Articles tagged with Extinction
A new study finds that cold-water species are more resilient to climate change than previously thought, with many populations expected to persist this century. Mountain landscapes play a crucial role in preserving biodiversity, giving conservationists time to complete extensive surveys and develop effective conservation strategies.
Scientists studying ancient mammal relatives known as therapsids found that they had shorter life expectancies and bred at younger ages to survive the drastic climate change. This adaptation allowed them to thrive in the aftermath of the Permo-Triassic Mass Extinction, which pushed billions of tons of carbon into the atmosphere.
Researchers from the University of Zurich found that the diversity of megalodon's prey decreased, leading to its extinction. The team analyzed 200 records and reconstructed the species' range over time, concluding that competition with new predators was a key factor in its demise.
A recent study by three paleontologists reveals that over 85% of mammal species at high risk of extinction lack a fossil record. The researchers found that body size and geographical range are key factors in determining whether a species will leave behind a fossil legacy.
A global study found that invasive mammal eradications on islands result in substantial conservation gains, benefiting 596 native species populations. The research demonstrates the effectiveness of this simple and cost-effective conservation intervention.
A return on investment model could bring clarity and openness to resource allocation for endangered species recovery. By redistributing funds from overfunded to underfunded species, over 180 plant and animal species may see improved recovery success rates.
New research reveals that ichthyosaurs, highly diverse during their reign, were negatively affected by global changes leading to their extinction. A two-phase event suppressed ecological diversity and wiped out the group at the beginning of the Late Cretaceous period.
New research highlights uncertainty in global biodiversity data due to species sighting recording methods. Recording absences is crucial for effective conservation prioritization, as lack of data doesn't necessarily mean a species is absent.
Researchers developed a new model to estimate male lion mortality, providing insights into human impact on populations. The model can be applied to various species facing local extinction, enabling data-driven conservation strategies.
Researchers confirm shelled mammal as armadillo's ancestor, revealing recent ancestral connections that have long fascinated biologists. The study sheds light on the glyptodont's place within the Xenarthra group and its extinction during the Ice Age.
Low oxygen levels hampered life's recovery after the Permian-Triassic extinction, which wiped out 90% of species. Oxygen levels didn't return to pre-extinction levels until 5 million years later, when climate stability increased.
Hunter-gatherer Aleuts on Sanak Island, Alaska, used a super-generalist diet to stabilize marine food webs. Their prey-switching behavior helped maintain ecosystem balance.
Botanists in Hawai'i have discovered a new species of plant with heart-shaped fruits, which they named Coprosma cordicarpa. The new species is a member of the coffee family and is currently listed as vulnerable to extinction due to its limited range and rarity.
A recent study reveals the discovery of five extinct rail species in Madeira and Azores, highlighting the fragile nature of island ecosystems. The species evolved flightlessness due to habitat changes caused by human arrival, leading to their extinction.
A new study shows that parasitic flies may drive Darwin's finch populations to extinction in several decades. However, a modest reduction in fly prevalence through human intervention could alleviate the risk. Researchers propose various methods for controlling the fly population, including introducing wasps and using insecticides.
A Yale-led study suggests that species rarity may be a key indicator of mass extinctions, which could provide an early warning system for the current biotic crisis. The researchers propose that monitoring changes in species and ecosystems can help scientists pinpoint mass extinctions before they become catastrophic.
Mexican authorities instituted an emergency ban on gillnetting to save the critically endangered vaquita, with scientists reporting a hopeful model for sustainable fishing coexistence. Researchers also presented studies on declining polar bears and potential methods to reduce bycatch in non-mechanized fisheries.
A new study found that modern birds arose in what is now South America around 90 million years ago. The research suggests that birds survived the Cretaceous-Paleogene extinction event and then diversified during periods of global cooling, with diversification rates increasing as the climate cooled.
A recent study from Australia found that urban environments contain disproportionately more threatened protected species in a given area than non-urban environments. Cities consistently supported a greater number of protected species than other areas, showcasing the importance of cities in tackling biodiversity loss.
Researchers developed a theory explaining the lifetime of turbulent flows by drawing an analogy with ecosystems near extinction. Computer simulations showed that turbulence excites and inhibits large-scale zonal flow, leading to oscillations in its intensity.
A new study supports the Lilliput effect, where mass extinctions lead to temporary size reductions in species. Smaller vertebrates with higher reproductive rates and shorter lifespans were more resilient to extinction events, while large vertebrates struggled to adapt.
