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61,005 resultsShowing papers similar to The impacts of some plant protection chemical OCPs on two crustacean species \(\textit{Daphnia magna}\) and \(\textit{Moina macrocopa}\)
ClearImpacts of microplastics and pesticides on Daphnia
Researchers investigated the combined and individual impacts of microplastics and pesticides on Daphnia magna, a model crustacean widely used in freshwater ecotoxicology, to assess how these co-occurring pollutants affect aquatic ecosystem health. The study examined survival, reproduction, and physiological responses in D. magna exposed to varying concentrations of both stressors under controlled conditions.
Insights into the mechanisms of within-species variation in sensitivity to chemicals: A case study using daphnids exposed to CMIT/MIT biocide
Researchers compared how two strains of the water flea Daphnia pulex responded to a common industrial biocide and found that differences in sensitivity between strains of the same species were as large as differences between separate species, with epigenetic modifications (chemical tags on DNA) playing a key role in determining toxicity outcomes.
Toxicological Effect of Polyethylene Microsphere on Brachionus Plicatilis and Daphnia Magna
This study examined the toxicity of polyethylene microspheres on two aquatic organisms — a marine rotifer and a freshwater crustacean — finding dose-dependent reductions in survival and reproduction. The results confirm that microplastic particles at environmentally relevant concentrations can harm the base of aquatic food chains.
Microplastics enhance Daphnia magna sensitivity to the pyrethroid insecticide deltamethrin: Effects on life history traits
Researchers tested whether polyethylene microplastics alter the toxicity of the pyrethroid insecticide deltamethrin to Daphnia magna and found that microplastic presence increased sensitivity to deltamethrin, reducing survival and reproductive output at concentrations that were not toxic without microplastics.
Physiological and metabolic alterations induced by commercial neonicotinoid formulations in Daphnia magna
This study tested the sublethal effects of two commercial neonicotinoid insecticide formulations on water fleas (Daphnia magna), finding that both altered metabolic processes and reduced reproductive output at environmentally relevant concentrations. Neonicotinoids are widely detected in surface waters and are a concern for non-target aquatic organisms. This paper is focused on pesticide toxicity rather than microplastics, but both are co-occurring stressors in aquatic environments.
Daphnia magna responses to fish kairomone and chlorpromazine exposures
Researchers exposed the freshwater crustacean Daphnia magna to predator chemical cues (fish kairomones) and the neuroactive pharmaceutical chlorpromazine, finding that predator cues dominated behavioral and reproductive responses while the drug combination altered oxygen consumption, raising concerns about pharmaceutical interference with antipredator adaptations.
Toxicity of Military Chemical Sulfur Mustard on the Growth of Daphnia magna
Researchers found that sulfur mustard, a military chemical agent, is highly toxic to the freshwater crustacean Daphnia magna, with LC50 values of 0.020 ppm at 24 hours and 0.018 ppm at 48 hours, demonstrating its potential to severely disrupt aquatic ecosystems even at very low concentrations.
Effects of PET microplastics on the freshwater crustacean Daphnia similis Claus, 1976
Researchers investigated the effects of PET microplastics on the freshwater crustacean Daphnia similis, finding that high concentrations impaired survival and reproduction while sublethal levels altered antioxidant enzyme activity.
Impacts of Contaminants on Crustaceans in the Field
This review examines how inorganic and organic contaminants in field conditions affect crustacean populations, finding that real-world pollutant mixtures including microplastics, heavy metals, and pesticides compromise crustacean physiology and contribute to population declines.
Transgenerational Effects of Environmentally Relevant Concentrations of Atrazine and Glyphosate Herbicides, Isolated and in Mixture, to Freshwater Microcrustacean Daphnia Magna
This study tested the effects of atrazine and glyphosate herbicides — alone and in combination — on the water flea Daphnia magna and its offspring across generations. Both herbicides caused reproductive harm and the effects were passed to subsequent generations, with combined exposure being more toxic. Since herbicide-contaminated water also contains microplastics in many agricultural settings, these combined stressor effects are relevant to real-world aquatic risk assessment.
Toxic Effects of Ester Based Polymers on Daphnia Magna: a Laboratory Microcosm Study
Researchers assessed the acute and chronic toxicity of polycarbonate, PET, and polybutylene terephthalate microplastics on Daphnia magna, finding EC50 values of 2.6, 4.7, and greater than 100 mg/L respectively at 72 hours, with physiological effects observed even at low immobilization rates. The study demonstrates that ester-based polymer microplastics differ substantially in their toxicity to freshwater zooplankton.
Microplastics modify the toxicity of glyphosate on Daphnia magna
Daphnia magna were exposed to three glyphosate formulations combined with polyethylene microbeads or PET/PA fibers for one week, finding that microplastics altered (mostly reduced) the toxicity of glyphosate depending on formulation and plastic type. The study demonstrates that microplastics can modulate pesticide bioavailability and toxicity in freshwater crustaceans.
