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61,005 resultsShowing papers similar to Accumulation, depuration, and potential effects of environmentally representative microplastics towards Daphnia magna
ClearImpacts of polystyrene microplastics on Daphnia magna: A laboratory and a mesocosm study
Laboratory tests and mesocosm experiments with Daphnia magna and polystyrene microplastics found that effects at high concentrations were more related to food dilution than direct toxicity, and population-level effects in mesocosms were minimal. The study emphasizes the importance of using realistic concentrations and multi-species systems to assess microplastic risks.
Screening study of four environmentally relevant microplastic pollutants: Uptake and effects on Daphnia magna and Artemia franciscana
Researchers exposed Daphnia water fleas and brine shrimp to four real-world microplastic types from consumer products, finding that smaller particles were ingested more readily by daphnids, that gut accumulation depended on particle size, and that while no acute lethality occurred, brine shrimp growth was impaired.
Effects of microplastics and natural particles on the aquatic invertebrate Daphnia magna under different dietary quality scenarios
Researchers exposed Daphnia magna to both natural particles—including sediment, algae, and biofilm—and polystyrene microplastics to compare their effects, finding that natural particles caused similar or greater harm than microplastics at equivalent concentrations, highlighting the need for environmental context in MP toxicity studies.
Ecotoxicology of microplastics in Daphnia: A review focusing on microplastic properties and multiscale attributes of Daphnia
This review synthesizes research on how microplastics affect Daphnia, a key organism in aquatic food webs, across individual, population, and community levels. Researchers found that the toxicity of microplastics to Daphnia depends heavily on the physical and chemical properties of the particles, and that combined exposure with other pollutants can produce more severe effects. The study highlights Daphnia as an important indicator species for understanding how microplastic pollution cascades through aquatic ecosystems.
Significant decline of Daphnia magna population biomass due to microplastic exposure
Stable Daphnia magna populations were exposed to primary microplastics (1–5 μm) at concentrations ranging from 10⁴ to 10⁷ particles/mL for three weeks, resulting in a significant decline in population biomass at higher concentrations. The study demonstrates that population-level endpoints reveal microplastic effects that are missed by single-organism toxicity tests, highlighting the need for realistic long-term exposure experiments.
The Effects of Natural and Anthropogenic Microparticles on Individual Fitness in Daphnia magna
Researchers compared the effects of natural and anthropogenic microparticles on the fitness of the water flea Daphnia magna. The study found that both primary microplastics from cosmetic products and secondary microplastics from degraded plastic waste can have detrimental effects on zooplankton feeding and fitness, with particle shape and weathering influencing toxicity.
The complexity of micro- and nanoplastic research in the genus Daphnia – A systematic review of study variability and a meta-analysis of immobilization rates
This meta-analysis examines how micro- and nanoplastics affect Daphnia, a tiny water creature widely used to test the toxicity of pollutants. The research found that plastics can harm Daphnia survival and reproduction, which matters because these organisms are at the base of freshwater food chains that ultimately connect to human water and food sources.
Short-term exposure with high concentrations of pristine microplastic particles leads to immobilisation of Daphnia magna
Researchers tested the effects of high concentrations of pristine microplastic particles on the water flea Daphnia magna. The study found that short-term exposure to high microplastic concentrations led to immobilisation, and that different polymer types, sizes, and shapes produced varying levels of toxicity, highlighting the importance of particle characteristics in microplastic risk assessment.
Effects of Microplastics on Reproduction and Growth of Freshwater Live Feeds Daphnia magna
Researchers found that microplastic exposure negatively affected reproduction and juvenile growth in Daphnia magna, a key freshwater zooplankton species, with effects worsening at higher concentrations and posing risks for aquatic food chains.
Difference in sensitivity of Daphnia magna to pristine and aged microplastic fibers
Researchers compared the sensitivity of Daphnia magna to pristine versus aged microplastic fibers, which make up a large proportion of environmental plastic pollution. Aged fibers showed different toxicity profiles than pristine fibers, highlighting the need to use environmentally weathered particles in ecotoxicology tests.
Review on the ecotoxicological impacts of plastic pollution on the freshwater invertebrate Daphnia
This review examines the ecotoxicological impacts of plastic pollution on the freshwater invertebrate Daphnia, a widely used model organism. Researchers highlight that microplastics affect Daphnia reproduction, growth, and survival, and that chemicals leaching from plastics may contribute additional toxic effects that transfer through food webs.
Ingestion of micro- and nanoplastics in Daphnia magna – Quantification of body burdens and assessment of feeding rates and reproduction
Researchers used a quantitative approach to measure how the water flea Daphnia magna ingests and excretes micro- and nanoplastic particles of different sizes. They found that larger 2-micrometer particles were ingested in greater mass than 100-nanometer particles, and that complete excretion did not occur within 24 hours. Chronic exposure reduced feeding rates and reproduction, suggesting that ongoing microplastic exposure could have meaningful ecological consequences for these important freshwater organisms.
