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Hidden mangrove forest in the Yucatan peninsula reveals ancient sea levels

January 4, 2022 by Farhana Leave a Comment

Deep in the heart of the Yucatan Peninsula, an ancient mangrove ecosystem flourishes more than 200 kilometers (124 miles) from the nearest ocean. This is unusual because mangroves – salt-tolerant trees, shrubs, and palms – are typically found along tropical and subtropical coastlines.

A new study led by researchers across the University of California system in the United States and researchers in Mexico focuses on this luxuriant red mangrove forest.

This “lost world” is located far from the coast along the banks of the San Pedro Martir River, which runs from the El Petén rainforests in Guatemala to the Balancán region in Tabasco, Mexico.

Because the red mangrove (Rhizophora mangle) and other species present in this unique ecosystem are only known to grow in salt water or somewhat salty water, the binational team set out to discover how the coastal mangroves were established so deep inland in fresh water completely isolated from the ocean. Their findings were published October 4 in the Proceedings of the National Academy of Sciences. [Read more…] about Hidden mangrove forest in the Yucatan peninsula reveals ancient sea levels

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    How climate change and fires are shaping the forests of the futureForest fires are already a global threat. "But considering how climate change is progressing, we are probably only at the beginning of a future that will see more and bigger forest fires," explains Rupert Seidl, Professor of Ecosystem Dynamics and Forest Management in Mountain Landscapes at TUM. In many places,…
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    How climate change and fires are shaping the forests of the futureForest fires are already a global threat. "But considering how climate change is progressing, we are probably only at the beginning of a future that will see more and bigger forest fires," explains Rupert Seidl, Professor of Ecosystem Dynamics and Forest Management in Mountain Landscapes at TUM. In many places,…
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  • Research shows flocking birds, schooling fish, other collective movements can stabilize ecosystems
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    Research shows flocking birds, schooling fish, other collective movements can stabilize ecosystemsIn addition to being visually stunning, schools of herring, herds of wildebeest and countless other groups of organisms that act in concert can help complex ecosystems maintain their diversity and stability, new research by Oregon State University shows. Published today in Nature Ecology and Evolution, the study demonstrates that when…
    Tags: species, ecosystem, features, nature
  • New fossil discovery from Israel points to complicated evolutionary process
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    New fossil discovery from Israel points to complicated evolutionary processAnalysis of recently discovered fossils found in Israel suggest that interactions between different human species were more complex than previously believed, according to a team of researchers including Binghamton University anthropology professor Rolf Quam. The research team, led by Israel Hershkovitz from Tel Aviv University, published their findings in Science, describing…
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  • Melting ice sheets over the past 300 years raised sea levels 18 metres
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    Melting ice sheets over the past 300 years raised sea levels 18 metresIt is well known that climate-induced sea level rise is a major threat. New research has found that previous ice loss events could have caused sea-level rise at rates of around 3.6 metres per century, offering vital clues as to what lies ahead should climate change continue unabated. A team…
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Filed Under: Features, Nature Tagged With: climate, coastal, ecosystem, forest, mangrove, mexico, pedro, region, river, san, species

How birds, mammals and children learn sounds

September 7, 2021 by Editor

Alex the grey parrot, who famously asked “what color?” when looking in the mirror, had astonishing abilities to mimic human speech.

Interest in the ability of animals to learn sounds dates back thousands of years. Research on this ability, known as vocal learning, can shed light on the evolution of communication and human speech and language.

According to MPI’s Sonja Vernes, “comparative work investigating this trait across different types of animals is particularly important”. [Read more…] about How birds, mammals and children learn sounds

Filed Under: Nature, News Tagged With: animals, bats, birds, calls, dolphins, hear, human, humans, issue, learn, learning, sonja, sounds, special, speech, vernes, vocal

Study shows tiger sharks have social preferences for one another

September 6, 2021 by Editor

Scientists at the University of Miami Rosenstiel School of Marine and Atmospheric Science (UM) and the Institute of Zoology at the Zoological Society London (ZSL) found that tiger sharks, often considered a solitary nomadic species, are social creatures, having preferences for one another.

A first of its kind, the study also evaluated if exposure of the tiger shark to baited dive tourism impacted their social behavior.

