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Category: Ecology

Songbirds being killed by topical pesticides used for pet fleas and ticks

Songbirds being killed by topical pesticides used for pet fleas and ticks

The Guardian reports: Songbird chicks are being killed by high levels of pesticides in the pet fur used by their parents to line their nests, a study has found. Researchers surveying nests for the harmful chemical found in pet flea treatments found that it was present in every single nest. The scientists from the University of Sussex are now calling for the government to urgently reassess the environmental risk of pesticides used in flea and tick treatments and consider restricting…

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The key to a healthy gut microbiome is a healthy diet

The key to a healthy gut microbiome is a healthy diet

Università di Trento: A varied diet rich in vegetables is known to be healthy for one’s well-being. Excessive consumption of meat, especially red meat, can lead to chronic and cardiovascular diseases. That is also because what we eat shapes the gut microbiome. At the same time, excluding certain foods, such as dairy or animal products, is not necessarily a general solution to achieve microbial balance. But can we find out which food products determine differences in the gut microbiome? Starting…

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The ocean is teeming with networks of interconnected bacteria

The ocean is teeming with networks of interconnected bacteria

Veronique Greenwood writes: Prochlorococcus bacteria are so small that you’d have to line up around a thousand of them to match the thickness of a human thumbnail. The ocean seethes with them: The microbes are likely the most abundant photosynthetic organism on the planet, and they create a significant portion — 10% to 20% — of the atmosphere’s oxygen. That means that life on Earth depends on the roughly 3 octillion (or 3 × 1027) tiny individual cells toiling away….

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Fish have a brain microbiome. Could humans have one too?

Fish have a brain microbiome. Could humans have one too?

Yasemin Saplakoglu writes: Bacteria are in, around and all over us. They thrive in almost every corner of the planet, from deep-sea hydrothermal vents to high up in the clouds, to the crevices of your ears, mouth, nose and gut. But scientists have long assumed that bacteria can’t survive in the human brain. The powerful blood-brain barrier, the thinking goes, keeps the organ mostly free from outside invaders. But are we sure that a healthy human brain doesn’t have a…

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As climate change melts permafrost, microbes that we have never been exposed to will emerge

As climate change melts permafrost, microbes that we have never been exposed to will emerge

Valerie Brown writes: The popular image of the Arctic is as a “frozen North,” which it was for all of human history until a couple of centuries ago. In that view, intrepid explorers and scientists clatter over tundra and ice roads in dogsleds and decrepit trucks, risking everything to bring back important samples and wild tales of howling winds. But this vision is growing passé. The Arctic is warming four times as fast as the global average. While there are…

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Over a third of trees globally face threat of extinction

Over a third of trees globally face threat of extinction

BBC News reports: Scientists assessing dangers posed to the world’s trees have revealed that more than a third of species are facing extinction in the wild. The number of threatened trees now outweighs all threatened birds, mammals, reptiles and amphibians put together, according to the latest update to the official extinction red list. The news was released in Cali, Colombia, where world leaders are meeting at the UN biodiversity summit, COP 16, to assess progress on a landmark rescue plan…

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Polar bears are getting horrific injuries because of climate change, researchers say

Polar bears are getting horrific injuries because of climate change, researchers say

Live Science reports: Polar bears are developing horrific wounds on their paws due to changing ice conditions in the Arctic, a new study reports. In the most severe cases, researchers describe two bears with crippling, dinner plate-size balls of ice stuck to their feet. Beneath the ice balls, the bears’ paw pads were covered in deep, bleeding cuts. “I’d never seen that before,” study lead author Kristin Laidre, a marine ecologist and associate professor at the University of Washington, said…

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Humanity is on the verge of ‘shattering Earth’s natural limits’, say experts in biodiversity warning

Humanity is on the verge of ‘shattering Earth’s natural limits’, say experts in biodiversity warning

The Guardian reports: Humanity is “on the precipice” of shattering Earth’s limits, and will suffer huge costs if we fail to act on biodiversity loss, experts warn. This week, world leaders meet in Cali, Colombia, for the Cop16 UN biodiversity conference to discuss action on the global crisis. As they prepare for negotiations, scientists and experts around the world have warned that the stakes are high, and there is “no time to waste”. “We are already locked in for significant…

