked with higher rates of disease in , she said.
In her paper, Herd pointed to research showing that in neighborhoods where pedestrians were more likely to be questioned by police, there was a prevalence of high blood pressure, diabetes, asthma and obesity; health outcomes proven to cause severe COVID-19 symptoms in patients infected with the disease.
"We don't have all the data in yet, but it looks like it's two Americas, two epidemics," said Herd. "In the profile that we saw with affluent white people who had the disease first, it was because of international travel, and the cases tended to be within the older population. I don't think that's going to be true for the African American population. We do also see younger African American people dying."
Wearing a face mask while black
While wearing a  in public to stop the spread of COVID-19 may seem like common sense for some, for people of color, particularly black men, wearing or not wearing a mask while out can be a double-edged sword.
Erin Kerrison, an assistant professor at Berkeley's social welfare school who studies how law and legal institutions operate as social determinants of health, said that because of the distrust  have toward law enforcement, they may not wear masks in public to avoid being viewed as criminals.
"Due to the psychological harm and damage done in those stop-and-frisk encounters, and often the unwarranted harassment, there is a feeling that the police treat them as guilty until proven innocent," Kerrison said,
For example, following the 2012 shooting and killing of Trayvon Martin, a young black teenager walking around his Florida neighborhood, some people said the killing was justified because "he looked shady," Kerrison said.
"What law enforcement views as a public-safety threat is deeply racialized," said Kerrison. "So, it is a common practice for black citizens to limit, if not altogether avoid, any sort of trigger that would lead to an encounter with a  officer."
Study suggests increasing community connection between police and young black men could reduce violent encounters

Fins from endangered hammerhead sharks in Hong Kong market traced mainly to Eastern Pacific

by Angela Nicoletti, Florida International University

Credit: Stan Shea

For the first time, researchers have traced the origins of shark fins from the retail market in Hong Kong back to the location where the sharks were first caught. This will allow them to identify "high-risk" supply chains for illegal trade and better enforce international trade regulations.


Marine Scientist Demian Chapman from Florida International University in Miami, led a team based in the United States and Hong Kong—the Special Administrative Region of the People's Republic of China—to conduct DNA analysis on shark fins from scalloped hammerhead sharks (Sphyrna lewini). One of the most common and valuable species in the trade, these sharks face an increasing risk of overexploitation—and possibly extinction.

Many female sharks go "home" to a specific region to give birth. This makes it possible for researchers to identify where a shark was born from the DNA it inherits from its mother. This DNA is present in dried, processed shark fins. The team compared the DNA from fin trimmings collected from dried seafood shops in Hong Kong to a global database of genetic samples collected by scientists from all over the world and were able to determine where the sharks originally came from.

Testing revealed the majority of fins originated from the Eastern Pacific—the coastal strip extending from Baja California to Northern Peru—where vanishing scalloped hammerhead populations are listed as "Endangered" under the U.S. Endangered Species Act. The Eastern Pacific also includes famous island chains like Galapagos and Cocos where tourists go to dive with schools of scalloped hammerheads.

For a species like the scalloped hammerhead, where certain populations in different parts of the world are in severe decline, location information is key for implementing trade restrictions and conducting better fisheries management.

Scalloped hammerhead in Hawaii. Credit: Deron Verbeck

"The shark fin trade is a global market and international trade regulations are part of the solution to better manage threatened species like the scalloped hammerhead" Chapman said. "DNA detective work like this helps us understand which regions in the world are most heavily fishing this species and can narrow down where conservation interventions are needed most."


In 2013, scalloped hammerhead sharks received protection by Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)—an international agreement protecting animals and plants from over-exploitation in international trade. Listed in Appendix II, all trade of these sharks requires permits certifying they were legally caught and traceable through the supply chain.

Shortly afterward, Chapman and the team conducted DNA testing on more than 9,200 shark fin trimmings and found threatened species continue to be found in the Hong Kong retail market. Scalloped hammerheads were the fourth most common out of more than 80 shark species found and the team estimated that around 60% of them came from the Pacific coast of South and Central America.

This study highlights the global nature of the fin trade and emphasizes the need for increased monitoring and better implementation of CITES regulations throughout the world, particularly in the Eastern Pacific. Chapman also points out that the United States plays an important role in intercepting illegal shipments, since many shipments from the Eastern Pacific pass through major U.S. ports before reaching Asia.

