Article
Environmental Sciences
Mengting Li, Vera Slaveykova
Summary: This study investigated the influence of titanium dioxide nanoparticles (nTiO(2)) on the accumulation and transfer of inorganic and monomethyl mercury in invertebrate Daphnia magna. The results showed that nTiO(2) led to a decrease in total mercury body burden in D. magna exposed through waterborne exposure, but an increase when exposed through nTiO(2) pre-treated with mercury. The presence of nTiO(2) also decreased the total mercury in D. magna when exposed through algal food. Additionally, high concentrations of nTiO(2) favored trophic transfer of mercury through feeding on nTiO(2) pre-treated with mercury. The results provide insights into the role of nTiO(2) in the bioavailability and trophic transfer of mercury in the aquatic environment.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
An Xuehua, Lui Xinju, Jiang Jinhua, Wang Feidi, Lv Lu, Li Gang, Wu Shenggan, Zhao Xueping
Summary: This study assessed the toxic effects of the broad-spectrum triazole fungicide prothioconazole (PTC) and its metabolite prothioconazole-desthio (PTCd) on Daphnia magna. The results showed that both PTC and PTCd had adverse effects on the growth and reproduction of D. magna, with PTC being more toxic than PTCd. Therefore, the environmental risks of these metabolites should not be ignored.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Joyce Ribeiro Santos-Rasera, Regina Teresa Rosim Monteiro, Hudson Wallace Pereira de Carvalho
Summary: This study investigated the uptake, acute toxicity, and depuration of ZnO nanoparticles using the model fresh water organism Daphnia magna. The results showed that the toxicity of the nanoparticles depended on their size and the presence of surfactant. Contrary to previous reports, the study did not detect any depuration of ZnO nanoparticles after exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Andrew H. Nagel, Chad W. Cuss, Greg G. Goss, William Shotyk, Chris N. Glover
Summary: Limited chronic toxicity data exists regarding the trace element thallium's impact on aquatic biota, hindering the establishment of water quality criteria for this metal. Daphnia magna showed lower sensitivity to thallium under controlled laboratory conditions compared to the current Canadian regulatory guideline value.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Sevgi Basalan Over, Celal Guven, Eylem Taskin, Arif Cakmak, Petek Piner Benli, Yusuf Sevgiler
Summary: The study found that ammonia and TBM induced acute and chronic toxicity effects on D. magna, leading to an energy crisis in the organism. Traditional biomarkers like GST and ChE were not sensitive in detecting these effects, while AMPK and MMP show promise as biomarkers for these toxicants.
ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2021)
Article
Environmental Sciences
Xiang Wan, Chen Cheng, Yurong Gu, Xiubo Shu, Liqiang Xie, Yanyan Zhao
Summary: The study investigated the single and mixture toxic effects of MC-LR and Phe mixtures on aquatic organisms, with results showing that the mixture toxicity was concentration-dependent and exhibited synergistic effects at low concentrations. The protective effects of high concentrations of MC-LR may lead to antagonistic effects. Furthermore, exposure to low concentrations of the mixture had a greater toxic effect on D. magna than either chemical alone.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Kristin A. Connors, Jessica L. Brill, Teresa Norberg-King, Mace G. Barron, Greg Carr, Scott E. Belanger
Summary: The study found no significant differences in acute or chronic sensitivity between D. magna and C. dubia in standard toxicity tests. The variability in acute D. magna and C. dubia regressions was similar to that in D. magna and D. pulex regressions. Slope and y-intercept values were also comparable.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2022)
Article
Engineering, Environmental
Aaron Boyd, Ivy Luu, Devang Mehta, Sunil P. Myers, Connor B. Stewart, Karthik R. Shivakumar, Katherine N. Snihur, Daniel S. Alessi, Maria Camila Rodriguez Gallo, Heather Veilleux, Marin E. Wiltse, Thomas Borch, R. Glen Uhrig, Tamzin A. Blewett
