Author(s): Stephanie Oswald; Ad M. J. Ragas; Margriet M. Schoor And Frank P. L. Collas
Linked Author(s):
Keywords: Monitoring techniques Macroplastics Mesoplastics SWOT analysis
Abstract: Several monitoring techniques have been used to collect information on the presence of macro- and mesoplastics in river systems. The differences between methodological approaches and the limited knowledge of the fundamental processes that affect plastic presence and detection ability lead to a lack of standardization between methods. In this study, we assessed the variation in macro- and mesoplastics abundance and composition in the river Rhine influenced by different techniques, i. e., larvae net, trawl net, and a stow net. Additionally, we performed an analysis highlighting the strengths, weaknesses, opportunities, and threats (SWOT analysis) of the three methods. More unique macro- and mesoplastics categories were found during trawl net and stow net monitoring than those found during simultaneous larvae net monitoring. However, macro- and mesoplastics concentrations were significantly higher in the larvae net samples than in the trawl net and stow net samples. Overall, the trawl net performed better than the other two methods. The outcome of the current study can be used to support policymakers, industry, and the scientific community to devise a successful monitoring strategy for macro- and mesoplastics pollution in rivers, where the SWOT analysis facilitates the choice of the approach that best aligns with the specific monitoring goals and the environmental conditions of the target area.
Year: 2025