Article
Environmental Sciences
Beatriz Salesa, Javier Torres-Gavila, Encarnacion Sancho, Maria Dolores Ferrando
Summary: In this study, the ecotoxicological effects of Pyriproxifen, an insecticide, on the crustacean Daphnia magna were evaluated. Acute toxicity tests, feeding behavior tests, and chronic toxicity tests were conducted on the parental daphnid generation (F0). The results showed that exposure to Pyriproxifen led to a decrease in reproductive parameters and population growth rate in the F0 generation, while the survival rate remained unaffected. Offspring from the F0 generation also exhibited abnormalities in morphology and a decrease in reproductive parameters. Additionally, the appearance of males among the F0 offspring was observed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yang Huang, Hongye Yao, Xuehua Li, Fei Li, Xiaoqing Wang, Zhiqiang Fu, Ningjing Li, Jingwen Chen
Summary: The molecular mechanisms of chronic aquatic toxicity induced by different surface functional groups of graphene nanomaterials are studied using RNA sequencing. Unfunctionalized graphene (u-G) causes potential oxidative stress in Daphnia magna by altering ferritin transcription levels in the mineral absorption signaling pathway. Functionalized graphenes, including carboxylated graphene (G-COOH), aminated graphene (G-NH2), hydroxylated graphene (G-OH), and thiolated graphene (G-SH), have toxic effects on Daphnia magna through various metabolic pathways. The findings provide important insights into the safety assessment of graphene nanomaterials.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
Imtiaz Ahmed, Bo Zhang, Muhammad Muneeb-Ur-Rehman, Wenhong Fan
Summary: This study investigated the effects of different shapes of nano-Cu2O on Daphnia Magna, finding that octahedron shape had a more toxic effect compared to cubic shape for both generations. Additionally, humic acid showed a significant reduction in the toxicity of nano-Cu2O, leading to enhanced survival rate and body length of the organisms.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(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
Cristian Gomez-Canela, Ferran Esquius, Carlos Barata
Summary: The role of serotonin in the phototactic and locomotor behavior of Daphnia magna was examined through genetic and pharmacological approaches. The study found that animals lacking serotonin exhibited increased negative phototaxis and locomotor activity, as well as reduced responses to fish kairomones. Exogenous serotonin restored the phototactic and locomotor behavior of individuals lacking serotonin, but had no effect on the response to fish kairomones. Surprisingly, fluoxetine altered locomotor activity and phototactic behavior in serotonin-deficient individuals, and also increased acethylcholine and GABA concentrations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
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
Anna Olkova
Summary: The study aimed to identify conditional reference demographic indicators of Daphnia magna populations for bioassays. It was found that groups with a density of 25 individuals/dm(3) exhibited the best demographic characteristics, but maintenance conditions and nitrate concentration in the cultivation water were crucial factors affecting the state of the populations. Regular monitoring of demographic characteristics can enhance the accuracy of bioassay results.
Article
Environmental Sciences
Zihang Wang, Yixiang Wang, Shanshan Qin, Zhou Yang, Yunfei Sun
Summary: Polystyrene microplastics are found widely in freshwater ecosystems and have significant impacts on freshwater organisms. Stable interspecific relationships play a crucial role in maintaining the health of aquatic ecosystems. This study investigated the effects of polystyrene microplastics on the predator-induced defenses of Daphnia magna, a zooplankton, exposed to predation risks from Rhodeus ocellatus, a zooplanktivorous fish. Results showed that polystyrene microplastics weakened the predator-induced defenses of D. magna, including morphology, reproduction, and behavior.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Haohan Yang, Zhiyuan Zhang, Jiaqiang Liu, Zhigang Liu, Zhengxie Zhou, Qiyan Feng
Summary: The influence of suspended sediment (SPS) properties on the biological effects of antidepressant citalopram (CIT) was investigated. It was found that the presence of SPS significantly affected the feeding behavior and cellular protection mechanisms of D. magna. Proteins played a crucial role in detoxification and cellular protection under the stress of CIT and SPS. Furthermore, the biological effects of CIT were dose-dependent on SPS properties.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Marina Bellot, Melissa Faria, Cristian Gomez-Canela, Demetrio Raldua, Carlos Barata
Summary: This study assessed the effects of the MAO inhibitor deprenyl on Daphnia magna locomotor activity and determined its mechanisms of action. Results showed that deprenyl exposure inhibited MAO activity and increased neurotransmitter levels, leading to changes in behavioral outcomes. It was concluded that Daphnia magna is a sensitive nonvertebrate model for assessing the effects of short-term exposure to chemicals affecting monoamine signaling.
