A team of researchers determined the mass extinction event that wiped out 95% of marine life and 70% of terrestrial life occurred approximately 252.28 million years ago, lasting less than 200,000 years.
Researchers used satellite imagery to assess the conservation status of endangered species in the Comoro archipelago, finding that only 9% of the island area is still covered by natural forest. This approach allows for precise estimation of remaining habitat extent and prioritization of future protected areas.
Research finds areas with highest amphibian species richness are most vulnerable to threats. The study suggests multiple drivers of extinction may accelerate population declines over the next decades.
A research team led by Virginia Tech's Lisa Belden is studying the role of microbial communities on the skin of frogs in defending against a devastating fungal disease. The goal is to develop probiotics that can help amphibians resist the disease and potentially even release endangered species back into nature.
Researchers successfully established cell cultures from frozen biopsy specimens of the critically endangered Mississippi gopher frog, marking a breakthrough in banking viable amphibian cells. The technique expands conservation efforts to combat diseases and advance reproductive studies.
Researchers at Caltech found that leeches rely on two distinct methods to detect prey: hairs detecting water disturbances and simple eyes picking up passing shadows. In adulthood, the preference shifts to using water disturbances alone.
Research finds West Nile virus transmission is highest in urbanized and agricultural habitats, with robins and specific mosquito species playing a crucial role. The virus has had an impact on human health, particularly due to its ability to target abundant bird species.
Research reveals that West Nile virus transmission is highest in urbanized and agricultural areas, with the American robin playing a key role as a 'super-spreader'. Mosquito species that feed on robins are more important in transmission than other birds.
A new study examines the impact of climate change on amphibian species, finding that rapid temperature swings can trap species at different points in their travels. The research suggests that many species will become endangered due to their inability to tolerate unfavorable climate conditions for extended periods.
Researchers at National Jewish Health found that T-cell receptors from mice continue to function with shark, frog, and trout receptor pieces substituted in. This interaction between the T cell and MHC molecules is crucial for immune defense and organ transplants.
Researchers found that ground beetle larvae use a unique method to attract and feed on amphibians, tricking them into thinking they are tasty prey. This phenomenon has significant implications for understanding the environmental impact of invasive species.
In a remarkable discovery, ground beetle larvae have evolved to lure and consume amphibians, reversing the typical predator-prey relationship. The larvae use unique movements and sit-and-wait strategies to draw in prey, before attaching themselves using double-hooked mouthparts.
Researchers at Oregon State University found that increased species richness decreases the prevalence and severity of infection caused by the deadly chytrid fungus in amphibians. This study provides evidence for the importance of biodiversity in protecting ecosystem function and reducing disease transmission.
A new study led by a University of Florida researcher verifies that the pet trade is the No. 1 cause of invasive amphibian and reptile introductions in Florida. The study documents 137 non-native species, with about 25% traced to one animal importer.
Scientists at Oregon State University have discovered a freshwater species of zooplankton, Daphnia magna, that can eat the B. dendrobatidis fungus devastating amphibian populations worldwide. The finding offers a promising biological control method to combat this deadly disease.
Researchers at Tel Aviv University have discovered that oral mucosa stem cells can be manipulated into fetal-like stem cells with high therapeutic potential for treating neurodegenerative, heart, and autoimmune diseases. The cells can be derived from a small biopsy of tissue and show minimal discomfort and healing time.
Researchers identified three periods of evolutionary innovation in gene regulation that increased in frequency during different periods in vertebrate evolution. These innovations affected genes involved in embryonic development, cell-to-cell communication, and signaling pathways.
A new survey of the deadly fungus chytridiomycosis in Asia has found very low levels of infection among amphibians, with only 2.35% prevalence across 15 countries. However, researchers warn that this could be a sign of emerging disease or other factors preventing invasion.
At least 351 species thought to have disappeared over the past 122 years have been rediscovered, but most remain highly threatened and on the brink of extinction due to habitat loss. Researchers stress the need for rapid conservation efforts to prevent further decline.
Dr. Ray Semlitsch has been awarded the 2011 Fitch Award for Excellence in Herpetology for his groundbreaking research on amphibian ecology and wetland conservation. His studies have shown that tolerance to contaminants varies among species, and he established the importance of aquatic environments for semi-aquatic amphibians.
A recent study suggests that mitigating chytridiomycosis through different infection control methods could largely prevent local extinctions and outbreaks of the disease. Researchers have identified successful pilot studies in Spain, including a heat therapy treatment using itraconazole, which has increased amphibian survival rates.
