Effects of Different Microplastic Types and Surfactant-Microplastic Mixtures Under Fasting and Feeding Conditions: A Case Study on Daphnia magna

2019 ◽  
Vol 103 (3) ◽  
pp. 367-373 ◽  
Author(s):  
Monia Renzi ◽  
Eleonora Grazioli ◽  
Andrea Blašković
Keyword(s):  
Daphnia Magna

Can mixtures of cyanotoxins represent a risk to the zooplankton? The case study of Daphnia magna Straus exposed to hepatotoxic and neurotoxic cyanobacterial extracts

Harmful Algae ◽  
2014 ◽  
Vol 31 ◽  
pp. 143-152 ◽  
Author(s):  
Emanuela Cristina Freitas ◽  
Carlos Pinheiro ◽  
Odete Rocha ◽  
Susana Loureiro
Keyword(s):  
Daphnia Magna

Bioavailability of HOC depending on the colloidal state of humic substances: A case study with PCB-77 and Daphnia magna

Chemosphere ◽  
2005 ◽  
Vol 61 (2) ◽  
pp. 282-292 ◽  
Author(s):  
T. Gallé ◽  
Ch. Grégoire ◽  
M. Wagner ◽  
R. Bierl
Keyword(s):  
Humic Substances ◽  
Daphnia Magna ◽  
Colloidal State

Does the exposure mode to ENPs influence their toxicity to aquatic species? A case study with TiO2 nanoparticles and Daphnia magna

2015 ◽  
Vol 22 (7) ◽  
pp. 5050-5058 ◽  
Author(s):  
Beatrice Salieri ◽  
Andrea Pasteris ◽  
Jonas Baumann ◽  
Serena Righi ◽  
Jan Köser ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Daphnia Magna ◽  
Aquatic Species

Do titanium dioxide nanoparticles induce food depletion for filter feeding organisms? A case study with Daphnia magna

2016 ◽  
Vol 214 ◽  
pp. 840-846 ◽  
Author(s):  
Mirco Bundschuh ◽  
Roland Vogt ◽  
Frank Seitz ◽  
Ricki R. Rosenfeldt ◽  
Ralf Schulz
Keyword(s):  
Titanium Dioxide ◽  
Daphnia Magna ◽  
Titanium Dioxide Nanoparticles ◽  
Filter Feeding ◽  
Food Depletion

scholarly journals Action of Surfactants in Driving Ecotoxicity of Microplastic-Nano Metal Oxides Mixtures: A Case Study on Daphnia magna under Different Nutritional Conditions

2021 ◽  
Author(s):  
Cristiana Guerranti ◽  
Serena Anselmi ◽  
Francesca Provenza ◽  
Andrea Blašković ◽  
Monia Renzi
Keyword(s):  
Metal Oxides ◽  
Daphnia Magna ◽  
Model Organism ◽  
Additive Effects ◽  
Simultaneous Presence ◽  
Nutritional Conditions ◽  
Ecotoxicity Tests ◽  
Series Of Experiments ◽  
The Individual

The series of experiments presented in the paper served to clarify the effects of contemporary exposure to surfactant, microplastics (polyethylene and polyvinyl chloride), and nanoparticles (TiO2 and ZnO) on the model organism Daphnia magna. Exposure was evaluated with respect to the age of the organisms (“young”, 24 hours old, and “aged” 10 days old specimens), trophic status (feeding or fasting), and the simultaneous presence of a surfactant. All the above-mentioned substances are present in the wastewater coming from various environmental sources from cosmetic products. The experiments were conducted in compliance with the OECD 202:2004 guideline, which is also a reference for ecotoxicity tests required by REACH. The results showed that surfactants enhance effects of toxicity produced by the exposure to the microplastic + nanoparticle mixtures. The influence due to factors such as nutrition (effect in fasting >> feeding conditions) and the age of individuals (effects in older >> younger animals) is essential. Concerning young individuals, exposure to PE-TiO2 is the most significant in terms of effects produced: it is very significant, especially in the presence of surfactant (both under fasting and feeding conditions). On the contrary, exposure to the PE-Zn mixture shows the minor effects. The comparison with the literature, especially as regards the possibility of interpreting the toxicity trends for the various mixtures with respect to the individual elements that compose them, leads to hypothesize additive effects still to be investigated and confirms the greatest toxicity contribution of TiO2.