The research is supported by the Pew Charitable Trusts, The Pew Fellowship Program and the Roe Foundation. The findings were published this week in Animal Conservation.


Explore further   US moves to protect scalloped hammerhead sharks


More information: A. T. Fields et al. DNA Zip‐coding: identifying the source populations supplying the international trade of a critically endangered coastal shark, Animal Conservation (2020). DOI: 10.1111/acv.12585


Researchers offer glimpse into dinosaur ecosystems
by Jeffrey Renaud, University of Western Ontario
About 75 million years ago, southern Alberta was a lush and warm coastal floodplain rich in plant and animal life, similar to Louisiana’s environment today. Credit: Luke Dickey // Special to Western News

By casting an eye into the daily lives of dinosaurs millions of years in the past, Western researchers may be helping humanity get a glimpse of its future.


Seventy-five-million years ago, North America was divided into western and eastern landmasses by a shallow inland sea. The west was home to an extremely rich diversity of dinosaurs; it has been a mystery as to how so many big animals co-existed in such a small area.

Researchers have proposed that diversity was maintained by dividing up the landscape and food sources. For example, horned dinosaurs (ceratopsians) may have stuck to coastal areas, while duck-billed dinosaurs (hadrosaurs) preferred more inland habitats.

This idea remained untested, however, as researchers cannot directly observe dinosaur behavior and ecosystems.

To solve this conundrum, a team including Western researchers has now compared the compositions of stable isotopes in fossil teeth from these dinosaurs.

Stable isotopes are naturally occurring varieties of chemical elements (like carbon or oxygen) that do not change into other elements over time. When animals consume food and water, the stable isotopes of the elements that make up those resources are passed to the animal's tissues, including tooth enamel.

The stable carbon and oxygen isotope compositions of these herbivorous dinosaurs were measured using various methods. The primary approach was laser gas chromatography isotope ratio mass spectrometry conducted at Western's Laboratory for Stable Isotope Science (LSIS) by Anthropology professor Fred Longstaffe, Western research scientist Li Huang and project lead Thomas Cullen of the Field Museum.

"This approach allowed us to analyze very small samples and, because of that, extend the science of isotope ecology back into the time of the dinosaurs," said Longstaffe, Canada Research Chair in Stable Isotope Science. "Normally, my isotope ecology work is focused on Ice Age animals and the reasons for their disappearance or survival. To attempt to reach back much deeper to the time when the dinosaurs lived was both challenging and exciting."

The study, "Large-scale stable isotope characterization of a Late Cretaceous dinosaur-dominated ecosystem," was recently published in the journal Geology.

The researchers compared results for numerous individuals of each dinosaur species to those of other animals in this ancient ecosystem. While multiple ecological patterns are evident in the results, and differences found in some species, the stable carbon and oxygen isotope ranges for large herbivorous dinosaurs were found to strongly overlap, providing direct evidence against the habitat use hypothesis.

"Measuring the ratios of the different isotopes of elements such as carbon or oxygen in tissues like tooth enamel gives us a unique window into the diet and habitat of an animal who has been extinct for millions of years," Cullen said.

"Dinosaurs lived in a weird world: broad-leafed and flowering plants were much less common; it was warm enough in high latitudes to support crocodilians; carbon dioxide in the atmosphere was higher than it is today; and there was little to no ice at the poles.

"It's not like anything we, as humans, have any direct experience with—but it may be the direction we are headed. It's critical that we understand how ecosystems and environments function under those sorts of conditions so we can better prepare ourselves for the future."

The new study is one of the largest ever conducted on a dinosaur ancient ecosystem, involving more than 350 isotopic measurements from 17 different species whose fossils had all accumulated in a single ancient wetland deposit. Even more uniquely, the authors combined this information with measurements from 16 living species that the team previously sampled from a modern coastal wetland in Louisiana.

About 75 million years ago, southern Alberta was a lush and warm coastal floodplain rich in plant and animal life, similar to Louisiana's environment today.


