"The pharmaceuticals and chemicals in everyday use form a mixture in the ocean that has a direct impact on the growth and reproduction of organisms", says scientist Tobias Porsbring.
Scientist Tobias Porsbring at the Department of Plant and Environmental Sciences at the University of Gothenburg has studied natural communities of microalgae along the Swedish west coast. He presents results in his doctoral thesis that show how the use of a common agent against skin fungi, clotrimazole, is associated with major environmental risks.
"The levels of clotrimazole that are measured in the environment affect the synthesis of sterols in the algae, and these are important in several functions in the algal cells. The growth and reproduction of the algae are disturbed. Single-cell microalgae are the fundamental basis of the ocean food chain, and the use of clotrimazole thus may affect the complete ocean ecosystem", says Tobias Porsbring.
"Cocktail effect" on microalgae
The fact that low levels of a pollutant that are insufficient to cause a detectable effect may contribute to a larger, combined effect with other chemicals emphasises that cocktail effects are a real environmental problem. Despite this, assessments of environmental risk are usually carried out on one chemical at a time. Through knowledge of environmental levels and the impact of individual chemicals Tobias Porsbring's thesis launch a theoretical model for calculating how cocktail effects arise. This model can be used to obtain highly reliable estimates of the composite environmental risk from mixtures of chemicals in the ocean ecosystem.
The thesis "On Toxicant-Induced Succession in Periphyton Communities: Effects of Single Chemicals and Chemical Mixtures" was defended at a disputation on 20 March. Tobias Porsbring's supervisor was Professor Hans Blanck.This doctoral thesis was produced as a collection of papers:
Further reports about: > Clotrimazole > Drug Delivery > Environmental Sciences > Science TV > Wastewater > anti-depressant pharmaceutical > cocktail-effect > environmental risk > fluoxetine > hazardous chemicals > marine pollutant > microalgae > ocean ecosystem > over-the-counter skin creams > personal-care products > skin conditions
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