Articles tagged with Invertebrates
A large-scale international study, led by Tel Aviv University's Dr. Omri Bronstein, found that many species of echinoids, including sea urchins, survived a mass extinction event 50 million years earlier than thought. The findings suggest that estimates of evolutionary timelines may err by tens of millions of years.
Fossil analysis reveals mollusk communities were resilient to major climatic shifts but struggled under human-induced changes, highlighting the need for conservation efforts.
Researchers at Virginia Tech discovered 17 new species of twisted-claw millipedes, including Nannaria swiftae, named after singer-songwriter Taylor Swift. The millipedes play a valuable role in decomposing leaf litter and have unique characteristics such as shiny caramel-brown bodies with white spots.
A new study found that mountain streams are signaling climate change through changes in invertebrate populations, which can indicate ecosystem health. The researchers discovered that diversity tends to increase downstream but is lowest near lakes, highlighting the need for protecting these ecosystems from diversions and habitat damage.
Researchers sequenced DNA from hundreds of bryozoan specimens to study their evolution. They found that species with brooding chambers had higher diversity, as these structures confer a clear benefit to the parent colony.
Researchers found that faster-moving ants in a raft lead to expansions and protrusions, potentially used for sensing environments. The team's findings can inform the development of intelligent swarm responses for robotics and next-generation materials.
A new study reveals that marine organisms attach themselves to plastics and are transported by marine currents, contributing to the introduction of non-native species. The research found diverse marine life attached to plastic debris, including bryozoans, which could become invasive and alter ecosystems.
Scientists have discovered that the genomes of marine invertebrates have been surprisingly stable across deep time. The study found that chromosomes are remarkably similar among sponges, jellyfish, scallops, and even humans, with some genes traveling together for almost a billion years.
Scientists at UCR have discovered a new species of nematode parasite that infects and kills tarantulas, exhibiting strange behaviors like walking on tiptoe and loss of fang control. The parasite, Tarantobelus jeffdanielsi, is named after actor Jeff Daniels, who saved fictional spiders in the 1990 film Arachnophobia.
A recent comprehensive assessment reveals drastically increased species extinctions and declining populations, indicating the onset of the Sixth Mass Extinction. The study emphasizes the urgent need for conservation efforts and a recognition of humanity's common responsibility to mitigate the crisis.
A massive fossil of the giant millipede Arthropleura has been discovered in Northumberland, England, revealing it was up to 2.7 meters long and weighed 50 kilograms. The find sheds new light on the animal's habitat and evolution, suggesting it preferred open woodland habitats near the coast.
A study by UC Riverside scientists has identified a set of genes on a single chromosome associated with the production of male or female offspring in ant colonies. The discovery sheds light on the complex relationships between genetics and environmental factors in shaping the sex ratio of these societies.
A group of Croatian students used photographs from iNaturalist to describe a new species of pygmy grasshopper, challenging traditional methods. The study highlights the potential of citizen science and encourages people to engage with nature to raise awareness about conservation.
A new study from Australian Institute of Marine Science reveals that reef fish such as emperors, tropical snappers, and rockcods play a crucial role in controlling crown-of-thorns starfish numbers on the Great Barrier Reef. By removing these fish species, the abundance of coral-eating starfish increases.
A new study reveals that Asian honeybees use distinct signals to alert nestmates of giant hornet attacks, employing a sophisticated communication system. The research found that these signals are designed to get the attention of colony members and convey a sense of urgency.
Researchers have discovered a new genus and species of tardigrade fossil, Paradoryphoribius chronocaribbeus, preserved in 16-million-year-old Dominican amber. The specimen is the first tardigrade fossil recovered from the Cenozoic era and offers insights into the evolution of this ancient lineage.
Researchers at University College London discovered that worm mothers secrete a milk-like fluid to support their offspring's growth. This unique selfless act helps explain mysteries about the biology of ageing in nematode worms, which could have far-reaching implications for understanding human ageing.
Researchers describe a new modern-looking tardigrade fossil, Paradoryphoribius chronocaribbeus, found in Miocene Dominican amber. The study reveals unique foregut organization and contributes to the scant tardigrade fossil record, providing insight into the ancient superfamily Isohypsibioidea.
A study published in Nature Communications Earth & Environment reveals that ʻopihi age, growth, and longevity are influenced by the Hawaiian intertidal environment. The research team found that ʻopihi species grow rapidly, reaching maturity within 8-9 months, and can live up to 5 years old.
