Articles tagged with Extinction
A study of lake sediments reveals three major declines of plant-eating megafauna in Panama, which had significant impacts on forests and grasslands. Rewilding efforts by introducing new species or increasing populations of existing ones could restore nature and its benefits to humans.
Researchers shed light on moths & butterflies' evolution, conservation needs, and diverse feeding habits. Discoveries suggest that these insects obtained plant-digesting abilities from fungi, while mandibled moths were once more diverse but largely extinct.
Researchers found that long-standing mating preferences led to sex-biased interbreeding, resulting in the loss of Neanderthal DNA on X chromosomes. The study reveals a complex social history of human evolution, challenging the idea that survival of the fittest drove human migration.
A new study found that turtles' brains can detect unexpected visual stimuli independently of their position on the retina, a property previously thought to exist only in mammals. The researchers believe this ability helped animals understand their spatial environment, learn, and survive complex terrestrial environments.
The discovery of mature silver European eels in Cyprus highlights the importance of river fragmentation and local environmental conditions on eel populations. The finding also underscores the need for urgent implementation of Eel Management Plans to conserve this critically endangered species.
The North American wild mountain sheep is losing its habitat to industrial mining, human activity, and climate change. The book highlights the risks faced by this species, which nearly collapsed in previous decades but now faces grave risks from disease and habitat loss.
A new study reveals that more than 7,000 adult Magellanic penguins were killed by pumas in just four years, posing a significant threat to the penguin population. The research suggests that high puma predation rates could exacerbate reproductive decline and juvenile mortality, ultimately putting the colony at risk of extinction.
Exposure to ozone levels found in affected areas alters the ants' odor signature, causing them to be attacked as if they were foreign intruders. The disruption of chemical communication between adult ants and larvae may also lead to neglect of brood care and larval death.
A comprehensive review reveals devastating loss of island land snail biodiversity, with extinction rates ranging from 30% to 80%. The Hawaiian Islands, in particular, have lost up to 90% of their unique native snail species due to human arrival and colonization.
Scientists have uncovered a treasure trove of 12 million-year-old bird and four frog species in a New Zealand cave, shedding light on the continent's ancient history. The findings suggest that catastrophic climate changes and volcanic eruptions led to frequent extinctions, with around 33-50% of species disappearing before human arrival.
A global study reveals signs of complete extinction in the Canary Islands, where a previously undetected mass mortality event was identified in mid-2022. The affected species is no longer capable of reproducing, potentially leading to local extinction with severe ecological consequences.
Researchers found thousands of hutia fossils in a Caribbean cave, including nests made from compacted soil and coated with a waxy substance. The discovery provides evidence of the presence of bees in the area thousands of years ago, challenging initial findings on wasp nests.
A new Oxford University study finds nearly 8,000 animal species could face extinction by the end of this century due to combined effects of climate-driven extreme heat and human land-use changes. The study highlights the urgency of conservation and mitigation actions globally to prevent immense losses to biodiversity.
Research reveals that threatened species are overrepresented in professional sports emblems, offering a powerful new avenue for biodiversity conservation partnerships. Fans' emotional connections with team mascots can mobilize audiences to support conservation initiatives.
Marine Animal Forests are complex habitats that provide essential ecological services, including biodiversity hotspots, nursery areas, and carbon cycling. Scientists urge immediate action to protect these ecosystems from destructive fishing practices, pollution, and climate change.
A new species of rocket frog, Dryadobates erythropus, has been discovered based on a single dried specimen kept at the Smithsonian Institution's National Museum of Natural History for 62 years. The species is considered 'probably extinct' due to lack of further sightings or specimens in the wild.
The discovery sheds light on marine ecosystems' rapid recovery and complexification after the end-Permian mass extinction. The Spitsbergen fossil deposit reveals diverse marine reptiles, including archosauromorphs and ichthyosaurs, with some species reaching 5m in length.
Researchers have identified three new species of tree-dwelling toads from Africa that skip the tadpole phase and give birth to live toadlets. This rare reproductive strategy is found in less than 1% of frog species, making these toads exceptionally interesting.
A new study reveals that island reptiles are more threatened with extinction than mainland species, yet remain largely ignored by researchers. The study found that 30% of island-dwelling reptiles are threatened, while only 6.7% of reptile-focused research publications have studied them.
Scientists suggest that managing pond conditions can tip the balance in favor of native species. Research found that longer hydroperiods, typically over 110 days, lead to larger and more stable populations.
