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A comparison of sampling methods for seawater microplastics and a first report of the microplastic litter in coastal waters of Ascension and Falkland Islands
Crowley, Quentin; Green, Danielle S.; Kregting, Louise; Boots, Bas; Blockley, David J.; Brickle, Paul; da Costa, Marushka
To date there is no gold standard for sampling microplastics. Zooplankton sampling methods, such as plankton and Neuston nets, are commonly used to estimate the concentrations of microplastics in seawater, but their ability to detect microplastics is limited by their mesh size. We compared different net-based sampling methods with different mesh sizes including bongo nets (>500??m), manta nets (>300??m) and plankton nets (>200??m and >400??m) to 1?litre bottle grabbed, filtered (0.45??m) samples. Concentrations of microplastics estimated using net-based methods were ~3 orders of magnitude less than those estimated by 1?litre grab samples. Some parts of the world with low human populations, such as Ascension Island and the Falkland Islands, lack baseline data on microplastics. Using the bottle grab sampling method we found that microplastic litter was present at these remote locations and was comparable to levels of contamination in more populated coastal regions, such as the United Kingdom.
Keyword(s): Grab samples; Nets; Anthropogenic litter; Remote; Atlantic Ocean; Smart & Sustainable Planet; Microplastic; SEA WATER
Publication Date:
2018
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): Green, D.S. Kregting, L., Boots, B., Blockley, D.J., Brickle, P., da Costa, M. & Crowley, Q., A comparison of sampling methods for seawater microplastics and a first report of the microplastic litter in coastal waters of Ascension and Falkland Islands, Marine Pollution Bulletin, 137, 2018, 695-701
Related Link(s): https://www.sciencedirect.com/science/article/pii/S0025326X18307811
First Indexed: 2019-12-24 08:38:26 Last Updated: 2019-12-24 08:38:26