Smells good enough to eat: Dimethyl sulfide (DMS) enhances copepod ingestion of microplastics

MARINE POLLUTION BULLETIN

卷:138

Article

Procter, Jade^1,2  Hopkins, Frances E.²  Fileman, Elaine S.²  Lindeque, Penelope K.² 

[1] Univ Plymouth, Sch Marine Sci & Engn, Plymouth PL4 8AA, Devon, England

[2] Plymouth Marine Lab, Prospect Pl, Plymouth PL1 3DH, Devon, England

关键词: Marine microplastics;    Microfibre ingestion;    Copepods;    Infochemistry;    Dimethyl sulfide;    Chemsosensory mechanisms;   

DOI  :  10.1016/j.marpolbul.2018.11.014

来源: Elsevier

【 摘 要 】

Marine copepods have been shown to readily ingest microplastics - a crucial first step in the transfer of plastics into the marine food chain. Copepods have also been shown to elicit a foraging behavioural response to the presence of olfactory stimuli, such as dimethyl sulfide (DMS) - a volatile compound produced by their algal prey. Here, we show that the temperate Calanoid copepod Calanus helgolandicus displays enhanced grazing rates of between 0.7 and 3-fold (72%-292%) on microplastics that have been infused in a DMS solution, compared to DMS-free controls. Environmental exposure of microplastics may result in the development of an olfactory signature that includes algal-derived compounds such as DMS. Our study provides evidence that copepods, which are known to use chemosensory mechanisms to identify and locate dense sources of palatable prey, may be at an increased risk of plastic ingestion if it mimics the scent of their prey.

【 授权许可】

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