Summary: Hydraulic fracturing uses water and proppants to extract oil and gas, but the resulting wastewater, called flowback and produced water (FPW), contains toxic compounds. Previous research has shown the toxicity of FPW to Daphnia magna (D. magna). This study found that D. magna was unable to recover from a 48-hour exposure to FPW, and the toxicity persisted for at least 19 days post-exposure. The study highlights the importance of considering long-term effects of FPW remediation in spill scenarios.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Simona Mondellini, Matthias Schott, Martin G. J. Loder, Seema Agarwal, Andreas Greiner, Christian Laforsch
Summary: This study found that exposure to water soluble synthetic polymers can cause life history changes and altered levels of reactive oxygen species in the freshwater key species D. magna, although acute mortality was not observed. These sublethal effects may result in cascading effects that can impact the entire food web.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Peng Wang, Qin-Qin Li, Jin Hui, Qian-Qian Xiang, Hui Yan, Li-Qiang Chen
Summary: The study showed that exposure to MPs-20 and MPs-30 resulted in significant accumulation of microplastics in the gut of D. magna, decreased survival and heart rate. Metabolomics analysis revealed that both MPs-20 and MPs-30 induced significant changes in numerous metabolites in D. magna.
Article
Environmental Sciences
Didem Gokce, Merve Duygu Seftalicioglu, Busra Aksoy Erden, Suleyman Koytepe
Summary: This study evaluated the chronic and acute effects of water-soluble microplastics PVA and PMA on the growth and reproduction of Daphnia magna. Different concentrations of microplastics polymers were found to affect population density, reproductive data, lifespan, and reproductive strategies of D. magna, leading to adverse effects on their survival and reproduction.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Environmental Sciences
Qingzhu Jia, Junli Wang, Fangyou Yan, Qiang Wang
Summary: A quantitative structure-toxicity relationship (QSTR) model based on norm descriptors was established in this study to predict the toxicity of pesticides to Daphnia magna. The model showed good predictability, stability, and reliability, indicating that norm descriptors might be universally applicable in describing the relationship between the toxicity and structures of pesticide compounds.
Article
Biochemistry & Molecular Biology
Andras Acs, Andras Komaromy, Attila W. Kovacs, Istvan Fodor, David Somogyvari, Janos Gyori, Anna Farkas
Summary: This study investigated the potential for elevated temperature to alter the toxicity of acetamiprid (ACE) and thiacloprid (Thia) in the ecotoxicity model Daphnia magna. The results showed that the elevated temperature suppressed the metabolism of neonicotinoids and impaired membrane transport activity in daphnids. Additionally, the reproductive performance of daphnids was significantly worsened following neonicotinoid exposures at elevated temperatures.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2023)
Article
Environmental Sciences
Anna Michalaki, Konstantinos Grintzalis
Summary: This study assessed the impact of two commonly prescribed non-steroidal anti-inflammatory drugs on Daphnia magna, a species commonly found in freshwater ecosystems. It found that exposure to these drugs affected feeding behavior and key enzyme activities in the daphnids, and the effects were more pronounced in the transgenerational exposures. The study suggests that combining molecular and phenotypic markers of physiology in transgenerational studies is an effective way to understand the impact of pharmaceutical stressors.
Article
Ecology
A. Linares Campos, L. Morales Lara, M. L. Cedillo Ramirez, Y. A. Linares Gonzalez, L. B. Rivera Rodriguez, R. D. Pena Moreno, M. T. Flores Sotelo, G. Linares Fleites, L. A. Paniagua Solar, J. S. Hernandez Zepeda
Summary: This study analyzed the acute and chronic toxicity of waste tire ash on Daphnia magna. The acute test showed an EC50 of 5.83 g/L after a 48-hour exposure. The chronic test revealed a decrease in total reproduction over 19 days in all treatments.
APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
(2022)