Microplastic-mediated transport of PCBs? A depuration study with Daphnia magna
This study used the water flea Daphnia magna to investigate whether microplastics can affect how persistent organic pollutants like PCBs are eliminated from aquatic organisms. The experiment found that microplastics could act as a vehicle for contaminant transport, supporting the concern that they change how organisms are exposed to legacy pollutants.
Effects of microplastics mixed with natural particles on Daphnia magna populations
Researchers exposed populations of the freshwater organism Daphnia magna to polystyrene microplastics mixed with natural particles over 50 days and found significant population-level declines. Population sizes dropped by 28 to 42 percent compared to controls, with changes in population structure and stress-induced resting egg production. The study demonstrates that microplastics cause harmful effects at the population level, not just in individual organisms.
Effects of chronic exposure to environmentally realistic microplastics on Daphnia magna: importance of particle size and morphology and implications for risk assessments
Scientists tested how tiny plastic particles from everyday items like nylon fibers and polystyrene cups affect small water creatures called Daphnia over 21 days. They found that these microplastics get eaten by the creatures and can harm their ability to reproduce and grow, especially the fiber-shaped plastics. This matters because it shows how plastic pollution in water can damage aquatic life, and since microplastics are also found in our drinking water and food, understanding these effects helps us better assess potential risks to human health.
Assessment of intake and effect of microplastics and its combination with metals in experimental (Daphnia magna) and environmental conditions (freshwater fish)
Researchers assessed the intake and effects of microplastics and their combination with metals using Daphnia magna as an experimental model and freshwater fish under environmental conditions, investigating how microplastics adsorb and transport harmful metals in freshwater systems.
Selective ingestion and response by Daphnia magna to environmental challenges of microplastics
Researchers used fluorescent microplastics labeled with aggregation-induced emission markers to investigate how Daphnia magna selectively ingests different types of plastic particles, finding that particle type, size, and surface chemistry influence ingestion patterns and toxicological response.
Microplastic-mediated transport of PCBs? A depuration study with Daphnia magna
Researchers tested whether microplastics could help remove PCBs from the water flea Daphnia magna, finding that only one PCB congener was cleared more efficiently with microplastic exposure while most others were unaffected. The study suggests microplastics have limited value as a depuration tool for PCB-contaminated zooplankton under environmentally relevant conditions.
Effects of microplastics mixed with natural particles on Daphnia magna populations
Researchers exposed Daphnia magna populations to irregular polystyrene microplastics mixed with diatomite as a natural particle at fixed concentrations over 50 days, measuring effects on population size, structure, and individual-level endpoints. The study validated population-level predictions from short-term individual exposures and assessed how natural particles modulate microplastic toxicity in freshwater zooplankton.
Impacts to Larval Fathead Minnows Vary between Preconsumer and Environmental Microplastics
Researchers found that impacts on larval fathead minnows differed significantly between preconsumer laboratory microplastics and environmentally collected microplastics, demonstrating that studies using commercially purchased uniform microplastics may not accurately predict real-world effects of the heterogeneous mixture found in nature.
Exposure medium and particle ageing moderate the toxicological effects of nanomaterials to Daphnia magna over multiple generations: a case for standard test review?
This study found that the toxicological effects of engineered nanomaterials on Daphnia magna varied depending on the exposure medium and whether particles had been environmentally aged, with aged particles behaving differently from pristine ones across multiple generations. The findings suggest that standard ecotoxicology test protocols designed for pristine particles may not accurately reflect real-world risks from weathered nanoplastics and nanomaterials.
Assessing the ecological consequences of biodegradable plastics: Acute, chronic and multigenerational impacts of poly-3-hydroxybutyrate microplastics on freshwater invertebrate Daphnia magna
Researchers tested the effects of microplastics made from PHB, a biodegradable plastic, on the freshwater organism Daphnia magna across multiple generations. Even biodegradable microplastics impaired reproduction, growth, and survival, with effects worsening over successive generations. This study shows that replacing conventional plastics with biodegradable alternatives does not eliminate the microplastic problem, since biodegradable plastics can still produce harmful micro-sized particles.
Is the development of Daphnia magna neonates affected by short-term exposure to polyethylene microplastics?
Daphnia magna neonates ingested polyethylene microplastics within the first 24 hours of exposure but showed no significant effects on mobility or molting, though food availability was a more powerful driver of development than microplastic concentration. The study highlights the importance of accounting for feeding regime when interpreting microplastic toxicity tests.
The complexity of micro-and nanoplastic research in the genus Daphnia – A systematic review of study variability and meta-analysis of immobilization rates
This meta-analysis pools data from multiple studies to assess how micro and nanoplastic particles affect Daphnia, tiny water creatures commonly used to test environmental toxicity. The findings help establish baseline toxicity levels for plastic particles in freshwater, which is important for setting safety standards that ultimately protect human drinking water sources.