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/g_dw (dw = dry weight); and 9 of 10 pooled polychaete samples, from 11 to 880 particles/g_ww (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 g_dw/g_ww (280–31000 g_dw/g_dw). 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.

收集了来自挪威大陆架和巴伦支海的沉积物样本（0-1厘米）和管式多栖小木屋，包括靠近油气设施和偏远地区的区域。在35个沉积物样品中的27个中，可量化的微量塑料（≥45μm）为0.039至3.4颗粒/ g _dw（dw =干重）；10个混合多毛类样本中的9个，从11到880颗粒/ g _ww（ww =湿重）。在管栖多栖动物中，其浓度明显高于同一地点的沉积物（p <0.0097），数量级高。我们引入了生物沉积物颗粒富集因子（BSPEF）来量化多壳动物中该因子的增加，范围从100到11000 g _dw / g _ww（280-31000 g_dw / g _dw）。在多毛管中观察到的微塑性水平高于软组织（n = 4）。管栖多毛cha的摄食行为和生命周期可能对海底微塑料的运输，分布和食物链动力学产生重要影响。