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.
Correction
Ecology
Yuxuan Zhang, Peiyong Guo, Meixian Wang, Yanmei Wu, Yinshi Sun, Haitao Su, Jun Deng
Summary: A correction to the paper has been published.
Article
Microbiology
Rehab El-Shehawy, Sandra Luecke-Johansson, Anton Ribbenstedt, Elena Gorokhove
Summary: This study revealed a peripheral catecholamine pathway involving the gut microbiome of Daphnia magna, highlighting the role of L-Dopa in communication between the host and microbiome. The findings suggest a crucial role of L-Dopa in the bidirectional communication between the animal host and its gut bacteria, influencing ecologically important host traits.
Article
Environmental Sciences
Guangyuan Lu, Zhongyi Zhang, Wen-Xiong Wang
Summary: Cold seeps are deep-sea 'oases' with dense populations of large mussels and tubeworms. This study investigated metal bioaccumulation and transfer in six benthic species in the Haima cold seep, South China Sea, and found significant differences in trophic positions based on isotopic analysis.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Meng Yang, Wen-Xiong Wang
Summary: This study quantified the nonspecific interactions between three different functional polystyrene nanoplastics and zebrafish cells. The uptake of the nanoplastics in the cells peaked within 2 hours and then decreased, and the uptake rate was similar among the different types of nanoplastics but related to their functionality. The clathrin-mediated and caveolae-mediated pathways were mainly involved in the uptake process. The internalized nanoplastics were transported to lysosomes and exocytosed by the cells via energy-dependent processes. The estimated retention half-lives of the nanoplastics in fish cells were also determined.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Xiangrui Wang, Tak-Fu Hung, Fu-Rong Chen, Wen-Xiong Wang
Summary: In this study, we used in situ techniques to reveal the dissolution process of Cu2O nanoparticles in freshwater. Our findings indicate that cubic Cu2O nanoparticles have a higher dissolution quantity compared with spherical nanoparticles of the same surface area. The difference is mainly attributed to the crystal surface, while other factors like particle size or aggregation status have minor effects. We also demonstrated the simultaneous growth of new small nanoparticles and the dissolution of pristine Cu2O nanoparticles during the dissolution process. The solubility of cubic Cu2O nanoparticles is significantly reduced under O2-limited conditions, suggesting that the O2 concentration largely affects the dependence of dissolution on nanoparticle morphology. Our study highlights the potential application of in situ techniques in tracking the environmental fate of metal-oxide-based nanoparticles, providing important information for assessing the ecological risks of engineered nanoparticles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Teuku Haris Iqbal, Sukree Hajisamae, Apiradee Lim, Sitthisak Jantarat, Wen-Xiong Wang, Karl W. K. Tsim
Summary: This study examined the feeding habits of four-finger threadfin fish and its diet relationship with other fish species in the tropical coastal regions of Thailand. The results showed that the diet composition of threadfin fish varied with their size and ontogeny, and it also shared food resources with other co-existing fish species. Additionally, the size, sex, and collection location of the fish significantly affected their gut fullness index and the number of food types they consumed.
Article
Engineering, Environmental
Xiangrui Wang, Wen-Xiong Wang
Summary: Due to the COVID-19 pandemic, billions of people wear face masks daily, but the potential risks of hazardous materials released from these masks remain largely unexplored. This study evaluates the leachability and cytotoxicity of copper nanoparticles in face masks for the first time. The results show that inhalation of copper from the mask accounts for around 3% of the total copper, and a significant amount of copper attached to the fibers can be easily released into solution. The released copper causes cellular stress and oxidative damage. These findings underscore the need for careful assessment of the leaching of nanoparticles in face masks.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Environmental Sciences
Fei Dang, Chengcheng Li, Luis M. Nunes, Ronggui Tang, Junsong Wang, Shuofei Dong, Willie J. G. M. Peijnenburg, Wenxiong Wang, Baoshan Xing, Su Shiung Lam, Christian Sonne
Summary: Food security and sustainable agriculture are challenges that have been faced for a long time. The use of nanotechnology in agriculture can increase productivity and food security, but it also has negative environmental impacts, such as pollution of the human food chain.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Hao Hu, Yang Li, Guangyuan Lu, Wen-Xiong Wang, Huizhen Li, Jing You
Summary: A 6-year biomonitoring study with oysters in the Pearl River Estuary (PRE), China, examined the annual, seasonal, and spatial characteristics of ultraviolet absorbents (UVAs). The study found that the concentrations of UVAs ranged from 9.1 to 119 ng/g dry wt., peaking in 2018. Significant spatiotemporal variations in UVA contamination were observed, with higher concentrations during the wet season and on the more industrialized eastern coast. Environmental factors such as precipitation, temperature, and salinity significantly influenced UVA bioaccumulation in oysters.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Yiteng Xia, Karl W. K. Tsim, Wen-Xiong Wang