The study was conducted at a site named Tiger Beach, located off the north-west side of Little Bahama bank in the Bahamas. The area is known for hosting shark diving encounters, where the sharks are attracted with chum and often fed in front of dive tourists. [Read more…] about Study shows tiger sharks have social preferences for one another

Filed Under: Nature, News Tagged With: behavior, dive, marine, predators, science, shark, sharks, social, study, tiger, university

Research shows flocking birds, schooling fish, other collective movements can stabilize ecosystems

August 19, 2021 by Editor

In addition to being visually stunning, schools of herring, herds of wildebeest and countless other groups of organisms that act in concert can help complex ecosystems maintain their diversity and stability, new research by Oregon State University shows.

Published today in Nature Ecology and Evolution, the study demonstrates that when individuals band together to consume resources as a collective group, the surrounding ecosystem is prone to be more resilient and able to support a wider range of species.

The findings could be an important step toward understanding how living systems stay on an even keel; collective behavior is ubiquitous on the planet, playing a prominent role in everything from bacterial biofilms to human cities. [Read more…] about Research shows flocking birds, schooling fish, other collective movements can stabilize ecosystems

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  • Experiences of loneliness may differ by age
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    Experiences of loneliness may differ by ageLoneliness in adult life is experienced differently depending on age, according to a study published in the open access journal BMC Public Health.   The research concludes that there can be no ‘one-size-fits-all’ approach to reducing loneliness, as factors associated with it, such as contact with friends and family, perceived…
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  • The Earth is flat. Everything else is just fake news. Or is it?
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    The Earth is flat. Everything else is just fake news. Or is it?‘Is Western culture balancing on a tightrope between science and humanities?’ asks Carlos Elias, author of new book Science on the Ropes, which explains why science has been dethroned from its prestigious position in Western culture and replaced by pseudoscientific conjecture and fake news Pseudoscience is on the rise and…
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  • Estonian company Auve Tech launches ‘world’s first’ autonomous hydrogen vehicle
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    Estonian company Auve Tech launches ‘world’s first’ autonomous hydrogen vehicleWhat has been described as “the world’s first autonomous hydrogen vehicle” has now been officially launched. Created by the Estonian enterprise Auve Tech in cooperation with University of Tartu researchers, the vehicle was presented to the public for the first time in Tartu, a city in eastern Estonia. The first…
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  • Hidden mangrove forest in the Yucatan peninsula reveals ancient sea levels
    35
    Hidden mangrove forest in the Yucatan peninsula reveals ancient sea levelsDeep in the heart of the Yucatan Peninsula, an ancient mangrove ecosystem flourishes more than 200 kilometers (124 miles) from the nearest ocean. This is unusual because mangroves – salt-tolerant trees, shrubs, and palms – are typically found along tropical and subtropical coastlines. A new study led by researchers across…
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Filed Under: Features, Nature

New study suggests falcons have natural ‘eye makeup’ to improve hunting ability

August 19, 2021 by Editor

Dark “eyeliner” feathers of peregrine falcons act as sun shields to improve the birds’ hunting ability, a new scientific study suggests.

Scientists have long speculated that falcons’ eye markings improve their ability to target fast-moving prey, like pigeons and doves, in bright sunlight. Now research suggests these markings have evolved according to the climate; the sunnier the bird’s habitat, the larger and darker are the tell-tale dark ‘sun-shade’ feathers.

The distinctive dark stripes directly beneath the peregrine falcon’s eyes, called the malar stripe or ‘moustache’, likely reduce sunlight glare and confer a competitive advantage during high-speed chases. It’s an evolutionary trait mimicked by some top athletes who smear dark makeup below their eyes to help them spot fast-moving balls in competitive sports. [Read more…] about New study suggests falcons have natural ‘eye makeup’ to improve hunting ability

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  • New study suggests falcons have natural 'eye makeup' to improve hunting ability
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    New study suggests falcons have natural 'eye makeup' to improve hunting abilityDark “eyeliner” feathers of peregrine falcons act as sun shields to improve the birds' hunting ability, a new scientific study suggests. Scientists have long speculated that falcons' eye markings improve their ability to target fast-moving prey, like pigeons and doves, in bright sunlight. Now research suggests these markings have evolved…
    Tags: peregrine, malar, study, falcons, dark, stripe, sunlight, bird, solar, hypothesis

Filed Under: Features, Nature Tagged With: ability, amar, bird, competitive, dark, eyes, falcon, falcons, fast-moving, glare, hunting, hypothesis, improve, makeup, malar, mimicked, peregrine, photos, reduce, solar, species, stripe, stripes, study, suggests, sunlight, uct, vrettos

Farmers help create ‘Virtual safe space’ to save bumblebees

August 16, 2021 by Editor

Solutions to help pollinators can be tested using a “virtual safe space” tool created by scientists at the University of Exeter in collaboration with farmers and land managers.