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Researchers parse the future of plankton in an ever-warmer world

Researchers parse the future of plankton in an ever-warmer world

Nicola Jones writes: Across the world’s oceans, an invisible army of tiny organisms has a supersized impact on the planet. Plankton are at the base of the ocean food chain, feeding fish that feed billions of people. They are responsible for half of the world’s oxygen supply and half of our planet’s annual carbon sink. Miniscule but powerful, their presence can help or hinder ecosystems — by soaking up greenhouse gas, for example, or by spewing toxins. Where plankton live,…

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The hidden world of electrostatic ecology

The hidden world of electrostatic ecology

Max G. Levy writes: Imagine, for a moment, that you’re a honeybee. In many ways, your world is small. Your four delicate wings, each less than a centimeter long, transport your half-gram body through looming landscapes full of giant animals and plants. In other ways, your world is expansive, even grand. Your five eyes see colors and patterns that humans can’t, and your multisensory antennae detect odors from distant flowers. For years, biologists have wondered whether bees have another grand…

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The asteroid-in-spring hypothesis

The asteroid-in-spring hypothesis

Kerry Howley writes: It remains a matter of dispute when and where and with what antecedent Melanie During came up with the idea for determining the season the asteroid killed the dinosaurs. But the idea was this: Sturgeon bones grow like tree rings, and the bone cells grow thickest in summer, when food is most plentiful. A slice of bone, then, should reveal a succession of seasons. Months of plenty would be thicker, as the fish grew fat on plankton….

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What ‘plant philosophy’ says about plant agency and intelligence

What ‘plant philosophy’ says about plant agency and intelligence

Stella Sandford writes: It was once common, in Western societies at least, to think of plants as the passive, inert background to animal life, or as mere animal fodder. Plants could be fascinating in their own right, of course, but they lacked much of what made animals and humans interesting, such as agency, intelligence, cognition, intention, consciousness, decision-making, self-identification, sociality and altruism. However, groundbreaking developments in the plant sciences since the end of the previous century have blown that view…

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How decline of Indian vultures led to 500,000 human deaths

How decline of Indian vultures led to 500,000 human deaths

BBC News reports: Once upon a time, the vulture was an abundant and ubiquitous bird in India. The scavenging birds hovered over sprawling landfills, looking for cattle carcasses. Sometimes they would alarm pilots by getting sucked into jet engines during airport take-offs. But more than two decades ago, India’s vultures began dying because of a drug used to treat sick cows. By the mid-1990s, the 50 million-strong vulture population had plummeted to near zero because of diclofenac, a cheap non-steroidal…

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Inside Leonard Leo’s campaign to end protections for endangered species

Inside Leonard Leo’s campaign to end protections for endangered species

Rolling Stone reports: Leonard Leo, best known as the architect of the Supreme Court’s conservative supermajority, is fueling an assault on efforts to preserve the environment and the planet. His dark money network has also been funding campaigns to dismantle the Endangered Species Act (ESA) — 50 years after it was established to protect plant and animal species at risk of extinction. Since its passing, the ESA has been credited for saving 99 percent of its listed wildlife including bald…

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Protecting just 1.2% of Earth’s land could save most-threatened species, says study

Protecting just 1.2% of Earth’s land could save most-threatened species, says study

The Guardian reports: Protecting just 1.2% of the Earth’s surface for nature would be enough to prevent the extinction of the world’s most threatened species, according to a new study. Analysis published in the journal Frontiers in Science has found that the targeted expansion of protected areas on land would be enough to prevent the loss of thousands of the mammals, birds, amphibians and plants that are closest to disappearing. From Argentina to Papua New Guinea, the team of researchers…

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A third of North America’s birds have vanished

A third of North America’s birds have vanished

Anders Gyllenhaal and Beverly Gyllenhaal write: For weeks, Adam Smith had been crunching the raw data from more bird statistics than anyone had ever tried before—thirteen different bird counts and millions of radar sweeps. Suddenly he heard the musical chime that tells him his results are ready. He leaned across his desk, surrounded by enough high-powered computers to heat up his entire office, and stared at what could only be an impossible conclusion: Over the past fifty years, his calculations…

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