Researchers at Hebrew University have successfully identified and isolated 'organizer' cells in human embryos, which are responsible for determining the shape of the embryo during development. This breakthrough could lead to better understanding of embryonic development and potential applications in treating spinal damage.
Researchers found smaller osmolyte molecules are more effective at protecting protein structures than larger ones, which could lead to better storage techniques for human reproductive tissue used in IVF and other materials.
Researchers from the University of Zurich propose using bacteria and fungicides to fight the chytrid fungus, a major killer of amphibians worldwide. The study suggests two promising methods: using skin-borne bacteria to block the fungus or treating infected frogs with fungicides.
A UBC study found that over 75% of tree holes used by birds and mammals worldwide are created by damage and decay, emphasizing the importance of preserving older, larger trees. This contrasts with North American forests where woodpeckers dominate hole creation.
A study from Romania highlights the importance of traditional agriculture in protecting amphibians, finding that roads have a direct and indirect negative impact on their populations. Preserving traditional agricultural practices could be key to protecting these species in Central and Eastern Europe.
A Canadian study found that flexibility in mating rituals is crucial for reproductive success when males outnumber females. Researchers analyzed hundreds of investigations on mating trends across various species, finding significant flexibility in mating behavior and customs.
Researchers found that hydrogen peroxide released by damaged skin cells coordinates regeneration of sensory fibers, promoting wound healing and restoring touch sensation. The study demonstrates the healing power of hydrogen peroxide in zebrafish larvae.
Researchers from Tel-Aviv University discovered that ground beetles of the genus Epomis prey on live amphibians at night, contrary to their daytime sheltering behavior. The study found that two species of Epomis beetles attack different amphibian species, with only one species preying on a particular species.
New research in the FASEB Journal suggests that flawed antibody production could compromise resistance to infections during long-term missions. Scientists found that antibodies produced in space are less effective than those produced on Earth, posing a serious risk for astronauts.
Research published in BioMed Central's EvoDevo journal reveals that sloths and manatees have evolved unusual neck structures without apparent problems. The study suggests that slow lifestyles and low metabolic rates allowed these animals to alter their neck length without side effects, unlike other mammals.
A study using DNA from museum specimens reveals a clear pattern of amphibian decline linked to the deadly fungus Batrachochytrium dendrobatidis. The researchers found that the fungus first appeared in southern Mexico in the early 1970s, spreading southward to Central America and causing mass extirpation of neotropical amphibians.
A team of researchers used museum specimens to document a wave of <i> Batrachochytrium dendrobatidis </i> infection spreading from southern Mexico to western Guatemala and Costa Rica. The study highlights the devastating impact of this epidemic on amphibian populations, with over 40% in decline globally.
Researchers conclude that amphibian population declines are complex and multifaceted, driven by various natural forces and human activities such as habitat destruction, climate change, and disease. This understanding highlights the need for a comprehensive approach to address the crisis and avoid exacerbating the problem.
Researchers at University of Pennsylvania have discovered a new understanding of how the heart forms in frog embryos. They found that the blood separation comes from an entirely different part of the embryo, known as the 'second heart field'. This finding has implications for human health, particularly for patients with DiGeorge Syndrome.
The study found that TRPV3 channels in western clawed frogs have opposite temperature sensitivities compared to mammals, indicating dynamic adaptation to thermal environments. The researchers identified a gene and examined its function, revealing structural differences between frog and mammal channels.
Scientists and volunteers are working together to track the spread of a deadly amphibian fungus across the UK. The survey aims to identify the most at-risk species and develop strategies for conservation.
Scientists have discovered algae living inside the cells of developing spotted salamanders, marking the first known example of a eukaryotic algae endosymbiont in vertebrates. This finding highlights the complexity of animal-algae interactions and raises questions about the evolutionary origins of mitochondria and chloroplasts.
Researchers at UT Southwestern Medical Center discovered that newborn hearts can heal themselves completely. Within three weeks of removing a portion of the heart, it was able to grow back the lost tissue and function like a normal heart. This breakthrough offers new possibilities for treating heart disease.
Researchers found layers of coal ash in rocks from the extinction boundary that provide direct proof of massive volcanic eruptions and burning coal. This discovery supports models for significant greenhouse gas generation during the late Permian extinction.
