Two papers advance understanding of PFOS effects on aquatic life, particularly fish, by testing multiple concentrations and confirming its presence in water. The results indicate that earlier findings were non-repeatable and likely due to biological variation rather than PFOS toxicity.
Researchers analyzed PFAS levels in fish food and organisms used in aquatic laboratory experiments. They found significant contamination across different types of food and aquaculture practices, recommending pre-testing for all feeds and organisms.
The Society of Environmental Toxicology and Chemistry Europe hosts its 31st annual meeting, discussing pressing environmental topics such as climate change, microplastics, and biodiversity. The four-day conference will showcase over 1,200 presentations across 72 topics, including keynote addresses from prominent scientists.
Research published in Environmental Toxicology and Chemistry shows a sustained 3.8% annual decline in PBDE concentrations in bald eagle nestlings' blood samples across Minnesota and Wisconsin. The findings are instructive for regulators to set protective levels for wildlife and fish consumption advisories for humans.
PFAS substances are ubiquitous in the environment, found in soil, water, and wildlife. Research highlights the need for effective management strategies to mitigate potential toxicity to humans and wildlife, with data gaps identified for devising an approach.
Recent studies suggest organic UV filters in sunscreens may harm coral reefs, but evidence is limited and inconclusive. Researchers recommend further field and lab studies to assess environmental risk and develop a coral environment risk assessment framework.
Excessive use of pharmaceuticals and pesticides in industrial meat production facilities affects water quality and air pollution. Aerial transport of agrochemicals from feed yards contributes to environmental degradation, posing risks to humans and wildlife.
Researchers developed a simple and inexpensive technique to assess genetic toxicity in bats, highlighting the need for monitoring wildlife health due to declining biodiversity. The study found higher levels of micronuclei frequency in bats roosting near agricultural lands.
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.
A study published in Environmental Toxicology and Chemistry has identified coal-tar-sealant as the primary source of polycyclic aromatic hydrocarbons (PAHs) in Great Lakes tributaries. The research highlights the need for further analysis to determine the potential effects of PAHs on aquatic life in these areas.
Researchers describe the current state of metal toxicity modeling and science-based best practices for water chemistry. The latest models support improved ecosystem protection, but outdated regulations remain a concern.
A study in Environmental Toxicology and Chemistry reveals that coal-burning activities in the Asia-Pacific region have contaminated sediment layers in the US Pacific Northwest, with mercury deposition increasing by 400-fold. Global cooperation is essential to mitigate these environmental consequences.
Research reveals that dung beetles are sensitive to livestock management chemicals, affecting their growth and development. This can lead to reduced ecosystem services, including nutrient redistribution and pest control, ultimately impacting agriculture and the environment.
A new study found that naproxen's degradation products are up to 15 times more toxic to southern toad larvae than the medication itself. Researchers emphasized the importance of considering the full life cycle of medications when evaluating their environmental impact.
Recent studies reveal that pesticide adjuvants, commonly added to plant protection products, can be toxic to honey bees. Adjuvants increase mortality rates, reduce colony size, and impair brooding when co-applied with neonicotinoids, highlighting the need for environmental safety assessments.
The investigation highlights a previously unidentified risk of drench application for imidacloprid. The authors recommend minimizing exposure to animals consuming fallen seeds and encouraging integrated pest management instead.
Exposure to neonicotinoids as tadpoles impairs wood frogs' ability to flee from predators, with affected individuals jumping or moving less. However, physical abilities like distance jumped and refuge finding remain unaffected.
A study published in Environmental Toxicology and Chemistry found that PFAS can inhibit a mussel's immune system, but the effects are reversible. The research highlights the importance of monitoring regions with high environmental concentrations of PFAS.
A study using American dippers found that run-of-river dams can cause a spike in methylmercury levels due to reservoir formation and temperature increases. However, no significant differences were observed between regulated and unregulated streams in terms of mercury levels.
A recent study found that nano-copper azole combinations cause significant harm to estuarine benthic communities. The research highlights the need for better understanding of nanomaterial stress on these ecosystems.
A study found that atrazine exposure increases feminization in male Blanchard's cricket frogs, altering their sex ratio. The species is highly sensitive to atrazine, which disrupts gonadal development and impacts ecological trajectories.
The publication marks a significant milestone in aquatic toxicology with the release of the first generation of annotations for the fathead minnow genome. The data will enhance the utility of this species for ecotoxicology research and open up new avenues for studying its effects on ecosystems.
A recent study found that pyrethroid pesticides can persist in homes for up to a year, with 70% of one common ingredient still present in dust after a year. This persistence increases the risk of exposure for young children and household pets who spend more time on surfaces where the pesticides are present.
A study predicts areas of plastic input and deposition based on global climate change and ocean circulation. Microplastics interact with marine species in various habitats, and changing sea surface temperatures affect precipitation patterns.
Experts recommend using risk assessment to regulate endocrine disrupting substances, considering exposure and effects on sensitive species. Hazard assessments are suitable in absence of sufficient data.
PFASs found in hooded seal mothers' plasma and milk, with concentrations higher than those in other species. This exposure can lead to reduced birth weight and developmental effects, threatening the survival of young seals.
Recent studies have shown variable levels of radioactive contamination in fish, but population-level effects have not been observed. The long-term fate of the contamination remains unknown, with further research needed to understand its effects on marine ecosystems.
Research highlights widespread plastic contamination in oceans, with effects on marine life and human health, prompting policy changes such as bans on microplastics and single-use plastics.
David W. Schindler, renowned limnologist, receives the SETAC Rachel Carson Award for his work on laundry detergent phosphates and eutrophication. His research has led to policy changes worldwide.
Harmful algal blooms are becoming a major threat to inland water quality, with increasing frequency and severity due to climate change and nutrient enrichment. Inland surface waters lack formal monitoring programs, hindering efforts to protect aquatic ecosystems and human health.
A national survey of US surface waters found pharmaceuticals in high levels near urban areas, posing risks to aquatic organisms. Research on complex mixtures of pharmaceuticals reveals inconsistent responses across different life stages, highlighting the need for diverse biological endpoints.
A recent USGS and Baylor University study examines the bioaccumulation of pharmaceuticals in the water-fish-osprey food web. The research findings indicate that ospreys do not carry significant amounts of human pharmaceutical chemicals, despite widespread occurrence of these chemicals in water.
A recent study by the Society of Environmental Toxicology and Chemistry identified key knowledge gaps in understanding pharmaceutical and personal care product (PPCP) impacts on ecosystems and human health. The priority areas include research on human health exposure, as well as regional testing methods for measuring PPCPs in the envir...
The study found that fipronil and imidacloprid inhibit mitochondrial bioenergetics in honeybees, leading to depleted cell energy and impaired flight muscles. This effect can contribute to the inability of bees to forage and return to their hives.
Scientists have identified issues with standard toxicity testing data used to inform dispersant decisions, highlighting the need for more accurate and comparable data. The current practices do not adequately replicate field conditions, such as sea state and weather, or consider exposure durations and concentrations.
Three commonly used pesticides were found to be toxic to honeybees, even at sublethal doses. These pesticides modulated key enzymes that regulate physiological processes, affecting cognitive capacities and immune responses in bees.