Bee-Steward is a decision-support tool which provides a computer simulation of bumblebee colony survival in a given landscape.

The tool lets researchers, farmers, policymakers and other interested parties test different land management techniques to find out which ones and where could be most beneficial for bees. [Read more…] about Farmers help create ‘Virtual safe space’ to save bumblebees

Filed Under: Nature, News Tagged With: bee-steward, bumblebee, conservation, cornwall, create, enabling, exeter, farmers, improve, land, landscape, management, managers, model, safe, scientists, space, survival, test, tool, trust, virtual

How climate change and fires are shaping the forests of the future

July 26, 2021 by Editor

Forest fires are already a global threat. “But considering how climate change is progressing, we are probably only at the beginning of a future that will see more and bigger forest fires,” explains Rupert Seidl, Professor of Ecosystem Dynamics and Forest Management in Mountain Landscapes at TUM.

In many places, fire is part of the natural environment, and many tree species have become naturally adapted to recurrent fires. These adaptations range from particularly thick bark, which protects the sensitive cambium in the trunk from the fire, to the cones of certain types of pine, which open only due to the heat of fire, allowing a quick regeneration and recovery of affected woodland .

AI is accelerating ecosystem models [Read more…] about How climate change and fires are shaping the forests of the future

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  • African great apes to suffer massive range loss in next 30 years
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Filed Under: Nature, News Tagged With: climate, ecosystem, fires, forest, park, trees, yellowstone

Ice-free Arctic summers could happen on early side of predictions

July 2, 2021 by Editor

The Arctic Ocean could become ice-free in the summer in the next 20 years due to a natural, long-term warming phase in the tropical Pacific that adds to human-caused warming, according to a new study.

Computer models predict climate change will cause the Arctic to be nearly free of sea ice during the summer by the middle of this century, unless human greenhouse gas emissions are greatly reduced.

But a closer examination of long-term temperature cycles in the tropical Pacific points towards an ice-free Arctic in September, the month with the least sea ice, on the earlier side of forecasts, according to a new study in the AGU journal Geophysical Research Letters. [Read more…] about Ice-free Arctic summers could happen on early side of predictions

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Filed Under: Nature, News Tagged With: arctic, climate, ice-free, ocean, sea, summer, temperature, warming

Butterflies cross the Sahara in longest-known insect migration

June 28, 2021 by Editor

A species of butterfly found in Sub-Saharan Africa is able to migrate thousands of miles to Europe, crossing the Saharan Desert, in years when weather conditions are favourable, scientists have found.

The striking Painted Lady (Vanessa cardui) butterfly has been shown for the first time to be capable of making the 12,000-14,000km round trip – the longest insect migration known so far – in greater numbers, when wetter conditions in the desert help the plants on which it lays eggs.

The international research team’s findings increase understanding of how insects, including pollinators, pests and the diseases they carry could spread between continents in future as climate change alters seasonal conditions. [Read more…] about Butterflies cross the Sahara in longest-known insect migration

Filed Under: Features, Nature Tagged With: butterflies, change, data, desert, favourable, insect, lady, migrate, migration, numbers, painted, pests, regions, sahara, species, spring, winter

Mystery of green icebergs say soon be solved

June 15, 2021 by Editor

Glaciologists report in a new study that they suspect iron oxides in rock dust from Antarctica’s mainland are giving some icebergs an unusual color.

This news article was issued by the American Geophysical Union (AGU) as a press release on 4 March 2019.

Researchers have proposed a new idea that may explain why some Antarctic icebergs are tinged emerald green rather than the normal blue, potentially solving a decades-long scientific mystery. [Read more…] about Mystery of green icebergs say soon be solved

Filed Under: Nature, News Tagged With: green, ice, icebergs, iron, marine

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