Cited by 1,565Microplastics and Plastic PollutionTurtle Biology and ConservationOil Spill Detection and Mitigation

Monitoring the abundance of plastic debris in the marine environment

Open access
Ryan, Peter G., Moore, Charles J., van Franeker, Jan A., Moloney, Coleen L.·2009·Philosophical Transactions of the Royal Society B: Biological Sciences

Abstract

Plastic debris has significant environmental and economic impacts in marine systems. Monitoring is crucial to assess the efficacy of measures implemented to reduce the abundance of plastic debris, but it is complicated by large spatial and temporal heterogeneity in the amounts of plastic debris and by our limited understanding of the pathways followed by plastic debris and its long-term fate. To date, most monitoring has focused on beach surveys of stranded plastics and other litter. Infrequent surveys of the standing stock of litter on beaches provide crude estimates of debris types and abundance, but are biased by differential removal of litter items by beachcombing, cleanups and beach dynamics. Monitoring the accumulation of stranded debris provides an index of debris trends in adjacent waters, but is costly to undertake. At-sea sampling requires large sample sizes for statistical power to detect changes in abundance, given the high spatial and temporal heterogeneity. Another approach is to monitor the impacts of plastics. Seabirds and other marine organisms that accumulate plastics in their stomachs offer a cost-effective way to monitor the abundance and composition of small plastic litter. Changes in entanglement rates are harder to interpret, as they are sensitive to changes in population sizes of affected species. Monitoring waste disposal on ships and plastic debris levels in rivers and storm-water runoff is useful because it identifies the main sources of plastic debris entering the sea and can direct mitigation efforts. Different monitoring approaches are required to answer different questions, but attempts should be made to standardize approaches internationally.

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Crossref · 10.1098/rstb.2008.0207

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Authors
Ryan, P. G., Moore, C. J., van Franeker, J. A., & Moloney, C. L.
Affiliations
  • University of Cape Town (ZA)
  • Algalita Marine Research Foundation, 148 N. Marina Drive, Long Beach, CA 90803, USA
  • Wageningen IMARES, PO Box 167, 1790 AD Den Burg, Texel, The Netherlands
Venue
Philosophical Transactions of the Royal Society B: Biological Sciences
Published
2009-07-27
Volume
364
Issue
1526
Pages
1999-2012
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
OpenAlex
W2134877526
Cited by
1,565
References
100
Citations by year
2026: 59 · 2025: 103 · 2024: 147 · 2023: 174 · 2022: 155 · 2021: 143 · 2020: 141 · 2019: 138 · 2018: 101 · 2017: 90 · 2016: 71 · 2015: 57 · 2014: 55 · 2013: 54 · 2012: 29
FWCI
1.76
Type
journal article
Language
en
Open access
Locations
  • Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Socio-Environmental Systems Modeling (acceptedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • IOC of UNESCO (Intergovernmental Oceanographic Commission)
Funders
  • National Research Foundation
  • Interreg
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Turtle Biology and Conservation
  • Physical Sciences › Environmental Science › Pollution › Oil Spill Detection and Mitigation
Keywords
plastic debris, marine litter, plastic pollution monitoring, beach surveys, seabirds, plastic ingestion, entanglement, ship waste disposal, stormwater runoff, spatiotemporal heterogeneity
MeSH terms
Bathing Beaches, Environmental Monitoring, Environmental Pollutants, Oceans and Seas, Plastics, Waste Products, Water Movements, Ecosystem

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