Researchers describe two new species of fossil ctenophores from Utah with preserved nervous systems and up to 24 comb rows. These findings suggest that Cambrian ctenophores had more complex nervous systems than living species, with specific nerve tracks along the body and a ring around the mouth.
A Yale study has identified significant gaps in biodiversity maps, limiting effective conservation decisions globally. The researchers created regional trends maps to assess the distribution of 31,000 terrestrial vertebrates, highlighting opportunities for citizen scientists and government agencies to support biodiversity monitoring.
A 48-year record of Australian collecting trips has been made publicly available, providing accurate details on specimen collection dates and locations. The data is now accessible via the Zenodo open-data repository in Darwin Core format.
Researchers at Smithsonian Tropical Research Institute characterize an acute marine hypoxic event in the Caribbean, impacting brittlestars and corals. The study reveals a resilient microbial community that adapts to deoxygenation, providing insights into the historical context of such events.
The deep-sea ecosystems of the Salas y Gomez and Nazca ridges are characterized by exceptional biodiversity, hosting rare and unique species of fish and invertebrates. These findings have significant implications for conservation efforts, emphasizing the need to protect these unique environments.
A recent study identified 363 marine invertebrate RNA viruses from 58 samples, revealing high genetic diversity and elasticity. The findings suggest possible virus transmission across different ocean areas and host species, shedding light on the origin of hantaviruses.
A mathematical model reveals how two radically different communities coexist beneath California's iconic kelp forests. The model accounts for the growth rate and mortality of algae and invertebrates, as well as the lifecycle of giant kelp and sunlight availability. This dynamic foundation species allows competing groups to dominate at ...
Researchers studied leech reproduction and found that EE2 had little impact on abundance but some effects on gonad size. Leeches may be less sensitive to endocrine disrupting compounds than previously thought.
Researchers developed a novel machine learning procedure that resolved Paleozoic biodiversity to within 26,000 years, clarifying diversification and extinction events. The improved resolution revealed new aspects of Paleozoic biodiversity and showed a correlation between atmospheric carbon dioxide levels and paleobiodiversity change.
A study of 15 South Tyrolean waterways found that extensive pastures increase biodiversity in streams and rivers. Aquatic macroinvertebrates perform more diversified tasks in pastures, with greater species diversity than in woodland and rocky areas.
Scientists warn that Antarctic species are at risk due to declining oxygen levels in the ocean, which could lead to extinction for larger marine invertebrates and fish. The study found that some species have evolved mechanisms to compensate for reduced oxygen, but many large species will likely be impacted by climate change.
The study analyzes genome data from multiple species, including humans, mice, and zebrafish, to understand the evolutionary transition from invertebrates to vertebrates. The research identifies key differences in gene regulation between vertebrates and invertebrates, highlighting complex gene regulation and specialization.
A new invasive species, Bugula neritina, has been detected in the Ketchikan region of Alaska, along with three other non-native species. The discovery highlights the importance of early detection and monitoring to control the spread of invasive species in Alaskan waters.
A recent study reveals that the marine heatwave had a significant impact on fish and invertebrate communities across the Great Barrier Reef and Coral Sea. The loss of coral was only part of the story, with changes also occurring in other animal populations.
Researchers from University of Texas at El Paso discover that high desert winds disperse small invertebrates and colonize hydrologically disconnected basins. The findings have large implications for understanding the wind-aided dispersal of freshwater organisms, which are crucial to the food web.
Researchers mapped the global impact of shrinking glaciers on river invertebrates, revealing a consistently patterned response across diverse regions. The study highlights the potential to track environmental impacts on invertebrate groups using trait-based approaches.
The discovery of 15 new species in the genus 'smiley faced' spiders challenges previous estimates of biodiversity in the Caribbean. Researchers named these species after notable figures including Obama, Sanders, David Bowie and DiCaprio to promote awareness about human rights, equality and climate change.
A new study sheds light on the largely understudied area of vertebrate scavenging ecology. Researchers found that vertebrate communities are efficient at locating varying sized carcasses, but not as efficiently in warmer months when invertebrates and microbes are more active.
A new study reveals that marine invertebrate predators have increased in size over the past 500 million years, while their prey has remained relatively constant. The 'escalation hypothesis' is supported by the findings, which show a significant increase in predator-prey size ratio driven by changes in marine ecosystems.
Conservation assessments for endemic earthworm species in KwaZulu-Natal Province are hindered by lack of common names. Assigning English names facilitates inclusion in environmental impact assessments, highlighting the importance of biodiversity preservation.