Explore furtherLate cretaceous dinosaur-dominated ecosystem

More information: T.M. Cullen et al. Large-scale stable isotope characterization of a Late Cretaceous dinosaur-dominated ecosystem, Geology (2020). DOI: 10.1130/G47399.1
Journal information: Geology

New species of turtle discovered


by Senckenberg Research Institute and Natural History Museum

Based on genetic analyses, a second species of mata mata turtle was discovered. 
Credit: Rune Midtgaard

Together with an international team, Senckenberg scientist Uwe Fritz described a new species of mata mata turtle based on genetic analyses. Until now, it had been assumed that the genus Chelus only contained a single species. The new description also necessitates a reassessment of the conservation status of these species, which are frequently sold in the illegal animal trade. The study was recently published in the scientific journal Molecular Phylogenetics and Evolution.


There is a good reason for the bizarre appearance of the mata mata turtle: hidden in the mud under water, the up to 53-centimeter-long animals look like algae-covered rocks. But when a prey animal approaches, the turtle sucks it in by suddenly opening its large mouth and swallows it whole. "Although these turtles are widely known due to their bizarre looks and their unusual feeding behavior, surprisingly little is known about their variability and genetics," explains Professor Dr. Uwe Fritz of the Senckenberg Natural History Collections in Dresden, and he continues, "Until now, we assumed that there is only one species of this armored reptile that ranges widely across South America."

But such supposedly widespread species, which are not considered endangered, can be full of surprises—based on genetic analyses, they are often split into two or more independent species. "Several studies have pointed out individual mata mata turtles look differently in the Orinoco River compared to the Amazon Basin. Based on this observation, we decided to take a closer look at these animals' genetic makeup," adds the scientist from Dresden.
The newly described species Chelus orinocensis is found in the Orinoco and Río Negro basins. Credit: Mónica A. Morales-Betancourt

Using 75 DNA samples, the researchers were able to show that, contrary to previous assumptions, there are two genetically and morphologically well-differentiated species of mata mata turtles. The newly described species Chelus orinocensis inhabits the Orinoco and Río Negro basins, while the species known as Chelus fimbriata is restricted exclusively to the Amazon basin.

According to the study, the two species split during the late Miocene, around 13 million years ago. During this period, the former Amazon-Orinoco Basin began separating into the two river basins known today. Numerous aquatic animal species were thus spatially separated and began to diverge genetically.

The description of the new species also necessitates a reassessment of the mata mata's conservation status. "To date, this species was not considered endangered, based on its widespread distribution. However, our results show that, due to the split into two species, the population size of each species is smaller than previously assumed. In addition, every year, thousands of these bizarre-looking animals end up in the illegal animal trade and are confiscated by the authorities. We must protect these fascinating animals before it is too late," adds the study's lead author, Professor Mario Vargas-Ramírez, a former researcher of Senckenberg who now works at the National University of Colombia in Bogotá.

Explore furtherNewly discovered turtle species is facing extinction

More information: Mario Vargas-Ramírez et al. Genomic analyses reveal two species of the matamata (Testudines: Chelidae: Chelus spp.) and clarify their phylogeography, Molecular Phylogenetics and Evolution (2020). DOI: 10.1016/j.ympev.2020.106823
Video: The muddle in the middle-Pleistocene
by Wits University

Credit: CC0 Public Domain

During the late middle Pleistocene—between 400 000 and 150 0000 years ago—the populations occupying Earth, and Africa specifically, looked very differently from what they do now. There is evidence for at least three forms of human relatives inhabiting Africa, including Homo heidelbergensis, Homo naledi and Homo sapiens (modern humans).

Some, or all of these hominids made tools such as those associated with the middle stone age culture that began around 305 000 years ago. The question is, which of these human relatives got so crafty? Traditionally, it is thought that the larger brained species like Homo heidelbergensis and Homo sapiens should be associated with more complicated tool kits. But the answers may not be so simple. With three forms of early human relatives around, things are much more complicated, explains Professor Lee Berger.

