Sources, Distribution, and Fate of Microscopic Plastics in Marine Environments
Microplastics are pieces of plastic debris <5 mm in diameter. They enter the environment from a variety of sources including the direct input of small pieces such as exfoliating beads used in cosmetics and as a consequence of the fragmentation of larger items of debris. A range of common polymers, including polyethylene, polypropylene, polystyrene, and polyvinyl chloride, are present in the environment as microplastic particles. Microplastics are widely distributed in marine and freshwater habitats. They have been reported on shorelines from the poles to the equator; they are present at the sea surface and have accumulated in ocean systems far from land. Microplastics are also present in substantial quantities on the seabed. A wide range of organisms including birds, fish, and invertebrates are known to ingest microplastics and for some species it is clear that a substantial proportion of the population have microplastic in their digestive tract. The extent to which this might have harmful effects is not clear; however, the widespread encounter rate indicates that substantial quantities of microplastic may be distributed within living organisms themselves as well as in the habitats in which they live. Our understanding about the long-term fate of microplastics is relatively limited. Some habitats such as the deep sea may be an ultimate sink for the accumulation of plastic debris at sea; indeed, some recent evidence indicates quantities in the deep sea can be greater than at the sea surface. It has also been suggested that microplastics might be susceptible to biodegradation by microorganisms; however, this is yet to be established and the prevailing view is that even if emissions of debris to the environment are substantially reduced, the abundance of microplastics will increase over the next few decades. However, it is also clear that the benefits which plastics bring to society can be realized without the need for emissions of end-of-life plastics to the ocean. To some extent the accumulation of microplastic debris in the environment is a symptom of an outdated business model. There are solutions at hand and many synergistic benefits can be achieved in terms of both waste reduction and sustainable use of resources by moving toward a circular economy.
KeywordsContamination Harm Microplastic Policy Pollution Solutions
- 3.Ryan PG, Moloney CL (1990) Plastic and other artifacts on South-African beaches – temporal trends in abundance and composition. S Afr J Sci 86(7–10):450–452Google Scholar
- 5.Arthur C, Baker J, Bamford H (2009) Proceedings of the international research workshop on the occurrence, effects and fate of microplastic marine debris, 2008 September 9–11, NOAA Technical Memorandum NOS-OR&R30Google Scholar
- 8.MSFD GES Technical Subgroup on Marine Litter (2011) Marine litter: technical recommendations for the implementation of MSFD requirements. Joint Research Centre, Institute for Environment and Sustainability, LuxembourgGoogle Scholar
- 9.GESAMP (2015) Sources, fate and effects of microplastics in the marine environment: a global assessment. In: Kershaw PJ (ed) IMO/FAO/UNESCO-IOC/UNIDO/WMO/IAEA/UN/UNEP/UNDP Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection, GESAMP No. 90, p 96Google Scholar
- 23.van Sebille E, England MH, Froyland G (2012) Origin, dynamics and evolution of ocean garbage patches from observed surface drifters. Environ Res Lett 7(4)Google Scholar
- 31.Turra A et al (2014) Three-dimensional distribution of plastic pellets in sandy beaches: shifting paradigms. Sci Rep 4Google Scholar
- 40.European Commission (2012) Manifesto for a resource-efficient Europe. Brussels, p 2Google Scholar
- 41.STAP (2011) Marine debris as a global environmental problem: introducing a solutions based framework focused on plastic. In A STAP Information Document. Global Environment Facility, Washington, p 40Google Scholar
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