Scientists predict that rare Amazon tree species could suffer up to 50% extinction rates, while common tree species may survive. The Amazon basin contains about 40% of the world's remaining rainforest, with many rare species present.
Researchers from UC Berkeley argue that devastating declines of amphibians worldwide signal a biodiversity disaster. The study highlights the impact of chytridiomycosis, habitat constriction, and pollution on frog populations, contributing to a sixth mass extinction event.
A new report details the historic mass extinction of amphibians, with extinction rates reaching unprecedented levels. The authors attribute the decline to human activities exacerbating climate change and a deadly infectious disease, chytridiomycosis.
Research by UK and Australian scientists suggests that humans hunted Tasmania's giant kangaroos and marsupial 'rhinos' and 'leopards' until their extinction, contrary to previous climate change theories. The findings provide the first evidence of human involvement in the mass extinction event, which took place around 41,000 years ago.
A comprehensive review of the world's 634 kinds of primates found almost 50% at risk of extinction, with habitat destruction and hunting being major threats. Conservationists highlight successes in helping targeted species recover, but stress the urgent need for reforestation to protect remaining populations.
The kipunji monkey is critically endangered with only 1,117 individuals remaining in the wild. Habitat degradation and poaching pose significant threats to its survival.
Massive underwater volcanic eruptions occurred 23 thousand years before a global oceanic anoxic event, leading to the extinction of ocean life. The eruptions released nutrients and oxygen-depleting gases, causing a chain reaction that ultimately led to the mass extinction.
Researchers identified certain genes that enable frogs to develop resistance to harmful bacteria and disease. The discovery may provide new strategies for protecting frog populations in the wild by selectively breeding individuals with known disease-resistance genes.
A third of reef-building corals are threatened with extinction, according to a comprehensive global assessment. Climate change and human activities such as destructive fishing and pollution are leading causes of coral bleaching and disease.
Researchers found that current mathematical models overlook random differences between individuals in a given population, leading to underestimated extinction risks. The study's results suggest that factors such as sex ratio variations and physical variation within populations can significantly impact extinction rates.
A new study suggests that changes in ocean environments related to sea level exert a driving influence on rates of extinction, leading to the loss of up to 75-95% of species. The research links mass extinctions over time, establishing a common link and providing insight into who survives and who doesn't across these boundaries.
A large genetic study of the extinct woolly mammoth has revealed that it did not have much genetic diversity and was split into two groups. The discovery rules out human hunting as a contributing factor to its extinction, instead pointing to climate change and disease.
Research from the American Museum of Natural History shows that global warming is causing species in Madagascar's mountainous north to move up tropical mountains as their habitats shift upward. The study found an average shift of 19-51 meters over a decade, linked to temperature increases of 0.1°C to 0.37°C.
A recent study reveals that 16 out of 21 oceanic shark and ray species are at risk of extinction due to unregulated and unsustainable fishing practices. Governments can take key steps to safeguard populations, including establishing science-based catch limits and ending shark finning.
Researchers at the University of California, Berkeley, have improved the argon-argon dating method to provide more precise absolute dates for geologic events, including the Cretaceous-Tertiary boundary and dinosaur extinction. The new date is 65.95 million years ago, with an uncertainty of 40,000 years.
A new study reveals that climate change led to habitat loss in mammoth territory, pushing the species towards extinction. Human hunting acted as the final straw, with scientists estimating that humans would only need to kill one mammoth every three years to push the species to extinction.
Scientists found that humans first hunted the flightless sea duck more than 10,000 years ago, but it persisted until about 2,400 years ago. The prolonged survival of the bird challenges the 'Pleistocene over-kill theory', which suggests that human arrival led to rapid extinction.
Scientists warn that butterflyfish, such as the Chevroned Butterflyfish, are at risk of extinction due to their specialized feeding habits. The coral reefs' decline is threatening these fish's survival as they can only eat one type of coral, leading to a high risk of extinction.
New seismic images of the Chicxulub crater suggest the asteroid that killed the dinosaurs landed in deeper water than previously thought. This led to a larger release of water vapor into the atmosphere, which could have exacerbated the effects of acid rain and climate change.
A series of massive volcanic eruptions in India may have killed the dinosaurs 65 million years ago, rather than a meteor impact. Microscopic marine fossils found in sediments near the Bay of Bengal support this theory, directly linking the Deccan Traps to the mass extinction event.