'Dino Cave' reveals dinosaur crouch walkers


'Dino Cave' reveals dinosaur crouch walkers
Credit: University of Queensland
Old photos from Mount Morgan's sealed off "Dino Cave' have shed light onto new and unusual Aussie dinosaur behaviours, thanks to University of Queensland research.
For a decade, a Mount Morgan cave in central Queensland known for the highest dinosaur track diversity on the entire eastern half of Australia has been closed to the public, restricting research to the site.
Although UQ palaeontologist Dr. Anthony Romilio has had success searching for images of the tracks, he has only recently been provided with new images of different dinosaur's footprints at the site by the Mount Morgan Historical Museum.
"These photographs of fossil footprints have been on museum-display for years," Dr. Romilio said.
"Up until now, it was unknown what type of  made these tracks or what the tracks meant.
"A typical dinosaur track of this kind look like those made by birds, but these are shaped like broad-handled forks."
Upon further inspection, Dr. Romilio revealed that the dinosaur must have created the tracks while crouched.
"It's very strange behaviour, and we don't yet know why it did this," Dr. Romilio said.
"You can rule out predatory stalking behaviour, as this set of tracks was made by a two-legged plant eater called an ornithopod.

'Dino Cave' reveals dinosaur crouch walkers
Reconstruction of Mount Morgan dinosaur track-makers on their ancient landscape. Credit: Dr Anthony Romilio
"And interestingly, this crouching dinosaur was taking bigger steps than other 'normal' walking dinosaurs.
"This unusual posture likely made the prehistoric animal more stable allowing them to quickly cross the muddy shore of an ancient lake."
Dr. Romilio is keen to investigate this mysterious dinosaur despite all of the unknowns.
"There are nine sites in the "Dinosaur Caves' that contain fossil footprints," Dr. Romilio said.
"Where exactly these photos were taken, and when, we just don't know.
"Many of the Mount Morgan track sites were mapped in the early 2000s, although these footprints don't appear on any of them.
"It may be that these fossils had already eroded, making these, and other old photos like them, so incredibly important, as they're our only record of these creature's existence."
The research has been published in Historical Biology.
Solved: The mystery surrounding dinosaur footprints on a cave ceiling

More information: Anthony Romilio. Additional notes on the Mount Morgan dinosaur tracks from the Lower Jurassic (Sinemurian) Razorback beds, Queensland, Australia., Historical Biology (2020). DOI: 10.1080/08912963.2020.1755853
Tomanowos: The meteorite that survived mega-floods and human folly

by Daniel Garcia-Castellanos, The Conversation

Surface detail of the Tomanowos meteorite, showing cavities produced by dissolution of iron. Credit: Eden, Janine and Jim/Wikipedia, CC BY

The rock with arguably the most fascinating story on Earth has an ancient name: Tomanowos. It means "the visitor from heaven" in the extinct language of Oregon's Clackamas Indian tribe.


The Clackamas revered the Tomanowos—also known as the Willamette meteorite – believing it came to unite heaven, earth and water for their people.

Rare extraterrestrial rocks like Tomanowos have a kind of fatal attraction for us humans. When European Americans found the pockmarked, 15-ton rock near the Willamette River more than a century ago, Tomanowos went through a violent uprooting, a series of lawsuits and a period under armed guard. It's one of the strangest rock stories I've come across in my years as a geoscientist. But let me start the tale from its real beginning, billions of years ago.

History of a rock

Tomanowos is a 15-ton meteorite made, as most metal meteorites are, of iron with about 8% nickel mixed in. These iron and nickel atoms were formed at the core of large stars that ended their lives in supernovae explosions.

Those massive explosions spattered outer space with the products of nuclear fusion—raw elements that then ended up in a nebula, or cloud of dust and gas.

Eventually the elements were forced together by gravity, forming the earliest planet-like orbs, or protoplanets of our solar system.
Supernovae disperse the iron produced in heavy stars. Credit: NASA

Some 4.5 billion years ago, Tomanowos was part of the core of one of these protoplanets, where heavier metals like iron and nickel accumulate.

Some time after that, this protoplanet must have collided with another planetary body, sending this meteorite and an unknowable number of other chunks back out into space.

Riding the flood

Subsequent impacts over billions of years eventually pushed Tomanowos' orbit across that of the Earth. As a result of this cosmic billiards game, the Tomanowos meteorite entered Earth's atmosphere around 17,000 years ago and landed on an ice cap in Canada.


Over the following decades, flowing ice slowly transported Tomanowos southwards, towards a glacier in the Fork River of Montana in what is now the United States. This glacier had created a 2,000-foot-high ice dam across the river, impounding the enormous Lake Missoula upstream.