Researchers found that 31 non-native freshwater species have established themselves in Galicia, including fish, amphibians, and plants. The study highlights the growing threat of invasive species to biodiversity in the region.
Research by Jennifer Schmidt and Lennart Olsson reveals that the gene FOXN3 influences the development of cranial cartilages and muscles in frogs, contributing to their evolutionary success. The study found that tadpoles without intact FOXN3 genes develop more slowly and experience deformations and loss of functions.
A new study will examine the impacts of climate change on biodiversity in the tropical Andes, focusing on four countries: Bolivia, Colombia, Ecuador, and Peru. The research aims to provide a standard methodology for estimating local climate change risks and inform decision-making, adaptation measures, and conservation planning.
A species-rescue program for Haiti's threatened frogs and other species is being established, with captive-breeding and gene-preservation efforts. The goal is to preserve species in case they become extinct due to habitat loss, with a focus on releasing offspring in Haiti when the forest habitat improves.
Researchers at North Carolina State University have discovered that female boa constrictors can reproduce asexually, producing all-female babies with rare genetic traits. The study found that these WW-chromosome females retained their mother's color mutation and lacked any male influence.
A study by Lisette Cantú-Salazar and Kevin J. Gaston found that large protected areas are crucial for preserving natural species assemblages, while also being vulnerable to inadequate management and human activities such as logging and mining. The researchers suggest that these areas should be prioritized for conservation efforts
Researchers have identified a new agouti family gene that regulates pigmentation and body weight in fish. The protein enables fish to dramatically change color to match their environment, a phenomenon also observed in mammals such as the arctic hare.
A major new study on the impact of conservation efforts reveals that many vertebrate species are threatened, but seagrasses, which provide habitat for these animals, are experiencing significant loss. Researchers say pollution and coastal development are main drivers of biodiversity loss.
A study published in Science reports that one-fifth of vertebrate species are threatened, with declines accelerating over the past few decades. Conservation measures have mitigated this trend, with certain approaches proving more effective than others, such as controlling invasive species.
A new assessment reveals that 20% of the world's vertebrates are currently threatened with extinction, with 52 species moving closer to extinction each year. The study highlights the alarming rate of decline among vertebrate species globally.
The study confirms an extinction crisis with one-fifth of species threatened, but highlights the positive impact of global conservation efforts. Conservation actions have prevented a decline in biodiversity by nearly 20%, with 64 species improving in status and three species being re-introduced back to nature.
A study by Dr. David Lohman suggests the Philippines could have more unique bird species due to its high biodiversity and geographic isolation. This could have significant implications for conservation efforts in the country.
Common frog populations across the UK are experiencing dramatic population crashes due to Ranavirus infection, with an average 81% decline in adult frogs over a 12-year period. The research also suggests that some frogs may have immunity to the disease, offering hope for their long-term future.
Computational biologists at the University of Pennsylvania found that species diversification rates have typically decayed over time, suggesting a limit to species diversity. The study used phylogenies from various groups and found relatively little extinction in the evolutionary trees, contrasting with the fossil record.
A new global analysis reveals nearly 80% of the world's human population lives in areas where river waters are highly threatened, posing a major threat to human water security and biodiversity. Rivers worldwide face similar stresses from agricultural intensification, industrial development, and other factors.
A new study by North Carolina State University researchers suggests that the largest amphibian monitoring program in the US may have inaccuracies in its data, leading to overestimates of frog populations. The issue lies in observer error, as volunteers report hearing species they don't actually hear, which can skew population estimates.
Researchers have discovered that axolotls possess pluripotent cells in their embryos, similar to those found in mammals, offering a unique opportunity to study the properties of embryonic stem cells. This breakthrough supports the development of regenerative medicine and provides insights into the evolution of stem cell properties.
Research shows that cane toads can adapt well to rising temperatures, with their oxygen transport system becoming more efficient as heat rises. The findings contradict previous studies suggesting a decrease in efficiency at high temperatures, and may have implications for other anurans.
Researchers at the University of California, San Diego School of Medicine found that removing three key inhibitory molecules from myelin did not significantly improve axon regeneration in damaged spinal cords. The study suggests that successful regeneration will require a combination of many approaches and techniques.
Despite decades of research suggesting UV radiation was a major contributor to amphibian declines, new findings reveal that natural water conditions and female behavior are more significant factors in protecting embryos from harm. Amphibians exhibit adaptations such as laying eggs in shaded areas when water clarity puts them at risk.