Effects of different shapes of microplastics on Daphnia magna

Sana Gull, Patricia Mputu Tshilombo, Valmir Zimberi, Natasha Gloria Efua Serwaa Kodua, Zivile Buivydaite & Hermela Berhe Woldekidan

Studenteropgave: Basisprojekt

Abstrakt

Plastic pollution is an emerging problem in the aquatic environment and various literature was published concerning this topic. The aim of this report, is to investigate and discuss if different shapes of microplastics (MP) have different effects on freshwater organisms, like D. magna. Soft fibers, hard fibers, fragments and microbeads were examined.
After 48 hours of exposure, no ingestion of MP was observed. However, soft fibers were externally attached to the antennae and appendages of D. magna. In one third of the cases, the amount of fibers attached was so big that D. magna were incapable to swim. In order to recover, they were transferred into a MP-free medium for an additional 24 hours, but they were found dead afterwards. This indicates that microfibers potentially possess different dangers to the environment than the other shapes and therefore MP cannot be considered as one type of pollutant, disregarding the differences among them.

UddannelserBasis - International Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Basis
SprogEngelsk
Udgivelsesdato29 maj 2017
Antal sider30
VejledereKristian Syberg