A new study suggests that the Great Dying 250 million years ago may have been caused by creeping environmental stress from volcanic eruptions and global warming. The research finds that organisms in the deep ocean died first, followed by those on ocean shelves and reefs, supporting a model that attributes the extinction to enormous vol...
A team of Harvard researchers has found that organisms must stay below a mutation rate of 6 per genome per generation to prevent extinction. This discovery explains why some species are more resilient to genetic changes and offers insights into the physical properties of genetic material and its impact on survival fitness.
A new study by an international team of researchers provides a breakthrough approach to understanding the role of climate in the Neanderthal extinction. The findings suggest that there was no single climatic event that caused the extinction, but rather indirect effects on competition with other human groups.
A new study led by the University of Leeds suggests that extreme climate events did not coincide with Neanderthal extinction, contrary to previous theories. The research provides a more detailed picture of the climate at the time of the Neanderthals' disappearance, suggesting indirect competition with other human groups.
A recent study by UWM paleoecologist Margaret Fraiser suggests that elevated CO2 levels contributed to the Permian-Triassic mass extinction, with bivalves emerging as the only survivors. The research provides valuable insights into the impact of CO2 on marine ecosystems and could help scientists predict future oceanic changes.
A new study finds that climate change is isolating groups of alpine butterflies in the Canadian Rockies, leading to population decline and increased risk of local extinction. The expanding forests and reduced prescribed burns are limiting the butterflies' ability to fly and reproduce, threatening their survival.
Researchers found a massive, rapid release of carbon may have triggered the Permian-Triassic extinction. The Great Bank of Guizhou fossil beds in China provide valuable insights into this event.
Researchers found that specialized diets of bat species may contribute to their extinction risk. Contrary to previous studies, dietary breadth was not related to geographic range size or wing structure.
Researchers at MIT's Picower Institute have discovered a molecular mechanism that governs the formation of fears stemming from traumatic events. Inhibiting a kinase called Cdk5 facilitates the extinction of fear, while increased activity persists fear learned in a particular context.
A team of scientists from WWF and Conservation International has discovered the world's largest known population of grey-shanked doucs, increasing chances that the endangered monkey can be saved from extinction. The population is estimated to have over 180 individuals, with significantly more potentially living in adjacent forest areas.
Researchers found that a unique, highly carnivorous Alaskan wolf species vanished after the end of the last Ice Age. The study revealed a distinct genetic profile and diet, which suggests these wolves were specialized for large prey and possibly scavenging.
Researchers discovered Alaska's ancient wolves were distinct from modern wolves, with robust bodies and massive canine teeth. The study suggests these specialized hunters and scavengers thrived in ancient Alaska, but their extinction portends potential demise of similar predators due to global warming.
A new study by Samantha Price finds that large grazing animals face a higher risk of extinction under intense hunting pressure. The analysis reveals that reproductive speed is the key variable in determining extinction risk, with species like the American bison being nearly wiped out due to slow reproductive cycles.
A University of Granada research group found that climate change, not modern humans, contributed to the Neanderthal extinction in the Iberian Peninsula. Climate reconstructions revealed fluctuations related to climate changes before Homo Sapiens arrived, making cold and arid conditions the least favorable for Neanderthals.
Ecologists and philosophers protest a new definition of 'endangered species' that could weaken the federal Endangered Species Act of 1973. The new definition limits endangered species to those at risk of extinction within their current range, which may hinder conservation efforts for species like wolves, grizzly bears, and jaguars.
A new study reveals that the mass extinction event that wiped out dinosaurs did not prompt the rapid diversification of modern mammal species. Instead, these early mammals evolved and radiated around 10 million years after the dinosaurs' demise, driven by a sudden increase in global temperature.
A comprehensive assessment by Conservation International found that 20 grouper species are threatened with extinction, with eight already listed as under extinction threat. The report highlights the need for better fishery management and marine protected areas to prevent further decline.
A team of researchers calls for better forecasting of extinction rates due to global warming. They argue that current models overestimate extinction risks and propose eight recommendations to improve forecasts, including clarifying biodiversity definitions and testing existing models more rigorously.
A linguistics expert predicts that nearly all human languages could be extinct in two centuries if not conserved. The loss of languages would also compromise humanity's adaptability and diversity, making it harder to survive.
A new DNA sequencing approach allows researchers to analyze ancient ecosystems in just a few hours, providing more accurate and complete information. This breakthrough helps scientists better understand past climates, species decline, and potential causes of extinction.
Researchers at Yale University developed a method to trap viruses in cells that prevent their reproduction, potentially alleviating disease. By using 'trap cells' with viral binding sites, the virus population declines towards extinction when the number of trap cells exceeds a threshold.