A team of European paleontologists challenged the fundamentals of echinoderm evolution by discovering that some ancient groups survived the end-Paleozoic extinction. The findings revealed that these surviving echinoderms coexisted with modern sea urchins and brittle stars, stretching across various paleo-environments by the late Triassic.
A new study suggests that warmer water temperatures may not accelerate leaf litter decay as much as previously predicted, with an estimated 5-21% increase in breakdown rates. This could imply a more consistent balance between carbon dioxide release and retention in solid form.
The study reveals three new species of land flatworms from the Brazilian Araucaria forest, contributing to the region's high biodiversity. The discovery sheds light on the importance of these organisms as bioindicators for habitat impact assessment.
Researchers found that invasive species on Hawaii Island are successful invaders due to their scavenging abilities, which create a nutrient resource for other invasive scavengers. Invertebrates and vertebrates consumed 55% and 10% more carcasses than invertebrates alone, respectively.
A new family of earthworms, Kazimierzidae, has been established for a South African genus with an exclusive circulatory system. The species are restricted to small areas along the western and south-western Atlantic coast of South Africa.
A scientist at SUNY College of Environmental Science and Forestry has discovered that a dip in beer can sedate and immobilize tiny snails before a terminal dunk in ethyl alcohol, reducing physical distress. This humane method is similar to those used with domestic animals.
A new species of scorpionfish, Scorpaenodes barrybrowni, has been discovered in the Caribbean by a team of scientists using a manned submersible. The fish is found at depths between 95m and 160m, making it the deepest-living member of its genus in the western Atlantic Ocean.
A study found that temporary streams suffer from a significant decline in invertebrate species during droughts, with only three species remaining after a long drought and 24 species after shorter dry spells. The research highlights the potential consequences of climate change-related increases in drought length on aquatic ecosystems.
Brazilian researchers have discovered five new species of marine invertebrates, the ascidians, which are rich in natural compounds with potential uses in medicine. The newly found species contain substances that can eliminate cancer cells but also destroy healthy cells.
A long-term study on house sparrows found that offspring of older parents produced fewer young. This transgenerational age effect was confirmed by researchers for the first time in free-living animals.
The study found that disease was the primary culprit, accounting for 26% of mass die-offs, while direct human effects and biotoxicity from algae blooms contributed significantly. The number of mass mortality events has been increasing by about one event per year over 70 years.
A genomic analysis of a newly discovered virus prevalent in symptomatic sea stars has linked Sea Star Associated Densovirus to the devastating wasting disease, potentially triggering an unprecedented ecological upheaval. The research lays the groundwork for understanding how the virus kills sea stars and what triggers outbreaks.
Researchers have discovered tetrodotoxin, a potent paralysis-inducing neurotoxin, in two species of terrestrial flatworms. The toxin was found to be used during predation to subdue large prey and may also play a role in defense through egg capsules.
A new coral reef species, Echinophyllia tarae, has been discovered in the Gambier Islands of French Polynesia. The species is a zooxanthellate coral that grows on dead coral fragments and contributes to coral reef formation.
Scientists have developed a new procedure to rapidly induce nerve regeneration, restoring partial function within days and full function within two to four weeks. The approach mimics the cellular mechanism used by invertebrates to repair damaged nerve axons.
Caltech researchers have designed jellyfish-inspired pumps that utilize flexible designs and adaptable tissue composition to create efficient fluid transport systems. The pumps are optimized for medical applications, such as delivering medication or removing excess fluids from the body, without causing damage to surrounding tissues.
Research by ecologists at Brown University found that faster water flow speeds promote greater diversity of invertebrate species on rocks under the ocean. The study showed consistent results across three regions, suggesting that water flow is a key factor in determining marine biodiversity.
Coral reefs are surprisingly noisy places with fish and invertebrates producing clicks and grunts that provide useful information about the state of the reef. Healthier reefs were found to be louder, with a clear association between overall noise level generated and the amount of living coral.
Researchers found that male African cichlid fish exhibit a fear response when fighting their own reflections, characterized by increased activity in the amygdala region of the brain. This discovery suggests that fish may have more complex cognitive abilities than previously thought.
Australian yabbies possess a remarkable capacity for facial recognition, studying found that they can identify and distinguish between individuals. This ability is comparable to that of humans and some vertebrates, but rare in invertebrate species.
Researchers discover sea animals can spontaneously clone themselves, providing new insight into chordate evolution. The larvae of echinoderms form an outgrowth that pinches off and grows into a second, normal-looking larva, a process that was previously unrecognized.