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
Stephanie A. Maggio, Philip K. Janney, Jeffrey J. Jenkins
Summary: Chlorpyrifos (CPF) and its metabolic product chlorpyrifos-oxon (CPFO) both exhibit neurotoxic effects, with CPFO being more acutely toxic to Daphnia magna. However, neither compound showed effects on reproduction or growth in chronic exposures to D. magna.
Article
Biology
D. P. Karabanov, E. Bekker, A. A. Kotov
Summary: This study focused on the consequences of underestimating the effects of biological invasions on phylogeographic analysis, and proposed an algorithm for identifying adventive sequences in order to mitigate contamination of haplotypes.
Article
Environmental Sciences
Reka Svigruha, Istvan Fodor, Janos Gyori, Janos Schmidt, Judit Padisak, Zsolt Pirger
Summary: This study investigated the effects of progestogens in mixtures at environmentally relevant concentrations on Daphnia magna for the first time, finding significant impacts on molecular, cellular, and individual levels in both short-term and long-term exposures, including increased gene expression and activity of GST detoxification enzyme, as well as changes in reproductive capacity. Future research should focus on understanding the potential mechanisms underlying these effects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biodiversity Conservation
Cristian Alberto Espinosa-Rodriguez, Marco Antonio Jimenez-Santos, Diana Meztli Martinez-Miranda, Elias Piedra-Ibarra, Ligia Rivera-De la Parra, Alfonso Lugo-Vazquez
Summary: The species of Daphnia (Ctenodaphnia) magna, commonly used in ecotoxicological tests, has been documented for the first time in the waterbodies of the Mexican protected area and RAMSAR site Cienegas del Lerma. The study used morphological traits and cytochrome oxidase I as a molecular marker to confirm the identity of the species. It was found that the individuals analyzed are related to strains from Europe, and their sequences differ from natural populations in the United States and Canada. The potential spread of D. magna to other waterbodies in the area and its potential adverse effects on local Daphnia species should be carefully considered.
BIOLOGICAL INVASIONS
(2023)
Article
Environmental Sciences
David Ferreira, Gilberto Dias de Alkimin, Bruna Neves, Tiago Conde, M. Rosario Domingues, Bruno Nunes
Summary: The antifungal clotrimazole (CLO) has toxic effects on the growth, feeding, and reproduction of D. magna, but it is unclear whether these effects are due to the inhibition of specific cytochrome P450 enzymes or are caused by general toxic stress and decreased nutrition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Fisheries
Chih-Hsiung Huang, Tah-Wei Chu, Chiu-Hui Kuo, Ming-Chang Hong, Yu-Yun Chen, Bonien Chen
Summary: In recent years, research has focused on the damage caused by microplastics to the environment and human health. Microplastics are consumed by marine organisms, affecting their reproductive systems and the ecosystem as a whole.
Article
Evolutionary Biology
Eddie K. H. Ho, Sarah Schaack
Summary: The study found that mutation rates causing structural variation vary significantly among populations and are uncorrelated across different types of mutations. This challenges prevailing theories explaining the evolution of mutation rates and highlights the importance of obtaining additional mutation rate estimates in a wider range of genotypes and species.
GENOME BIOLOGY AND EVOLUTION
(2021)
Article
Evolutionary Biology
Eddie K. H. Ho, Sarah Schaack
Summary: The study found that mutation rates causing structural variation vary greatly among populations, are not correlated across different types of mutations, and do not occur in genic regions as expected.
GENOME BIOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
Hiroyuki Mano, Naohide Shinohara, Adam Peters, Emily Garman, Ellie Middleton, Chris Schlekat, Wataru Naito
Summary: This study evaluated the accuracy and bias of existing nickel bioavailability models in predicting chronic toxicity in Japanese river waters. The results showed that water chemistry differences among Japanese river waters influenced the chronic toxicity of nickel, and calibrating the models in Japanese natural waters increased their predictive capacity by up to approximately five times.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Dmitry P. Karabanov, Petr G. Garibian, Eugeniya I. Bekker, Rimma Z. Sabitova, Alexey A. Kotov
Summary: Studies have identified a population in the Volga basin that contains hybrids of D. curvirostris and D. korovchinskyi, with the exact hybrid system still unknown and requiring further investigation. This discovery highlights the importance of accurate studies in revealing cryptic interspecific invasions, with expectations for rapid growth in the number of revealed cases in the future.
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
Ecology
Xinrong Wei, Xiao Li, Hongsong Liu, Haojun Lei, Weijun Sun, Dan Li, Wu Dong, Hongxing Chen, Lingtian Xie
Summary: Cadmium exposure in Daphnia magna led to increased body burden of Cd, decreased body length and weight, reduced heart rate and thoracic limb activity, disrupted oxidative stress and antioxidant system, impaired reproductive capacity, and altered gene expression related to molting and reproduction.
Article
Environmental Sciences
Yunfei Sun, Qi Liu, Jing Huang, Da Li, Yuan Huang, Kai Lyu, Zhou Yang
Summary: This study investigated the combined effects of food abundance and zinc oxide (ZnO) nanoparticles concentration on the development and reproductive performance of Daphnia magna. The results showed that high levels of ZnO nanoparticles and low abundance of algae had a negative effect on the life history of D. magna. Higher abundance of algae reduced the negative effect of ZnO nanoparticles, but the negative effect could not be eliminated. The findings highlight the importance of considering food abundance when evaluating the impact of pollutants on zooplankton.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Biochemistry & Molecular Biology
Yang Liu, Jiale Zhang, Haoyang Zhao, Ji Cai, Yousef Sultan, Haiyan Fang, Bangjun Zhang, Junguo Ma
Summary: The drastic increase of microplastics in aquatic environment is a serious threat to marine and freshwater ecosystems. This study investigated the potential harmful effects of polyvinyl chloride microplastics on aquatic organisms. The results showed that chronic exposure to PVC-MPs affected reproduction parameters, oxidative stress, and gene expression in Daphnia magna, suggesting that PVC-MPs in aquatic environment may cause reproduction toxicity.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2022)