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Microcosm evaluation of the effects of an eight pharmaceutical mixture to the aquatic macrophytes Lemna gibba and Myriophyllum sibiricum.
TLDR
The microcosm data suggest that at an ecological effect size of >20%, biologically significant risks are low for L. gibba and M. sibiricum exposed to similar mixtures of pharmaceutical compounds, which is below the threshold value of 1 for chronic risks. Expand
Aquatic plants exposed to pharmaceuticals: effects and risks.
TLDR
The risk assessment for this review was based almost entirely on evaluations of gross morphological endpoints, which generally indicated that the risk pharmaceuticals pose to aquatic plants is generally low, with a few exceptions, particularly blue-green algae exposed to antibiotics, and both green and blue- green algae exposure to triclosan. Expand
Development and Calibration of an Organic-Diffusive Gradients in Thin Films Aquatic Passive Sampler for a Diverse Suite of Polar Organic Contaminants.
TLDR
The o-DGT sampler is a promising monitoring tool that is largely insensitive to the DBL under typical flow conditions, facilitating the application of measured/modeled diffusion-based sampling rates and significantly reduces the need for sampler calibration. Expand
Effects of Atrazine in Fish, Amphibians, and Reptiles: An Analysis Based on Quantitative Weight of Evidence
TLDR
The WoE showed that atrazine might affect biomarker-type responses, such as expression of genes and/or associated proteins, concentrations of hormones, and biochemical processes, at concentrations sometimes found in the environment, but these effects were not translated to adverse outcomes in terms of apical endpoints. Expand
Microplastic contamination in Lake Winnipeg, Canada.
TLDR
Densities of microplastics in Lake Winnipeg are reported for the first time, adding to the growing evidence that microplastic contamination is widespread even around sparsely-populated freshwater ecosystems, and provides a baseline for future study and risk assessments. Expand
A critical assessment of the photodegradation of pharmaceuticals in aquatic environments: defining our current understanding and identifying knowledge gaps.
TLDR
A major recommendation is the development of a method guideline, based on this rubric, for conducting and reporting on photochemical studies that would produce consistent and reliable data for quantitative comparison across studies. Expand
Haloacetic acids in the aquatic environment. Part II: ecological risk assessment.
TLDR
It was found that HAAs do not pose a significant risk to freshwater macrophytes at current environmental concentrations in Canada, Europe or Africa for both single compound and mixture exposures. Expand
Comprehensive characterization of the acute and chronic toxicity of the neonicotinoid insecticide thiamethoxam to a suite of aquatic primary producers, invertebrates, and fish.
TLDR
Overall, based on acute toxicity endpoints, the potential acute risk to freshwater organisms was found to be minimal and 5% hazard concentrations for acute data (freshwater invertebrates), and compared these with measured concentrations from relevant North American surface waters were comparable to that of freshwater species. Expand
Selenium concentration, speciation and behavior in surface waters of the Canadian prairies.
TLDR
Results indicate that Se concentrations in the prairie waters of southern Manitoba are presently low except during the snowmelt season, that Se speciation is dominated by selenate which is of lower toxicity than selenite, and that if additional Se is discharged into the prairies, it will be quickly removed from the surface water to the sediment. Expand
Presence and hazards of nutrients and emerging organic micropollutants from sewage lagoon discharges into Dead Horse Creek, Manitoba, Canada.
TLDR
It is advisable that wastewater treatment and management strategies such as constructed wetlands and/or staggered releases be used in order to minimize the hazard posed by nutrient pulses in Dead Horse Creek and other similar systems. Expand
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