Articles tagged with Extinction
A new study has assessed the extinction risk of individual seagrass species worldwide, revealing that 10 out of 72 species are at elevated risk of extinction. The research highlights the critical role seagrasses play in maintaining marine ecosystems and human livelihoods.
A recent study by an international team of researchers found that the processes of extinction and speciation are linked in plants, with young species often appearing at high risk of extinction. This challenges the application of the same threat criteria across living organisms and regions.
A new study claims that species extinction rates have been overreported by as much as 160%, using widely used methods. However, the global extinction crisis is still very real, according to researchers. The study's findings suggest that habitat loss is not as dire as previously thought, but conservation efforts are still necessary.
Researchers describe a new species of land crab that documents the first crab extinction during the human era, likely caused by the arrival of humans to the Hawaiian Islands. The loss of the crab had a significant impact on the ecology of the islands.
A new study disputes the use of a single minimum viable population number as a yardstick for conservation policies. Populations show rapid declines due to human activities, but removing negative effects, even small populations could be viable in the long term.
A team of researchers studied the evolution of parareptiles, finding that they were not hit as hard by the end-Permian extinction as previously thought. The study used evolutionary relationships to infer missing diversity and revealed new patterns in the fossil record.
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.
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.
The study found that local pikas are losing their habitats, moving up mountain slopes at a rapid pace of 11-fold since the 20th century. This suggests that American pikas can act as early warning indicators for future species distribution shifts due to climate change.
Researchers studied three species of shootingstars to understand their response to global warming. They found that some species migrated while others adapted in place, with rare species exhibiting distinct genetic histories. This study provides valuable clues for predicting how plants will respond to climate change.
A meta-analysis found that invasive plant species cause large losses in biodiversity at small scales but have a negligible impact at broader scales. This contradicts the common view of invasive plants as major threats to native biodiversity. The study suggests that the effect of invasive plants on native species extinctions decreases w...
A new index called SAFE (Species Ability to Forestall Extinction) measures how close a species is to extinction. The index provides a formula for calculating the minimum viable population size, allowing conservationists to prioritize resources on species most likely to be brought back from the brink of extinction.
A meta-analysis of 400 published experiments reveals that species loss at the producer level reduces ecosystem productivity and sustainability. The study found that diverse communities are more productive and efficient than their average species, with some even outperforming the single best species in a monoculture. Loss of plant diver...
Researchers estimate that if currently threatened species go extinct, the sixth mass extinction could arrive within 3 to 22 centuries. However, they also believe it's not too late to save critically endangered mammals and other species through conservation efforts.
A study published in Nature warns that Earth is on the brink of a mass extinction like those that have occurred five times during the past 540 million years. The study finds cause for hope and alarm, with critically endangered mammals facing an even greater risk of extinction within three generations.
A new predictive method developed by marine scientists has found that a third of reef fishes studied across the Indian Ocean are potentially vulnerable to climate change. The 'extinction risk index' provides coral reef managers with insights to better protect and manage coral reefs, showing local and regional commitment improves prospe...
Scientists developed a mathematical model to describe interactions within ecological food webs, illustrating how human intervention can aid species conservation. The study found that over 70% of extinctions are preventable by balancing the system with available resources.
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.
Woolly mammoths living north of the Arctic Circle began weaning infants up to three years later than modern African elephants, potentially contributing to their eventual extinction. This adaptation to harsher environment and prolonged nursing may have made them more vulnerable to climate change and human hunting.
A new study predicts that the Mariana crow will go extinct in 75 years due to a low first-year survival rate of 40%. The species is critically endangered and faces threats from invasive species like feral cats and brown tree snakes.
A recent study, led by Hélène Morlon, has found that evolutionary diversity is more sensitive to extinctions or habitat loss than previously thought. The researchers built an evolutionary tree tracing plant species back to their common ancestor and applied mathematical approaches to consider the impact of geographic separation on phylo...