A study published in Current Biology confirms the phenomenon of horizontal extinction cascades, where the loss of one carnivore species can trigger the demise of fellow predators. The researchers' findings suggest that adopting a whole system approach is crucial for effective conservation.
Researchers have found datable volcanic ash deposits in the Karoo Basin that suggest two phases of the extinction event occurred at least 1 million years apart, rather than concurrently. The study provides new insights into the timing and impact of the Great Dying, one of Earth's largest mass extinctions.
Researchers found a decrease in weaning age among fossil mammoths, suggesting human overhunting was the primary cause of their extinction. The study used nitrogen isotopes preserved in tusks to estimate weaning ages and found a significant decrease from 7 to 4 years.
New data suggests that ancient humans played a role in the extinction of large mammals, birds and lizards in Australia. The study's findings place human predation as the most likely cause, with a 10,000-year lag between human arrival and impact on megafauna.
New research supports the idea that human hunting contributed to the decline and extinction of large mammals in the Americas. The study found that the animals' demise began between 13,300-15,000 years ago in Alaska and spread southward across North America and into South America.
The extinction of large herbivores during the Late Pleistocene led to significant changes in vegetation composition and landscape openness. This study reveals that large herbivores play a crucial role in shaping their environments, which has major consequences for other species and ecosystem processes.
The study analyzed past large-mammal extinctions in North and South America to understand their long-lasting ecosystem impacts. Researchers found that the disappearance of mammoths and mastodons led to changes in vegetation, decreased small mammal diversity, and altered landscape dynamics.
A study by University of Liverpool scientists found that amphibians using toxins for defense are at higher risk of extinction, contradicting a long-held evolutionary hypothesis. This discovery challenges our understanding of the relationship between defense mechanisms and species diversification.
Researchers found that weaning age decreased by about three years over 30,000 years leading up to the woolly mammoth's extinction. This shift suggests hunting pressure was a primary cause of extinction, contradicting previous hypotheses pointing to climate change.
New evidence shows that asteroid impact on Earth 66 million years ago accelerated volcanic eruptions in India for hundreds of thousands of years. The eruptions, known as the Deccan Traps, likely suppressed recovery of life for 500,000 years after the KT boundary.
Researchers used fossil data to analyze stability of ecological communities before and during the Permian-Triassic Extinction. The study found that locally stable webs increased while diversity richness declined. Stability was attributed to functional organization within species groups, not biodiversity loss.
A new study explores how ancient South African ecosystems responded to the 'big 5' mass extinction, revealing that species with important roles in food webs were most vulnerable to extinction. The research highlights the critical importance of understanding food webs in predicting community stability during times of great change.
New evidence suggests that a massive asteroid collision with Earth triggered increased volcanic activity in the Deccan region of India. High-resolution argon dating revealed a dramatic increase in eruption rate within 50,000 years of the impact.
A new study found that species extinction can lead to secondary extinctions of parasites, compromising ecosystem stability and biodiversity. Researchers identified key host species that contribute to the overall network structure of fish communities and are essential for maintaining a healthy ecosystem.
A new study by researchers from Linnaeus University demonstrates that a higher degree of individual variation is beneficial to populations and species. The findings suggest that more variable populations are less vulnerable to environmental changes, show decreased fluctuations in population size, have superior establishment success, la...
A new study by UC Santa Barbara researchers predicts that climate change will cause significant reshuffling of marine biodiversity, with warming oceans leading to the relocation of nearly 13,000 species. This redistribution is expected to increase biodiversity in many areas but also lead to extinctions and homogenization of communities.
Scientists confirm human activity, not climate change, as main driver of megafauna extinction over the last 80,000 years. The study's findings shed light on a long-standing debate and suggest that early humans were responsible for the demise of iconic species such as the woolly mammoth and sabretooth tiger.
A new study by UK scientists found that geographically widespread animals are not immune to extinction during global mass extinction events. In contrast, they discovered that widely distributed animals are just as likely to suffer extinction as those with smaller geographic ranges.
A recent study found that Hawaii has lost a significant portion of its unique and diverse invertebrate species, with only 15 out of 325 recognized Amastridae species still alive. Globally, the team estimated that up to 14% of Earth's animal species may have been lost due to human activities.
