Are we underestimating microplastic abundance in the marine environment? A comparison of microplastic capture with nets of different mesh-size

Microplastic debris is ubiquitous and yet sampling, classifying and enumerating this prolific pollutant in marine waters has proven challenging. Typically, waterborne microplastic sampling is undertaken using nets with a 333 μm mesh, which cannot account for smaller debris. In this study, we provide an estimate of the extent to which microplastic concentrations are underestimated with traditional sampling. Our efforts focus on coastal waters, where microplastics are predicted to have the greatest influence on marine life, on both sides of the North Atlantic Ocean. Microplastic debris was collected via surface trawls using 100, 333 and 500 μm nets. Our findings show that sampling using nets with a 100 μm mesh…

• SR
  Sight Research UK

  Awards: NE/L003988/1, NE/L007010/1
• UO
  University of Exeter
• MR
  Medical Research Council

  Award: MR/S019669/1
• NE
  Natural Environment Research Council

  Awards: NE/L007010/1, NE/L007010/1, NE/L007010, L007010, NE/L003988/1, NE/L003988/1