Research reveals a pattern of reptile extinctions on Greek islands, with habitat specialists and northern species most affected. The study suggests that preserving habitat corridors will enable plants and animals to migrate in response to climate change.
A study published in Nature found that species loss leads to increases in disease-causing organisms, increasing the risk of infectious diseases such as Lyme disease and hantavirus. The researchers argue that preserving natural habitats is crucial to preventing this effect.
Researchers at UWM have discovered a potential treatment for cocaine addiction that blocks memory retrieval associated with drug use. The study shows propranolol to be effective in preventing relapse by replacing cocaine-associated memories with neutral associations.
A Queensland University of Technology (QUT) statistician has found that villagers who live alongside orangutans are unaware of the laws protecting them, and many admit to killing the primates. The study suggests education campaigns tailored to specific areas and cultural groups can effectively target orangutan hunting.
A recent study found that invasive species and over-exploitation of water resources are the biggest threats to fish in the Mediterranean basin. The researchers used data on 232 fish species and their distribution range to show that fish communities are exposed to the greatest threat of extinction when these pressures are present.
A new study found that plants that can self-pollinate have higher extinction rates than those relying on external pollinators. This is because they often lack the genetic diversity needed to adapt to changing environments, making them more vulnerable to extinction.
A team of researchers led by Thomas Algeo from the University of Cincinnati analyzed chemical evidence from rocks formed during the Permian-Triassic extinction event, which wiped out 90% of all living species. The study suggests that massive volcanic eruptions in Siberia and global climate change contributed to the catastrophic event.
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 global study by the International Union for Conservation of Nature (IUCN) reveals that 33% of shark, skate, and ray species are threatened with extinction. Conservation actions have benefited a few vertebrate species worldwide, but insufficient efforts to slow the overall increase in threatened species.
A new analysis forecasts inevitable biodiversity decline, but offers hope that it can be slowed through climate change mitigation and better policies. Emerging policy choices have the potential to reduce biodiversity loss by up to 15% by 2030.
New research suggests that massive volcanic eruptions led to the extinction of Neanderthals, causing a dramatic climate shift that devastated ecosystems. The study, published in Current Anthropology, proposes that the eruption cleared the way for modern humans to thrive in Europe and Asia.
The study analyzed the impact of climate change on spotted hyena survival in Europe over 10,000 years ago. The researchers found that while climate change was a factor in the hyenas' disappearance, it was not the sole cause.
Researchers developed a statistical model to detect early warning signs of extinction in deteriorating environments, which can predict the approach to a tipping point. This study has implications for understanding drastic changes in complex systems, including the human brain and ecosystems.
A new study suggests that a massive reduction in green pastures and the spread of forests may have been the primary cause of the decline of mammals like the woolly mammoth. The research found that climate change and habitat changes made grazing difficult for large mammals, leading to their extinction.
A new infectious disease, white-nose syndrome, is killing millions of bats and predicted to cause regional extinction of the little brown myotis. The disease affects hibernating bats and disrupts their hibernation, causing them to wake early and lose critical fat reserves.
The CSIRO Australia team has found the remains of a massive 6 kg rat, which survived until around 1000-2000 years ago. The discovery highlights the importance of conserving biodiversity among rodents, such as rats, which play key roles in ecosystems.
A recent study reveals that a warming climate may cause African apes to lose up to 50% of their habitats due to increased time spent resting. Researchers found that climate change alone can lead to significant habitat loss, making it crucial to ensure safe havens for conservation efforts.
Research suggests that small and isolated reefs are more susceptible to local species extinctions due to variable fish populations. Larger, connected habitats see fewer fluctuations in population sizes, making them more resilient to changes.
A new study proposes that early hunters contributed to the demise of mammoths around 15,000 years ago, leading to a significant increase in birch trees and global warming. The researchers estimate that this event may have added up to 0.1 degrees Celsius to the planet's temperature over several centuries.