The ice dam crumbled when Tomanowos was nearing it, releasing one of the largest floods ever documented: the Missoula Floods, which shaped the Scablands of Washington State with the power of several thousand Niagara Falls.

Trapped in ice and rafted down river by the flood, Tomanowos crossed modern-day Idaho, Washington and Oregon along the swollen Columbia River at speeds sometimes faster than 40 miles per hour, according to simulations by modern geologists. While floating near what's now the city of Portland, the meteorite's ice case broke apart, and Tomanowos sank to the river bottom.

It is one of hundreds of other "erratic" rocks—rocks made of elements that do not match the local geology—that have been found along the Columbia River. All are souvenirs from the cataclysmic Missoula floods, but none is as rare as Tomanowos.
Geological evidence of the Missoula Flood includes prairie ripple marks and layered silt deposits.

A rock worth suing for

As flood waters ebbed, Tomanowos was exposed to the elements. Over thousands of years, rain mixed with iron sulfide in the meteorite. This produced sulfuric acid that gradually dissolved the exposed side of the rock, creating the cratered surface it bears today.

Several thousand years after the Missoula floods, the Clackamas arrived to Oregon and discovered the meteorite. Did they know it came from the heavens, despite the lack of a crater? The name Tomanowos, or Visitor from the Sky, suggests that they may have suspected the rock's extraterrestrial origins.

Millennia of peaceful rest in the Willamette valley ended in 1902 when an Oregon man named Ellis Hughes secretly moved the iron rock to his own land and claimed it as his property.

Hauling a 15-ton rock on a wooden cart for nearly a mile without being noticed wasn't easy, even in the Wild West. Hughes and his son labored for three back-breaking months. Once the meteorite was on his land, he began charging admission to view the "Willamette Meteorite."

In fact, however, the legitimate owner of the iron rock turned out to be the Oregon Iron and Steel Company, which owned the land where Hughes had found the meteorite and sued for its return. While the suit worked its way through the courts, the company hired a guard who sat atop Tomanowos 24 hours a day with a loaded gun. They won the case in 1905, and sold Tomanowos to the American Museum of Natural History in New York a year later.
Present display of the Tomanowos meteorite, American Museum of Natural History. Credit: Daniel Garcia-Castellanos, CC BY-ND

Floods

Today Tomanowos can be seen in the museum's Hall of the Universe exhibition, which still refers to it as the Willamette Meteorite. In 2000 the museum signed an agreement with descendants of the Clackamas tribe, recognizing the meteorite's spiritual significance to the Native people of Oregon.

The Confederated Tribes of Grand Ronde hold an annual ceremonial visit with the ancient rock that, as their ancestors so aptly observed, brought the sky and the water together here on Earth. In 2019 several fragments of the meteorite that had been held separately were returned to the tribe.

But the museum's written display tells only some of the rock's long story. It omits the Missoula Floods, despite the significance of this event for modern earth science.

Decades after geologists J. Harlen Bretz and Joseph T. Pardee separately posited the theory of the Missoula floods in the early 20th century, their research was used to explain how Tomanowos reached Oregon, where it was found. Their work also triggered one of the most significant paradigm shifts in recent geoscience: the recognition that catastrophic flooding events significantly contribute to the erosion and evolution of landscape

Previously, scientists had followed Lyell's principle of uniformitarianism, which held that Earth's landscape was sculpted by regular, natural processes distributed evenly over long times. Normal floods fit into this theory, but the notion of swift, catastrophic events like the Missoula Floods were somewhat heretic.

The idea of huge Ice Age floods helped geologists a century ago prevail over pre-scientific, religious explanations for unusual finds—such as how marine fossils could be found at high elevation, and how a giant metal rock from outer space came to rest in Oregon.


