Microplastics, microfibres and nanoplastics cause variable sub-lethal responses in mussels (Mytilus spp.)

MARINE POLLUTION BULLETIN

卷:160

Article

Cole, Matthew^1,2  Liddle, Corin¹  Consolandi, Giulia^1,3  Drago, Claudia^1,4  Hird, Cameron¹  Lindeque, Penelope K.²  Galloway, Tamara S.¹ 

[1] Univ Exeter, Coll Life & Environm Sci Biosci, Exeter EX4 4QD, Devon, England

[2] Plymouth Marine Lab, Marine Ecol & Biodivers Grp, Plymouth PL1 3DH, Devon, England

[3] Univ Portsmouth, Sch Environm Geog & Geosci, Portsmouth PO1 3QL, Hants, England

[4] Univ Potsdam, Dept Ecol & Ecosyst Modelling, Neuen Palais 10, D-14469 Potsdam, Germany

关键词: Plastic;    Litter;    Debris;    Pollution;    Shellfish;    Bivalve;    Fibres;    Exposure;    Ecotoxicology;   

DOI  :  10.1016/j.marpolbul.2020.111552

来源: Elsevier

【 摘 要 】

We compare the toxicity of microplastics, microfibres and nanoplastics on mussels. Mussels (Mytilus spp.) were exposed to 500 ng mL(-1) of 20 mu m polystyrene microplastics, 10 x 30 mu m polyamide microfibres or 50 nm polystyrene nanoplastics for 24 h or 7 days. Biomarkers of immune response, oxidative stress response, lysosomal destabilisation and genotoxic damage were measured in haemolymph, digestive gland and gills. Microplastics and microfibres were observed in the digestive glands, with significantly higher plastic concentrations after 7-days exposure (ANOVA, P < 0.05). Nanoplastics had a significant effect on hyalinocytegranulocyte ratios (ANOVA, P < 0.05), indicative of a heightened immune response. SOD activity was significantly increased followed 24 h exposure to plastics (two-way ANOVA, P < 0.05), but returned to normal levels after 7-days exposure. No evidence of lysosomal destabilisation or genotoxic damage was observed from any form of plastic. The study highlights how particle size is a key factor in plastic particulate toxicity.

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