scholarly journals The application of an early-warning biomonitoring system (EWBS) in a Canadian context

2021 ◽  
Author(s):  
Andrea Dort
Keyword(s):  
Drinking Water ◽  
Daphnia Magna ◽  
Early Warning ◽  
First Nation ◽  
The Political ◽  
General Finding ◽  
Canadian Context ◽  
Case Study Site ◽  
Potential Use

A nationwide jurisdictional analysis of drinking water frameworks was conducted to identify the political backdrop for the integration of the EWBS. Canada demonstrates no consistency in drinking water regulations and policies for EWBS application. While it is not possible for all specific contaminants to be monitored, the EWBS has the potential to effectively detect classes of contaminants applicable nationwide. A case study site was investigated for potential use of the EWBS. The general finding indicated that, despite having an advanced plant, unpredicted spills from upstream industries will continue to represent potential hazards for Walpole Island First Nation. Copper was identified as a contaminant of concern for the study site and was applied in behavioural bioassays using Daphnia magna. Three responses were examined upon exposure to varying concentrations of copper and results indicated change in swimming height as the most sensitive response for utility in an EWBS, followed by immobility.

scholarly journals Filming of zooplankton: a case study of rotifer males and Daphnia magna

2015 ◽  
Author(s):  
Pierluigi Colangeli ◽  
Adam Cieplinski ◽  
Ulrike Obertegger
Keyword(s):  
Daphnia Magna ◽  
Public Awareness ◽  
Digital Cameras ◽  
Keratella Cochlearis ◽  
Scientific Discussion ◽  
Single Lens ◽  
Cyclical Parthenogens ◽  
Written Descriptions ◽  
Scientific Value

<p>Filming live organisms can give new insights into the hidden life of plankton. Accessibly priced digital cameras are now available for a large range of users. Here, we demonstrate the technical setup and workflow of using a single-lens reflex (DSLR) camera to film the behaviour of males of two rotifer species, <em>Brachionus angularis</em> Gosse (1851) and <em>Keratella cochlearis</em> Gosse (1851), and of the cladoceran <em>Daphnia magna</em> Straus (1820). Rotifers are cyclical parthenogens that produce males only under certain environmental conditions. Thus, knowledge on rotifer males is still limited because of their ephemeral nature and because they are often smaller than females. We filmed males of <em>B. angularis</em> and <em>K. cochlearis</em> with a DSLR camera connected to a compound microscope to better understand their morphology and behaviour in comparison to conspecific females. While written descriptions have their scientific value, seeing is complementary because everyone can verify what has been described. We made our videos publicly accessible through links connected to the paper. Our videos are, to our best knowledge, the first on males of<em> B. angularis</em> and <em>K</em>. <em>cochlearis</em>. Furthermore, we filmed the behavioural response of <em>D. magna</em> to ultraviolet (UV) radiation with a macro lens attached to the DSLR camera. Approaches like this are valuable tools in environmental teaching. To see live organisms with one’s own eyes may contribute to raising public awareness about the value of water resources and their hidden communities. In summary, filming can be a valuable tool to ignite scientific discussion, but the videos need an open-access platform where they can be referenced in a topic-related order.</p>

Antioxidant defence system is responsible for the toxicological interactions of mixtures: A case study on PFOS and PFOA in Daphnia magna

2019 ◽  
Vol 667 ◽  
pp. 435-443 ◽  
Author(s):  
Hong-Bo Yang ◽  
Ya-Zhou Zhao ◽  
Yue Tang ◽  
Hui-Qin Gong ◽  
Feng Guo ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Antioxidant Defence ◽  
Defence System ◽  
Antioxidant Defence System

Is ultraviolet radiation a synergistic stressor in combined exposures? The case study of Daphnia magna exposure to UV and carbendazim

2011 ◽  
Vol 102 (1-2) ◽  
pp. 114-122 ◽  
Author(s):  
Fabianne Ribeiro ◽  
Nuno C.G. Ferreira ◽  
Abel Ferreira ◽  
Amadeu M.V.M. Soares ◽  
Susana Loureiro
Keyword(s):  
Ultraviolet Radiation ◽  
Daphnia Magna ◽  
Combined Exposures
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