As a doctoral student completing my field research in Gorongosa, I participated as the mammal expert on the annual biodiversity surveys. After finishing my Ph.D. in 2018, I shifted to a career in photojournalism. I went on my last two biodiversity surveys in 2018 and 2019 — first in Chimanimani’s buffer zone, then in the heart of Chimanimani — as the photographer.

These surveys are like biological treasure hunts. Scientists, each with a different specialty, are let loose in the landscape to unearth as many species as they can.

The mammalogists set camera traps for large mammals like antelope, live traps for small mammals like rodents, and mist nets for bats. The ornithologists arm themselves primarily with binoculars, their ears and an astonishing memory for bird songs. By day, the entomologists sweep their butterfly nets in the grassland and, by night, often stand at a light surrounded by clouds of insects, picking them out of their hair and waiting for something interesting to land.

The herpetologists, or reptile and amphibian specialists, shoot rubber bands to temporarily stun lizards, dive into knee-high water after agile frogs, and generally avoid being bitten by venomous snakes while far away from medical care.

By contrast, the botanists have a tranquil task: there’s something relaxing and almost elegant about strolling across the mountainside, inspecting beautiful flowers and pressing some in paper for posterity.

Biodiversity surveys are not for the faint of heart, and they cast more than a little doubt on the idea that scientists are all boring nerds in lab coats.

Through the years, I myself have been bitten by a tarantula, several bats, a mouse, countless insects and even a (nonvenomous) snake. Once, back in New Jersey after a survey, a doctor flushed my ears when I complained of muffled hearing. Out poured dozens of tiny, wax-entombed insects in various shapes and sizes. (The experts often wear plugs in their ears while standing at the insect light for this exact reason.)

There’s something about this change of pace that I’ve always found immensely appealing. In the cool Chimanimani mornings, the scientists who didn’t have to be up before dawn chasing their species would lounge, sipping instant coffee from plastic mugs and watching the clouds cast shadows onto the giant rock dome.

Featuring a diverse set of rare and endemic avian species, Chimanimani is a bird-watcher’s paradise. At Rio Nyahedzi, a camp some 4,000 feet above sea level, the survey’s ornithologists found the bokmakierie, a bird that was last seen in Mozambique in the 1970s. (Nyahedzi is close to Mount Binga, which lies directly on the border between Mozambique and Zimbabwe.)

As the park gets more attention, it will also attract hikers and rock climbers. Some of the park’s most beautiful waterfalls are 15 miles from the nearest road, and you can hike for days without seeing another human being. The park vibrates with solitude, adventure and discovery.

At the end of the two surveys, scientists in Chimanimani had found more than 1,400 species: 475 plants, 43 mammals, 260 birds, 67 amphibians and reptiles, and at least 582 species of insects. Some are new to science.

“It was amazingly productive as a rapid survey,” said Rob Harris, of Fauna & Flora International’s Mozambique program, emphasizing that the discoveries took place in a relatively short period of time.

The incredible diversity uncovered by the surveys is only a part of what’s known. As a whole, the Chimanimani Mountains are known to contain almost 1,000 plant species alone. Seventy-six plant and animal species are endemic to the Chimanimani Mountains, meaning they exist nowhere else on Earth.

Like all wild places, Chimanimani’s future is anything but certain. Endemic species are particularly threatened by climate change; because of their restricted range, they don’t have anywhere else to go as conditions become unsuitable. And human population growth will continue to jeopardize the fringes of the park. “The deforestation outside the park and in the buffer zone was alarming,” said Zak Pohlen, an ornithologist.

But as I reflect on these surveys and my time in Mozambique, I can’t help but feel full of hope. I am inspired every day by the passion of young Mozambican conservationists to safeguard their country’s disappearing wilderness. And most of all, I’m inspired by their optimism.

One of the goals of these surveys is to train young Mozambicans to take over leadership roles in conservation. Ana Gledis da Conceição, a Mozambican mammalogist, for example, spent several years assisting me in surveying mammals; by 2019, she was co-leading the mammal team with Mnqobi Mamba, a master’s student at the University of Eswatini.

Ms. da Conceição says she’s exactly where she’s supposed to be — a young scientist who fights for the conservation of biodiversity. “I want to invite young people like me to embrace this cause for the good of all of us,” she said.

“In spite of everything,” she added, “Mozambique has much to contribute to the future of conservation.”

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Virus Variants Can Infect Mice, Scientists Report

Bats, humans, monkeys, minks, big cats and big apes — the coronavirus can make a home in many different animals. But now the list of potential hosts has expanded to include mice, according to an unnerving new study.

Infected rodents pose no immediate risk to people, even in cities like London and New York, where they are ubiquitous and unwelcome occupants of subway stations, basements and backyards.

Still, the finding is worrying. Along with previous work, it suggests that new mutations are giving the virus the ability to replicate in a wider array of animal species, experts said.

“The virus is changing, and unfortunately it’s changing pretty fast,” said Timothy Sheahan, a virologist at the University of North Carolina at Chapel Hill, who was not involved in the new study.

only animals known to be able to catch the coronavirus from humans and pass it back. In early November, Denmark culled 17 million farmed mink to prevent the virus from evolving into dangerous new variants in the animals.

More recently, researchers found that B.1.1.7 infections in domesticated cats and dogs can cause the pets to develop heart problems similar to those seen in people with Covid-19.

To establish a successful infection, the coronavirus must bind to a protein on the surface of animal cells, gain entry into the cells, and exploit their machinery to make copies of itself. The virus must also evade the immune system’s early attempts at thwarting the infection.

Given all those requirements, it is “quite extraordinary” that the coronavirus can infect so many species, said Vincent Munster, a virologist at the National Institute of Allergy and Infectious Diseases. “Typically, viruses have a more curtailed host range.”

Mice are a known reservoir for hantavirus, which causes a rare and deadly disease in people. Even though the coronavirus variants don’t seem to be able to jump from mice to people, there is potential for them to spread among rodents, evolve into new variants, and then infect people again, Dr. Munster said.

black-footed ferrets. “This virus seems to be able to surprise us more than anything else, or any other previous virus,” Dr. Munster said. “We have to err on the side of caution.”

Dr. Sheahan said he was more concerned about transmission to people from farm animals and pets than from mice.

“You’re not catching wild mice in your house and snuggling — getting all up in their face and sharing the same airspace, like maybe with your cat or your dog,” he said. “I’d be more worried about wild or domestic animals with which we have a more intimate relationship.”

But he and other experts said the results emphasized the need to closely monitor the rapid changes in the virus.

“It’s like a moving target — it’s crazy,” he added. “There’s nothing we can do about it, other than try and get people vaccinated really fast.”

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