Researchers developed a tool to measure food production's impact on species survival, finding that eating beef and lamb has the biggest effect on extinctions. Switching to vegetarian diets could halve biodiversity impact in the UK.
A new study reveals the deep connection between wildlife trafficking and other serious crimes, including arms dealing and human smuggling. By mapping these intersections, researchers can focus on key players driving global networks, boosting anti-trafficking interventions.
A new study documents the functional extinction of Acropora corals from Florida's Coral Reef following a record-setting marine heatwave in 2023. The heatwave caused catastrophic mortality rates, leading to a collapse of ecological function and marking what scientists call a functional extinction.
A recent study found that extinction rates in plants and animals peaked around 100 years ago and have declined since then. The researchers argue that past extinctions are not reliable predictors of current and future threats due to changing drivers such as habitat loss and climate change.
A new index tool evaluates species' conservation priority based on future threats and traits, identifying reptiles as highest priority. The Proactive Conservation Index complements existing tools, offering insights into understudied species and facilitating proactive conservation strategies.
A new study suggests that Indigenous Australians may have been fossil collectors, rather than hunters, of Australia's megafauna. The researchers re-analyzed a fossilized tibia bone with an incision and found that it was likely already fossilized when the cut occurred.
A new analytical method reveals that 65.5% of unhatched eggs were fertilized, contradicting previous assumptions. The study's findings can inform management decisions for threatened bird species and potentially accelerate their recovery.
Researchers investigate cryopreservation as a tool for conservation, using the European subspecies of the Swallowtail to assess its viability. If effective, it could support long-term strategies like breeding programs and reintroduction efforts.
Researchers have uncovered a new species of bettong and two new subspecies of woylie in Western Australia, revealing vital clues about the diversity of these critically endangered marsupials. The discovery has significant implications for conservation efforts, including breeding and translocation initiatives.
Recent species-level extinctions are high, but genus-level losses are rare and localized, occurring mostly on isolated islands. The study found that modern extinction rates have not been increasing over the past century, contrary to previous studies.
The Earth BioGenome Project aims to create a digital library of DNA sequences to preserve and protect life on Earth. The project has revealed a refined strategy to scale up the sequencing of 150,000 species, accelerating biodiversity research and global conservation.
A new study reveals a hidden extinction crisis in China's native flora, showing that habitat decline over the past four decades has sharply increased extinction risks nationwide. The findings suggest that current conservation efforts are failing to keep pace with biodiversity threats.
The majority of extant species belong to a limited number of rapid radiations, forming groups with many species that evolved in a relatively short period. These rapid radiations are thought to occur when new ecological niches open up, such as the emergence of multicellularity and powered flight.
Researchers have identified 48 previously unknown bacterial species in the indri's microbiome, which is largely established through transmission between members of the same social group. This finding has significant implications for preserving the species' habitat and preventing extinction.
The study chronicles 220 extinctions in Macaronesia, with half linked to human arrival and a post-human extinction rate exceeding 12 times higher than pre-human periods. Conservation efforts are crucial to mitigate the extinction crisis in these unique island ecosystems.
A new analysis of a 500 million-year-old fossil suggests that arachnids, including spiders and scorpions, evolved in the ocean before adapting to land. The discovery was made by studying the brain and nervous system of an ancient marine arthropod called Mollisonia symmetrica.
A team of scientists proposes using gene editing to restore lost genetic diversity in endangered species, enabling them to adapt to future environmental changes. The approach could complement traditional conservation methods and attract new investors and expertise.
Researchers have identified a new genus of frog, Dryadobates, comprising at least 12 species, with three already declared extinct. The study utilized historical DNA analysis to clarify the taxonomic classification of previously single-species frogs, revealing hidden diversity and extinctions in the Atlantic Forest.
A new analytical method reveals overlooked species at risk of extinction, providing a valuable layer of insight for conservationists. The dual-role approach captures both predator and prey interactions, identifying keystone species and vulnerabilities.
The Nature Relationship Index (NRI) aims to measure a country's sustainable path by assessing its relationships with nature, tracking progress and development. The NRI adds an environmental dimension to the Human Development Index, fostering mutually beneficial relationships between humans and the natural world.
Nearly half of Mesoamerica's 4,000+ tree species are at risk of extinction, primarily driven by agriculture and logging. Conservation efforts are urgently needed to protect these species.