Researchers find that presenting a new outcome instead of omitting an expected threat can lead to more effective fear extinction in both rats and humans. The study's findings have implications for the treatment of anxiety disorders, including posttraumatic stress disorder and phobias.
The study reveals that Darwin's finches have reached an equilibrium due to increased diversity, with no room for new species unless one existing species becomes extinct. Other species like mockingbirds are still diversifying and evolving more slowly.
A new study confirms that humans are causing a rapid pace of species loss, with extinction rates up to 100 times faster than normal, threatening ecosystem services and human survival. The researchers warn that inaction will lead to irreversible damage, but call for urgent conservation efforts to avoid a sixth mass extinction event.
A survey reveals that UK hospital post mortems are disappearing, with only half of one percent carried out in 2013. This decline has significant implications for quality assurance, public health, and the teaching of medical students.
A new study from the University of East Anglia suggests that critically endangered species should be left to breed in the wild, rather than in captivity. The research challenges the assumption that captive breeding is always a good idea when a species is close to extinction in the wild.
A new study published in Nature reveals that sexual selection improves population health by removing harmful genetic mutations, allowing species to flourish and avoid extinction. This finding provides direct support for the idea that sex persists as a dominant mode of reproduction due to its role in maintaining genetic diversity.
A new study led by University of Southampton researchers suggests that ocean acidification may not have caused the mass extinction of ammonites and other planktonic calcifiers. The research found that the asteroid impact was the primary cause of the extinctions, but not due to ocean acidification levels being too weak.
A study using fossils to predict extinction risk identifies vulnerable ocean ecosystems and species, providing a baseline for conservation efforts. The analysis finds that animals with small geographic ranges and certain groups are more prone to extinction, highlighting the need for targeted conservation and management.
Researchers at University of Cincinnati uncover evidence that bison, deer and other present-day species survived Ice Age climate change, while mammoths and mastodons perished. Fossil analysis reveals radical shifts in environmental temperature and vegetation, forcing animals to adapt or die.
The Capitanian extinction, dated to 262 million years ago, is now recognized as a major extinction event globally, with severe losses in brachiopods at high latitudes and widespread loss of carbonates across the Boreal Realm. This new evidence supports its status as a true mass extinction, updating the 'Big 5' list to the 'Big 6'.
A LiDAR study documents the impact of a 2013 Colorado Front Range flood on the landscape, revealing unprecedented hillslope failures and landslides. The research highlights the role of rare events in shaping landscapes over time scales that greatly exceed historical records.
Researchers found that beetles have among the lowest family-level extinction rates due to their ability to adapt to changing environments. The study suggests that beetle diversity may be due to an historically low extinction rate rather than a high rate of new species emerging.
Researchers found that deadly frog fungus Batrachochytrium dendrobatidis has been present in Illinois and Korea since the 1880s, with stable dynamics for over 100 years. This discovery helps scientists better understand the disease caused by Bd and its survival conditions.
A new study reveals that plants have been highly resilient to mass extinction events, with negative rates of diversification never sustained for long periods. Plant groups such as flowering plants (angiosperms) experienced a rapid increase in diversity shortly after the Cretaceous-Paleogene asteroid impact.
A new study suggests that understanding species extinction can help drive cancer cells to annihilation. The authors identify two critical factors governing species resistance to extinction: evolveability and robustness to perturbations. These characteristics may have important correlates among some types of cancer cells.
A new study by the University of Sheffield has found that 20-25% of well-known sea species are threatened with extinction. The research highlights the need for more comprehensive assessments of marine species, which currently have been completed for only three percent of cases.
A study by Temple University researchers found that an estimated 28,000 endangered Madagascar lemurs are being illegally kept as pets in urban areas, threatening conservation efforts. The trade may drive some species closer to extinction and cause populations to go extinct altogether.
New research confirms that massive volcanic eruptions 66 million years ago spewed climate-altering gases into the atmosphere before and during the K-Pg extinction event, which claimed non-avian dinosaurs. The Deccan Traps' eruptions are now considered a key factor in the extinction event.
A DNA study from Duke University sheds light on the extinction of giant lemurs, finding that their smaller population sizes made them more susceptible to extinction. The research suggests that lessons learned from ancient DNA can be useful in protecting remaining species.
Scientists develop model to predict which populations will go extinct due to climate change by analyzing how different species adapt. The study finds that small changes in climate can lead to sudden extinction, even for species with strong adaptation strategies.