Summary: The subcellular trafficking of zinc ion in rabbitfish fin cells was found to be dose- and time-dependent. Zinc exhibited cytotoxicity when its concentration reached a certain threshold and homeostasis was disrupted when the concentration exceeded a certain level and exposure time exceeded 3 hours. Lysosomes played a major role in regulating zinc homeostasis, while mitochondria were found to be the primary organelles affected by zinc toxicity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Hang Su, Qingjun Zhang, Kunyang Huang, Wen-Xiong Wang, Huizhen Li, Zhoubing Huang, Fei Cheng, Jing You
Summary: A two-compartmental toxicokinetic model is used to explain the interspecies sensitivity of imidacloprid to different aquatic invertebrates by distinguishing relevant levels of toxicity in organisms. The sensitivity to imidacloprid can vary significantly among different species. Internal levels of toxicity and toxicokinetic parameters are essential in understanding interspecies sensitivity. The model demonstrates that imidacloprid exhibits the highest toxicity to Chironomus dilutus, followed by Lumbriculus variegatus, Hyalella azteca, and Daphnia magna. The sensitivity of these invertebrates to imidacloprid varies by over 1000 times based on water concentrations, but decreases to around 50 times when based on internal residues, highlighting the importance of toxicokinetics in interspecies sensitivity. The two-compartmental model successfully simulates the slow elimination of imidacloprid in three species by distinguishing dynamic and toxicologically available fractions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Fisheries
Siwen Zheng, Wen-Xiong Wang
Summary: The functional heterogeneity of fish gills at the single cell scale is important. This study used single cell RNA sequencing to identify 12 cell populations in the gills of Oreochromis niloticus fish and analyzed their functional heterogeneity. The expression patterns of genes encoding ion transporters in different cell populations were examined, as well as the immune cell subtypes. The results provide insights into the physiological and immune responses of fish gills at the cellular level.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Xiangrui Wang, Wen-Xiong Wang
Summary: This article systematically discusses the cellular journey of engineered nanomaterials (NMs), including internalization, intracellular trafficking, and deposition/exocytosis, highlighting that the accumulation of NMs in cells depends not only on their crossing of the cell membrane but also on subsequent trafficking and exocytosis processes. A deeper understanding of the cellular journey of NMs implies an alternative strategy to fabricate specific targeting NMs by bypassing certain intracellular pathways for potent therapeutic effects with minimal toxicity.
Article
Chemistry, Multidisciplinary
Yali Luo, Wen-Xiong Wang
Summary: In this study, the interaction between silver nanoparticles (AgNPs) and hemocytes in oysters was investigated. It was found that both AgNPs and Ag ions caused mitochondrial fragmentation and dysfunction, as well as disrupted mitochondria-lysosome interactions. Mitophagy was also enhanced. This study sheds light on the mechanisms of immune cell cytotoxicity caused by AgNPs.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Multidisciplinary
Shuoli Ma, Wen-Xiong Wang
Summary: This study reveals the regulatory mechanism of nano-Zn on the intestinal microbiota and structure of fish, which improves their health and growth. Dietary supplementation of nano-Zn promotes the colonization of probiotic bacteria in the intestine, while a higher dosage of nano-Zn leads to the growth of pro-inflammatory microorganisms. Nano-Zn also regulates the glucose and lipid metabolism of fish through the modulation of microbiota.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Environmental Sciences
Junwei Yang, Lan Ma, Xiao He, Wing Chi Au, Yanhao Miao, Wen-Xiong Wang, Theodora Nah
Summary: Water-soluble metals have greater adverse effects on human health compared to their water-insoluble forms. Factors controlling the solubilities of aerosol metals in different environments are poorly understood. This study investigated the abundance and fractional solubilities of different metals in size-fractionated aerosols in Hong Kong, identifying the role of sulfate in the acid dissolution of metals in fine aerosols.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Yiteng Xia, Wen-Xiong Wang
Summary: Acute toxicity determination is crucial for ecological risk assessment. Traditional methods require large numbers of animals and take days to obtain results. A cell-based fluorescent assay was developed as an alternative, which allows visualization and quantification of subcellular responses, providing a faster and cheaper method for predicting the acute toxicity of sewage effluents.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)