Microplastic accumulation by tube-dwelling, suspension feeding polychaetes from the sediment surface: A case study from the Norwegian Continental Shelf

• Published in: Marine Environmental Research
• Main Authors: Knutsen, Heidi, Cyvin, Jakob Bonnevie, Totland, Christian, Wade, Emma Jane, Castro, Veronica, Pettersen, Arne, Laugesen, Jens, Møskeland, Thomas, Arp, Hans Peter, Lilleeng, Øyvind
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2020
• Subjects: Barents Sea
• Online Access: https://hdl.handle.net/11250/2676740; https://doi.org/10.1016/j.marenvres.2020.105073

Sediment samples (0–1 cm) and tube-dwelling polychaetes from the Norwegian Continental Shelf and the Barents Sea were collected, including areas close to oil and gas installations and remote locations. Microplastics (≥45 μm) were found in quantifiable levels in 27 of 35 sediment samples, from 0.039 to 3.4 particles/gdw (dw = dry weight); and 9 of 10 pooled polychaete samples, from 11 to 880 particles/gww (ww = wet weight). Concentrations were significantly higher in tube-dwelling polychaetes than sediments from the same locations (p < 0.0097) by orders of magnitude. We introduce a Biota-Sediment Particle Enrichment Factor (BSPEF) to quantify this factor increase in polychaetes, which ranged from 100 to 11000 gdw/gww (280–31000 gdw/gdw). Higher microplastic levels were observed in polychaete tube than in soft tissue (n = 4). The feeding behavior and life cycle of tube-dwelling polychaetes could have an important influence on the transport, distribution and food-chain dynamics of microplastics on the seafloor. publishedVersion