The ingestional effects of polyethylene microbeads on Hyalella azteca

Hasan Mustafa Mahamed Osman, Emma Hanne Pirmo Lillelund, Teodora-Francesca Ràdut, Søren Vester Kofoed & Leire Basaras Arroyo

Studenteropgave: Basisprojekt


Increasing demands for microplastics in commercial products is directly proportional to the pollution caused by these plastics. Evidence of microplastics have been recorded in both freshwater and marine ecosystems. With this evidence, it is no surprise that microplastics have been detected in the alimentary canal of a variety of different organisms. However, the potential effects of this unnatural ingestion have been infrequently studied. This study focuses on one these effects: the possible satiation caused by the ingestion of fluorescent orange polyethylene microbeads, in an experiment performed on H. azteca. Performing a pre-experiment, efforts were made to determine the optimal filter for measuring food recovery. Following the pre-experiment, the main experiment consisted of a 4-day feeding with one of the four following feeding treatments: 100% polyethylene microbeads; 50% polyethylene microplastics-50% rabbit pellets; and two control groups, one not fed, one fed with 100% rabbit pellets. On the fifth day, the four groups were then fed with the same treatment. Using the data from the rabbit pellets recovery, our results showed that the standard deviations of 100% polyethylene microbeads and 50% polyethylene microbeads 50% rabbit pellets were high, 3.77% and 4.15% respectively. All treatments gave us a recovery percentage between 64% and 68%, hence the results could be seen as statistically random and did not prove the original hypothesis correct. This study may contribute to future studies experimenting with this effect.

UddannelserBasis - Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Bachelor
Udgivelsesdato29 maj 2016
VejledereFarhan Khan