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Ingestion of Microplastics by Freshwater Tubifex Worms

机译：淡水塔比菲克斯蠕虫对微塑料的摄入

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摘要

Microplastic contamination of the aquatic environment is a global issue. Microplastics can be ingested by organisms leading to negative physiological impacts. The ingestion of microplastics by freshwater invertebrates has not been reported outside the laboratory. Here we demonstrate the ingestion of microplastic particles by Tubifex tubifex from bottom sediments in a major urban waterbody fed by the River Irwell, Manchester, UK. The host sediments had microplastic concentrations ranging from 56 to 2543 particles kg~(-1). 87% of the Tubifex-ingested microplastic particles were microfibers (55—4100 μm in length), while the remaining 13% were microplastic fragments (50—4500 μm in length). FT-IR analysis revealed ingestion of a range of polymers, including polyester and acrylic fibers. While microbeads were present in the host sediment matrix, they were not detected in Tubifex worm tissue. The mean concentration of ingested microplastics was 129 ± 65.4 particles g~(-1) tissue. We also show that Tubifex worms retain microplastics for longer than they retain other particulate components of the ingested sediment matrix. Microplastic ingestion by Tubifex worms poses a significant risk for trophic transfer and biomagnification of microplastics up the aquatic food chain.
机译：水生环境的微塑性污染是一个全球性问题。微生物可能摄入微塑料，从而导致负面的生理影响。尚未在实验室外报道淡水无脊椎动物摄入微塑料。在这里，我们证明了英国的曼彻斯特Irwell河为主要城市水体中的Tubifex tubifex从底部沉积物中摄入的微塑性颗粒。宿主沉积物的微塑性浓度范围为56〜2543颗粒kg〜（-1）。 Tubifex摄取的微塑料颗粒中有87％是微纤维（长度为55-4100μm），其余13％是微塑料碎片（长度为50-4500μm）。 FT-IR分析表明摄入了多种聚合物，包括聚酯和丙烯酸纤维。尽管宿主沉积物基质中存在微珠，但在塔比菲克斯蠕虫组织中未检测到微珠。摄入的微塑料的平均浓度为129±65.4颗粒g〜（-1）组织。我们还显示，塔比菲克斯蠕虫保留微塑料的时间比它们保留摄入的沉积物基质的其他颗粒成分更长的时间。 Tubifex蠕虫摄入的微塑料对水生食物链上的微塑料进行营养转移和生物放大带来了极大的风险。

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  • 来源
    《Environmental Science & Technology》 |2017年第21期|12844-12851|共8页
  • 作者

    Rachel R. Hurley; Jamie C. Woodward; James J. Rothwell;

  • 作者单位

    Department of Geography, The University of Manchester, Manchester, M13 9PL, United Kingdom;

    Department of Geography, The University of Manchester, Manchester, M13 9PL, United Kingdom;

    Department of Geography, The University of Manchester, Manchester, M13 9PL, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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