Explore furtherRock used as doorstop is actually a meteorite worth $100K

Provided by The Conversation

Delivering animal vaccines and antibodies to protect humans from diseases like COVID-19

Delivering animal vaccines and antibodies to protect humans from diseases like COVID-19
Credit: Vdjokich, Shutterstock
Zoonoses—diseases that can spread between animals and humans, like avian influenza, rabies and severe acute respiratory syndrome—comprise a large percentage of all newly identified infectious diseases. As they represent a persistent global threat to public health, scientists are striving to develop strategies that effectively tackle widespread outbreaks, such as the novel coronavirus disease (COVID-19).
The EU-funded ZAPI project was at the forefront of this endeavor. Launched in March 2015, it has focused on establishing a swift response to major new infectious disease threats in Europe and across the world. It did so by designing new manufacturing processes for delivering effective and rapid control tools (vaccines, antibodies) against (re-)emerging  with pandemic potential. Bringing together human and veterinary research institutions, NGOs, , expert academic groups, and vaccine and biotech manufacturers, ZAPI used the "One Health' approach. According to the World Health Organization (WHO), the One Health approach involves designing and implementing programs, policies, legislation and research in which several sectors work together to achieve better  outcomes. A WHO Q&A document states: "Many of the same microbes infect animals and humans, as they share the eco-systems they live in. Efforts by just one sector cannot prevent or eliminate the problem. For instance, rabies in humans is effectively prevented only by targeting the animal source of the virus (for example, by vaccinating dogs)."
Using recent zoonotic models
ZAPI, which has worked on tackling outbreaks like those caused by coronavirus, used three different prototype models of diseases appearing in recent years that are zoonotic in nature. These are Middle East respiratory syndrome coronavirus (MERS-CoV), Schmallenberg virus (SBV) and Rift Valley fever virus (RVFV). MERS-CoV, causing severe lower respiratory tract disease in humans, was first identified in Saudi Arabia in 2012. Dromedary camels are a major animal source of infection in humans. RVFV, which is transmitted by mosquitoes, primarily affects animals but also has the capacity to infect humans. SBV is a novel Orthobunyavirus that has been associated with  in ruminants (cattle, sheep and goats) and was initially reported in 2011 in Europe. It's unlikely that SBV may pose a risk to humans, according to the European Centre for Disease Prevention and Control. MERS-CoV and SARS-CoV-2, the virus responsible for the COVID-19 pandemic, are genetically related, as noted in a news item.
In the same news item, Jean-Christophe Audonnet from project coordinator Merial Animal Health Ltd, part of the Boehringer Group of Companies since 2017, says: "A platform is a generic methodology or technology that can be used for multiple targets; in the case of vaccines, the only thing that will change will be the immunogen. It's an assembly of different components, so the way we manufacture the vaccine will always be the same." He adds that although it's unlikely to produce technology that can address every single new virus, "the ZAPI system design is flexible enough to address about 90% of all the targets that we can face."
The outcomes of ZAPI (Zoonotic Anticipation and Preparedness Initiative) can be directly applied to SARS-CoV-2, according to Dr. Audonnet. "It's a real life experiment now for us. A factor that we need to explore better through dialog is how we can reduce the timelines for the key decisions—political and regulatory ones," he says.
Studying animal coronavirus defences is opening route to human treatments

More information: ZAPI project website: http://zapi-imi.eu/

Long-term efficacy of managed wildfires in restoration efforts

wildfire
Credit: CC0 Public Domain
Land managers are increasingly interested in using lightning-ignited wildfires as a tool to restore forests and reduce fuel loads. But little is known about the effectiveness of managing wildfires to meet restoration goals.
For several years, ecologists at the Ecological Restoration Institute at Northern Arizona University have been working to better understand ecological outcomes of wildfires managed to achieve resource objectives and conditions under which practitioners can expect beneficial results.
A new article in the International Journal of Wildland Fire contributes to this line of research by testing the  of managed wildfire on three different  types (pine-oak, mixed-conifer, and spruce fir).
To examine the long-term impacts of  applications, a team of ERI-NAU ecologists remeasured permanent monitoring plots on the North Rim of Grand Canyon National Park 12 years after three wildfires were allowed to burn to meet resource objectives in 2003. The ecologists evaluated fire outcomes and measured effects on forest structure—for example, tree density—and species composition (the relative numbers of different tree species) over time.
Mike Stoddard, an ERI senior research specialist and lead author of the study, said managing for forests that are resilient to  and severe fire can require bold management to overcome more than a century of fire exclusion. But, he added, it is important that these management decisions are informed by science.
And while wildfires managed under mild weather conditions may be less expensive than other treatment methods, like mechanical thinning or prescribed fire, more research is needed to understand tradeoffs between methods in terms of ecological outcomes.
"Wildfires can accomplish a range of management objectives and some may build resilience to a changing climate, at least in the short-term," Stoddard said. "However, delayed effects on tree mortality and tree regeneration may shift our perception of the efficacy of fire treatment."
Overall, the 2003 resource objective wildfires in Grand Canyon National Park achieved several beneficial management outcomes, but researchers say there is much more to learn about the effectiveness of wildfires at accomplishing restoration objectives and promoting resilient forest conditions, particularly in less-remote areas.
Mixed-conifer forests at risk for high-severity wildfire