A new study found that the simultaneous effect of habitat fragmentation, overexploitation, and climate warming accelerates population decline and increases the risk of extinction. Experimental microcosm populations of rotifers showed significant declines under individual threats, but even faster declines when exposed to multiple threats.
A new study reveals that human behavior can trigger a 'rarity effect' in endangered species, driving them into an extinction vortex. This phenomenon resembles the Allee effect, where low population densities increase extinction risk. The pursuit of rare species for luxury items or social status exacerbates this effect.
A 250M year-old mass extinction event led to a profound ecological shift in the world's oceans. Simple marine ecosystems were largely displaced by complex ones, reflecting a rise in mobile organisms with higher metabolism. This change has continued ever since, with current human activities potentially reversing this trend.
A recent University of Colorado at Boulder study reveals that Paranthropus robustus had a diverse diet including fruits, nuts, sedges, and possibly animals, casting doubt on the idea that its extinction was linked to its eating habits. The findings suggest alternative explanations for the species' demise.
Scientists have proposed a new theory that combines deadly sudden catastrophes (pulses) with longer, steadier pressures on species (presses) to explain Earth's mass extinctions. The Press/Pulse theory suggests that these combined events are necessary for big extinctions to occur.
A team of paleontologists proposes that the Chicxulub meteor impact was not the sole cause of the dinosaurs' demise. Instead, they suggest that a series of massive meteor impacts, volcanic eruptions, and climate change culminated in the end of the Cretaceous Period.
Research led by USC earth scientist David Bottjer suggests the Earth's environmental stressors led to mass extinction, contradicting meteorite strike theory. The study proposes a warming Earth and reduced ocean circulation as key factors in creating an environment where toxic hydrogen sulfide dominated, leading to species disappearances.
The tropics are revealed as the Earth's most fruitful biodiversity spawning ground, with fossil data indicating a consistent pattern of extinction, origination, and immigration. The study suggests that human-caused extinctions in the tropics will have long-term consequences on global biodiversity.
Researchers predict that climate change will reduce cyclamen's ideal climate range by over 60% within the next 50 years, putting many species at high risk of extinction. Mathematical modeling indicates that the plant may disappear from certain regions by the 2050s.
New fossil evidence reveals plant and insect diversity were out of balance during Paleocene Epoch. Insect predation was low in most areas, but unexpectedly high in two early Paleocene sites, Castle Rock and Mexican Hat.
A study by UC Riverside researchers found that the California wild radish is a hybrid of cultivated radish and jointed charlock, having completely replaced its ancestors in less than 100 years. The researchers attribute this rapid spread to unique traits such as unswollen roots and early flowering.
The study estimates that birds have been going extinct at a rate of about one species per year since 1500, exceeding the natural rate by 100 times. Conservation efforts are reducing extinction rates to about one bird species every three or four years, but more species are likely to disappear during the 21st century.
The study found that species with smaller range areas are at higher risk of extinction due to increased vulnerability to habitat changes. Larger range sizes, on the other hand, result in fewer but larger populations, making them less susceptible to population wipeouts.
Scientists have rediscovered two Critically Endangered frog species in the El Dorado Nature Reserve in Colombia, providing a glimmer of hope for saving these endangered species from extinction. The reserve's protection is timely, as the region has recently been affected by a fungal disease that has wiped out many amphibian populations.
A team of scientists from Ohio State University has discovered a massive crater, hidden beneath the East Antarctic Ice Sheet, which could date back to the Permian-Triassic extinction event. The crater is estimated to be four times wider than the Chicxulub meteor that may have killed the dinosaurs.
A coalition of conservation groups protected a vital 1,600-acre site in Colombia's Sierra Nevada de Santa Marta massif, safeguarding the last breeding ground of the Globally Endangered Santa Marta Parakeet. The site also provides habitat for 18 bird species and five threatened amphibians.
A palaeontologist proposes that gradual climate change caused most mass extinctions, including the Permian and Triassic events. This theory challenges the widely accepted asteroid impact hypothesis.
Low oxygen levels in ocean 'dead zones' can induce sex changes in embryonic fish, leading to an overabundance of males and potentially threatening species with extinction. The study found that 75% of zebra fish developed male characteristics under low oxygen conditions.
Researchers found that extinction-proof population sizes are impossible to predict based on species characteristics alone. The study highlights the complexity of extinction risks and challenges traditional assumptions about species survival.