A laboratory study of microscopic organisms subjected to varying degrees of acoustic disturbance shows that competition can be a factor in regulating ecological communities regardless of the intensity or frequency of disturbance. The findings contradict the intermediate disturbance hypothesis, suggesting that there is a strong trade-of...
A team of researchers has discovered a protein that can mimic the effect of training in rats, inducing a memory of safety. The protein, BDNF, supports the growth and survival of neurons and was found to be effective in extinguishing fear memories in rats.
Scientists found a way to pharmacologically induce a memory of safety in the brain of rats by administering brain-derived neurotrophic factor (BDNF) into the prefrontal cortex. This procedure prevented rats from expressing fear to a tone that had been previously paired with a shock, suggesting new treatments for anxiety disorders.
Researchers found that global warming led to a 30% decline in biodiversity among small mammals, with populations experiencing significant losses while the deer mouse thrived due to its adaptability. This change had ripple effects on ecosystems, affecting soil aeration, seed dispersal, and predator-prey relationships.
A new global approach reveals that climate change played a major role in causing mass extinction of mammals in the late quaternary era. The study shows that continents with larger 'climate footprints' experienced more extinctions, supporting the idea that past climate changes contributed to global extinctions.
A mass extinction of fish 360 million years ago led to the demise of dominant species and created a new world. The Hangenberg event marked a critical shift in vertebrate diversity, with few surviving species giving rise to modern vertebrates, including humans.
A recent study found an alarming pattern of population extinctions among lizard species due to rising temperatures. Climate change is predicted to cause 40% of local populations to go extinct, translating to around 20% of species disappearing by 2080.
A study predicts that rising global temperatures could lead to the extinction of 20% of all lizard species by 2080, with many species already living at thermal limits. The research, led by Barry Sinervo, used field data and modeling to forecast extinction risks for various lizard species worldwide.
An international team of biologists found an alarming pattern of population extinctions due to rising temperatures. The researchers developed a predictive model that accurately predicted specific locations where previously studied lizard populations have already gone locally extinct.
A worldwide study attributes local lizard extinctions to rising temperatures, with a predictive model showing 20% of species could go extinct by 2080. Lizards' decline is linked to reduced foraging hours and energy resources during critical reproductive cycles.
New research reveals that Chytrid fungus kills frog populations when infection intensity reaches a critical threshold. The study found that mass mortalities occur beyond this point, while continuous re-infection causes the disease to reach the threshold.
A team of researchers from the University of Arizona revisited evidence pointing to a cataclysmic event that wiped out North American megafauna, including mammoths and Dire wolves. The study found no conclusive link between an extraterrestrial impact and the extinction of these species.
Researchers tracked salamander movements across all three life stages to understand population stability. The study found that overland movement increased the likelihood of population persistence under low to moderate extinction risk scenarios.
A panel of international experts confirms that an asteroid collision caused the Cretaceous-Tertiary mass extinction, which killed off the dinosaurs and over half of Earth's species. The Chicxulub asteroid impact triggered a global winter, causing widespread destruction and paving the way for mammals to dominate the planet.
A new study finds that a pathogen, not climate change, killed the Monteverde golden toad. Researchers reconstructed moisture levels in the cloud forest over the last century and discovered that dry spells closely tracked El Niño events.
Nannoplankton extinction correlates with latitude, with higher rates in the Northern Hemisphere. Toxic metals from the asteroid impact likely delayed recovery due to impaired photosynthesis and reduced nannoplankton reproduction.
Researchers found that air flows in one direction through alligators' lungs, a trait shared with birds. This unidirectional airflow may have helped archosaurs dominate Earth after the Permian-Triassic extinction, which wiped out 70% of land life.
Researchers analyzed mammal diversity data from 30 million years ago and 500 years ago, finding a significant loss of species following human arrival in North America. The study suggests humans are causing another mass extinction event, with potential conservation efforts able to stem the tide.