Researchers argue that deliberate full extinction might be acceptable in rare cases, but only with careful consideration of ecological and moral implications. The study calls for robust ethical safeguards and inclusive decision-making frameworks to guide the use of genetic modification technologies.
A recent study documents the discovery of over 100 new ribbon worm species off Oman's coast, highlighting a significant underestimation of global marine biodiversity. The finding underscores the importance of exploring lesser-studied regions, such as the tropics, to uncover the full extent of oceanic diversity.
An international study found that dehorning rhinos resulted in a drastic reduction of poaching, with a 78% decrease in poaching rates. The study analyzed data from 11 Greater Kruger reserves and found that dehorning reduced incentives for poaching, making it an effective conservation strategy.
A new genomic study offers a unique lens for understanding the extinction crisis in Hawai'i, revealing that there is still time to save the critically endangered honeycreeper 'akeke'e. With only 17 species of iconic honeycreepers remaining, efforts to control mosquito populations and conservation breeding programs are underway.
New research finds megalodon preyed upon a variety of species, including fish, sharks, and even crustaceans, contrary to the long-held belief that it targeted large marine mammals. The discovery was made by analyzing zinc isotopes in fossilized teeth, providing insights into the prehistoric shark's ecological versatility.
Scientists analyzed ancient DNA, fossil shape, and habitat data to determine the factors influencing the size of extinct giant ground sloths. The result shows that size differences among sloths have been primarily influenced by the types of habitats they lived in and climate change.
A study by Kobe University reveals that plants reproducing solely through self-pollination likely arose from populations with extremely low genetic diversity. The research found that these species are highly successful at producing fruit and may have an evolutionary edge over outcrossing, raising questions about their long-term viability.
A recent study found that human activities negatively impact plant diversity over vast distances, with natural habitats containing only a fraction of potential species in heavily impacted regions. The DarkDivNet network analyzed 5,500 locations across the globe, revealing alarming effects on biodiversity.
Researchers have mapped the saola's genome, revealing two distinct populations with significant genetic differences, and estimate that fewer than 100 individuals remain, raising hopes for conservation efforts through captive breeding and genetic de-extinction. The study provides new insights into the species' history and future prospects.
The Monte Gordo Grasshopper, thought extinct since 1980, has been rediscovered in Cape Verde's São Nicolau island. The species, a 'living fossil,' has shown remarkable resilience in the challenging environment.
Researchers found that a fertility rate of at least 2.7 children per woman is needed to reliably avoid eventual extinction in small populations. A female-biased birth ratio can reduce extinction risk, helping more lineages survive over time.
A new study published in Proceedings of the Royal Society B: Biological Sciences sheds light on how a 252-66 million-year-old 'marine revolution' influenced foraminifera diversity and survival. The study found that calcareous forams flourished after the MMR, becoming dominant types living today.
Studies suggest that straight-tusked elephants ( Palaeoloxodon antiquus ) could still inhabit Europe today due to the continent's suitable climate. The species helped shape Europe's landscape, maintaining open spaces and light woodlands that still support native plant species.
Scientists have discovered a 113-million-year-old hell ant fossil in Brazil, representing the earliest undisputable geological record of ants. The find showcases highly specialized anatomical features, suggesting unique hunting behaviors in ancient insects.
Researchers used fossil data to predict the home range of Protemnodon, an extinct giant kangaroo, finding it had a smaller foraging range than expected. Climate change and habitat disruption led to local extinction when this small range could not find enough food.
Camille Parmesan wins BBVA Foundation award for her pioneering studies on species shifting their geographical ranges in response to climate change. Her research has provided vital input to conservation strategies, including corridor creation and protected areas.
A 16-million-year-old fossil of a newly discovered extinct dirt ant species, Basiceros enana, has been found in Dominican amber. The Caribbean species is notably smaller than its modern relatives, offering direct evidence of their presence in the region before local extinction.
A study predicts that over 80% of amphibian species in the Upper Paraguay River Basin will lose suitable habitats by 2100. The region, which includes the Pantanal and its surroundings, is expected to experience local extinctions under both optimistic and pessimistic greenhouse gas emissions scenarios.
Scientists at Woods Hole Oceanographic Institution develop a novel approach to assess extinction risk for emperor penguins, revealing they meet criteria for Vulnerable to Endangered under IUCN guidelines. This change highlights the elevated risk emperor penguins face due to future changes in their Antarctic habitat.