Effects of PVC pipe leachates on the survival and reproduction of two micro-crustacean species Ceriodaphnia Cornuta and Daphnia Magna
Researchers tested whether leachates from PVC water pipes affect the survival and reproduction of two micro-crustacean species, finding toxic effects at relevant concentrations. PVC pipes can leach harmful plastic additives including phthalates into drinking water and aquatic environments, compounding the pollution associated with microplastics.
Long Term Exposure to Virgin and Recycled LDPE Microplastics Induced Minor Effects in the Freshwater and Terrestrial Crustaceans Daphnia magna and Porcellio scaber
Long-term exposure studies of freshwater and terrestrial crustaceans to virgin and recycled LDPE microplastics found only minor effects on survival, reproduction, and immune response, suggesting that LDPE at tested concentrations poses limited chronic hazard to these species.
Combined Toxicity of Glyphosate (Faena®) and Copper to the American Cladoceran Daphnia exilis—A Two-Generation Analysis
The North American cladoceran Daphnia exilis was exposed to mixtures of glyphosate herbicide and copper over two generations, with LC50 values of 4.22 mg/L and 13.45 microg/L respectively, and combined sublethal exposures reducing fecundity, clutch size, and neonate size across both parental and filial generations.
The effect of microplastics and co-occurring toxicants on survival and life-history traits of the cladoceran Moina macrocopa
Researchers tested the effects of four types of microplastics on the freshwater cladoceran Moina macrocopa, both alone and in combination with copper, insecticides, and diesel fuel. The study found that only polystyrene-based microplastics induced direct toxicity, while other polymer types modulated the toxicity of co-occurring chemical contaminants in varying ways.
Microplastic contamination worsens the ecotoxicity of chlorpyrifos to cladoceran Ceriodaphnia cornuta (Sars, 1885) and Echinisca triserialis (Brady, 1886)
Researchers found that microplastics worsen the toxic effects of the pesticide chlorpyrifos on two species of tiny freshwater crustaceans (cladocerans). When microplastics pre-loaded with chlorpyrifos were present, the combined exposure caused greater harm than either pollutant alone, reducing reproduction and survival rates. The study suggests that microplastics in agricultural waterways can act as carriers for pesticides, amplifying ecological risks to aquatic organisms.
Acute sensitivity of three Cladoceran species to different types of microplastics in combination with thermal stress
This study tested the acute sensitivity of three Cladoceran water flea species to different types of microplastics, finding species-specific differences in toxicity responses and identifying particle type and shape as key factors driving toxicity.
Heart rate and behavioral responses in three phylogenetically distant aquatic model organisms exposed to environmental concentrations of carbaryl and fenitrothion
Researchers exposed zebrafish, Japanese medaka, and water fleas (Daphnia magna) to very low concentrations of two common insecticides — carbaryl and fenitrothion — that are considered "safe" by current standards. Despite being below established safety thresholds, both chemicals increased heart rate and disrupted normal swimming behavior across all three species, raising concerns that current safety standards may underestimate real-world risks to aquatic life.
Effects of Microplastic Concentrations on the Survivability and Reproduction of Moina Macrocopa
Polystyrene microplastics at varying concentrations were tested for their effects on the survival and reproduction of Moina macrocopa, a small freshwater crustacean used in toxicity testing. Higher microplastic concentrations reduced survival and reproduction, indicating ecotoxicological risks for zooplankton in contaminated freshwater.
Emerging trends in nanoparticle toxicity and the significance of using Daphnia as a model organism
Researchers reviewed why the freshwater crustacean Daphnia is a valuable model organism for nanoparticle toxicity testing, summarizing how nanoparticle size, charge, and surface chemistry influence toxicity in Daphnia and highlighting key knowledge gaps in nanoplastic environmental risk assessment.
Combined effect of polystyrene nanoparticles and chlorpyrifos to Daphnia magna
This study examined the combined effects of polystyrene nanoparticles and chlorpyrifos pesticide on Daphnia magna, a standard aquatic toxicity test organism. The two contaminants together caused greater mortality and reproductive impairment than either alone, suggesting synergistic toxicity.
Effects of combined nutrient and pesticide exposure on algal biomass and Daphnia magna abundance
Researchers investigated the individual and combined effects of nutrients and pesticides on Daphnia magna abundance and algal biomass under controlled conditions, examining how agricultural inputs — fertilizers driving eutrophication and pesticides causing direct toxicity — interact to affect freshwater biodiversity.
Sublethal Effects of Organophosphate Chlorpyrifos on Hemato-Immunological Parameters of the Gercacinid Crab, Cardiosoma armatum (Herklots, 1851)
Researchers exposed the land crab Cardiosoma armatum to low concentrations of the pesticide chlorpyrifos for 28 days, finding significant suppression of immune function and alterations in blood chemistry at sublethal levels. While focused on pesticide toxicity, the study demonstrates how chemical pollutants—including those that adsorb onto microplastics—can harm crustaceans even at low concentrations.