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Risks of floating microplastic in the global ocean
Everaert, G.; De Rijcke, M.; Lonneville, B.; Janssen, C.R.; Backhaus, T.; Mees, J.; van Sebille, E.; Koelmans, A.A.; Catarino, A.I.; Vandegehuchte, M. (2020). Risks of floating microplastic in the global ocean. Environ. Pollut. 207: 115499. https://hdl.handle.net/10.1016/j.envpol.2020.115499
In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491; e-ISSN 1873-6424, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    Microplastic; Environmental Risk Assessment; Marine Ecosystems; Multidecadal; Spatial Distribution

Authors  Top 
  • Everaert, G., more
  • De Rijcke, M., more
  • Lonneville, B., more
  • Janssen, C.R., more
  • Backhaus, T.
  • Mees, J., more
  • van Sebille, E.
  • Koelmans, A.A.
  • Catarino, A.I., more
  • Vandegehuchte, M., more

Abstract
    Despite the ubiquitous and persistent presence of microplastic (MP) in marine ecosystems, knowledge of its potential harmful ecological effects is low. In this work, we assessed the risk of floating MP (1 μm – 5 mm) to marine ecosystems by comparing ambient concentrations in the global ocean with available ecotoxicity data. The integration of twenty-three species-specific effect threshold concentration data in a species sensitivity distribution yielded a median unacceptable level of 1.21 * 105 MP m-³ (95% CI: 7.99 * 103 – 1.49 * 106 MP m-³). We found that in 2010 for 0.17% of the surface layer (0 – 5 m) of the global ocean a threatening risk would occur. By 2050 and 2100, this fraction increases to 0.52% and 1.62%, respectively, according to the worst-case predicted future plastic discharge into the ocean. Our results reveal a spatial and multidecadal variability of MP-related risk at the global ocean surface. For example, we have identified the Mediterranean Sea and the Yellow Sea as hotspots of marine microplastic risks already now and even more pronounced in future decades.

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