More information: Michael T. Stoddard et al. Ecosystem management applications of resource objective wildfires in forests of the Grand Canyon National Park, USA, International Journal of Wildland Fire (2020). DOI: 10.1071/WF19067

Climate change may push some species to higher elevations—and out of harm's way

Climate change may push some species to higher elevations -- and out of harm's way
Human pressure from agriculture, livestock grazing, and development is often more intense at mountain bases, as in this Himalayan landscape in north India. Species shifting upslope tracking rising temperatures may find more intact habitats. Credit: Paul R. Elsen WCS
A new WCS-led study reveals that mountain-dwelling species fleeing warming temperatures by retreating to higher elevations may find refuge from reduced human pressure.
A new study published in Nature Communications by scientists at WCS, the University of California, Berkeley, and the United States Forest Service shows that nearly 60 percent of all mountainous area is under intense human pressure. Most of the pressure is at low elevations and mountain bases, which tend to be easier places for people to live, grow food, and build roads. The scientists then used  models to make predictions about how species would move under climate change. Based on their predictions, they found that species tend to move to higher elevations, and that these higher elevations tend to have more intact land for species because there is less human pressure.
Without factoring in human pressure, the authors warn that conservation actions may be misguided. Factoring in human pressure reveals the true 'shape' of a mountain for species that are restricted to intact landscapes, which are often the species of greatest conservation concern. Here, the 'true shape' refers to how much land area is potentially available as habitat for a species as it moves up in , not simply how much total land area is available. The true shape can reveal where species will tend to lose versus gain intact land area as they shift under climate change: the elevations where species are expected to lose area represent the priority zones for conservation.
Mountains are home to over 85 percent of the world's amphibians, birds, and mammals, making them global conservation priorities. But mountain-dwelling species are at risk from human activities, such as agriculture, livestock grazing, and development that reduce their habitat, and climate change that threatens to push species upslope as they struggle to find tolerable temperatures.
"Species are adapted to certain  conditions. As temperatures warm in mountains, scientists have documented species moving to higher elevations to maintain the same temperatures," said Paul Elsen, a WCS Climate Adaptation Scientist and lead author of the study. "This was always seen as a problem, because species would have less land area and less habitat to occupy at high elevations. But what we found is that as species move upslope, they tend to move away from areas that are already under intense human pressure and into areas with reduced human pressure. As a result, they can occupy more intact land area, even if the total amount of land area declines."
The authors combined several global databases to make their assessments: high-resolution digital elevation models gave a picture about how much surface area is available at different elevations. The Human Footprint Index provided information on pressure from human activities. Global  projected how temperatures are likely to change by the late 21st century.
The authors then used  to place hundreds of thousands of hypothetical 'species' across all  at different elevations and then predicted how they would shift their ranges based on climate projections. For each simulation, they compared the amount of area the species had to begin with to the amount they would have after the range shift under climate change.
Said Elsen: "We were surprised to find that many species had more intact land area available after the range shift compared to when they started."
The results suggest that many species in mountain ranges may have more intact land area available in the future if they track warming temperatures to higher slopes, though there were exceptions.
"Our results offer a glimmer of hope for montane species under ," Elsen said. "Montane species are still facing tremendous human pressure, especially at low elevations, but we have the opportunity now to protect intact habitats at  to give these  the best possible chance going forward."

More information: Paul R. Elsen et al, Topography and human pressure in mountain ranges alter expected species responses to climate change, Nature Communications (2020). DOI: 10.1038/s41467-020-15881-x
Journal information: Nature Communic