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Microplastics alter feeding selectivity and faecal density in the copepod, Calanus helgolandicus.
Sci Total Environ. 2019 Oct 15; 687:780-789.ST

Abstract

Microplastics (1 μm-5 mm) are a ubiquitous marine contaminant of global concern, ingested by a wide range of marine taxa. Copepods are a key component of marine food webs, providing a source of food for higher trophic levels, and playing an important role in marine nutrient cycling. Microplastic ingestion has been documented in copepods, but knowledge gaps remain over how this affects feeding preference and faecal density. Here, we use exposure studies incorporating algal prey and microplastics of varying sizes and shapes at a concentration of 100 microplastics mL-1 to show: (1) prey selection by the copepod Calanus helgolandicus was affected by the size and shape of microplastics and algae they were exposed to; Exposure to nylon fibres resulted in a 6% decrease in ingestion of similar shaped chain-forming algae, whilst exposure to nylon fragments led to an 8% decrease in ingestion of a unicellular algae that were similar in shape and size. (2) Ingestion of microplastics with different densities altered the sinking rates of faecal pellets. Faeces containing low-density polyethylene sank significantly more slowly than controls, whilst sinking rates increased when faeces contained high-density polyethylene terephthalate. These results suggest that C. helgolandicus avoid ingesting algae that are similar in size and/or shape to the microplastic particles they are exposed to, potentially in a bid to avoid consuming the plastic.

Authors+Show Affiliations

Marine Ecology and Biodiversity Group: Plymouth Marine Laboratory, Plymouth PL1 3DH, UK; College of Life and Environmental Science: Biosciences, University of Exeter, Exeter EX4 4QP, UK.College of Life and Environmental Science: Biosciences, University of Exeter, Exeter EX4 4QP, UK.Marine Ecology and Biodiversity Group: Plymouth Marine Laboratory, Plymouth PL1 3DH, UK.Marine Ecology and Biodiversity Group: Plymouth Marine Laboratory, Plymouth PL1 3DH, UK.Marine Ecology and Biodiversity Group: Plymouth Marine Laboratory, Plymouth PL1 3DH, UK.Marine Ecology and Biodiversity Group: Plymouth Marine Laboratory, Plymouth PL1 3DH, UK. Electronic address: pkw@pml.ac.uk.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31412481

Citation

Coppock, Rachel L., et al. "Microplastics Alter Feeding Selectivity and Faecal Density in the Copepod, Calanus Helgolandicus." The Science of the Total Environment, vol. 687, 2019, pp. 780-789.
Coppock RL, Galloway TS, Cole M, et al. Microplastics alter feeding selectivity and faecal density in the copepod, Calanus helgolandicus. Sci Total Environ. 2019;687:780-789.
Coppock, R. L., Galloway, T. S., Cole, M., Fileman, E. S., Queirós, A. M., & Lindeque, P. K. (2019). Microplastics alter feeding selectivity and faecal density in the copepod, Calanus helgolandicus. The Science of the Total Environment, 687, 780-789. https://doi.org/10.1016/j.scitotenv.2019.06.009
Coppock RL, et al. Microplastics Alter Feeding Selectivity and Faecal Density in the Copepod, Calanus Helgolandicus. Sci Total Environ. 2019 Oct 15;687:780-789. PubMed PMID: 31412481.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microplastics alter feeding selectivity and faecal density in the copepod, Calanus helgolandicus. AU - Coppock,Rachel L, AU - Galloway,Tamara S, AU - Cole,Matthew, AU - Fileman,Elaine S, AU - Queirós,Ana M, AU - Lindeque,Penelope K, Y1 - 2019/06/10/ PY - 2019/03/27/received PY - 2019/05/30/revised PY - 2019/06/01/accepted PY - 2019/8/16/entrez PY - 2019/8/16/pubmed PY - 2019/11/9/medline KW - Biological carbon pump KW - Faecal pellet KW - Marine pollution KW - Plastic KW - Sinking KW - Zooplankton SP - 780 EP - 789 JF - The Science of the total environment JO - Sci. Total Environ. VL - 687 N2 - Microplastics (1 μm-5 mm) are a ubiquitous marine contaminant of global concern, ingested by a wide range of marine taxa. Copepods are a key component of marine food webs, providing a source of food for higher trophic levels, and playing an important role in marine nutrient cycling. Microplastic ingestion has been documented in copepods, but knowledge gaps remain over how this affects feeding preference and faecal density. Here, we use exposure studies incorporating algal prey and microplastics of varying sizes and shapes at a concentration of 100 microplastics mL-1 to show: (1) prey selection by the copepod Calanus helgolandicus was affected by the size and shape of microplastics and algae they were exposed to; Exposure to nylon fibres resulted in a 6% decrease in ingestion of similar shaped chain-forming algae, whilst exposure to nylon fragments led to an 8% decrease in ingestion of a unicellular algae that were similar in shape and size. (2) Ingestion of microplastics with different densities altered the sinking rates of faecal pellets. Faeces containing low-density polyethylene sank significantly more slowly than controls, whilst sinking rates increased when faeces contained high-density polyethylene terephthalate. These results suggest that C. helgolandicus avoid ingesting algae that are similar in size and/or shape to the microplastic particles they are exposed to, potentially in a bid to avoid consuming the plastic. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/31412481/Microplastics_alter_feeding_selectivity_and_faecal_density_in_the_copepod_Calanus_helgolandicus_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)32563-X DB - PRIME DP - Unbound Medicine ER -