Cited by 1,543Microplastics and Plastic PollutionPharmaceutical and Antibiotic Environmental ImpactsEnvironmental Toxicology and Ecotoxicology

Microplastics in freshwater ecosystems: what we know and what we need to know

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Wagner, Martin, Scherer, Christian, Alvarez-Muñoz, Diana, Brennholt, Nicole, Bourrain, Xavier, Buchinger, Sebastian, Fries, Elke, Grosbois, Cécile +7 more·2014·Environmental Sciences Europe

Abstract

BACKGROUND: While the use of plastic materials has generated huge societal benefits, the 'plastic age' comes with downsides: One issue of emerging concern is the accumulation of plastics in the aquatic environment. Here, so-called microplastics (MP), fragments smaller than 5 mm, are of special concern because they can be ingested throughout the food web more readily than larger particles. Focusing on freshwater MP, we briefly review the state of the science to identify gaps of knowledge and deduce research needs. STATE OF THE SCIENCE: Environmental scientists started investigating marine (micro)plastics in the early 2000s. Today, a wealth of studies demonstrates that MP have ubiquitously permeated the marine ecosystem, including the polar regions and the deep sea. MP ingestion has been documented for an increasing number of marine species. However, to date, only few studies investigate their biological effects. The majority of marine plastics are considered to originate from land-based sources, including surface waters. Although they may be important transport pathways of MP, data from freshwater ecosystems is scarce. So far, only few studies provide evidence for the presence of MP in rivers and lakes. Data on MP uptake by freshwater invertebrates and fish is very limited. KNOWLEDGE GAPS: While the research on marine MP is more advanced, there are immense gaps of knowledge regarding freshwater MP. Data on their abundance is fragmentary for large and absent for small surface waters. Likewise, relevant sources and the environmental fate remain to be investigated. Data on the biological effects of MP in freshwater species is completely lacking. The accumulation of other freshwater contaminants on MP is of special interest because ingestion might increase the chemical exposure. Again, data is unavailable on this important issue. CONCLUSIONS: MP represent freshwater contaminants of emerging concern. However, to assess the environmental risk associated with MP, comprehensive data on their abundance, fate, sources, and biological effects in freshwater ecosystems are needed. Establishing such data critically depends on a collaborative effort by environmental scientists from diverse disciplines (chemistry, hydrology, ecotoxicology, etc.) and, unsurprisingly, on the allocation of sufficient public funding.

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  • Field-measured microplastic concentrations in freshwater sediments are far below the calculated EC10 or EC50 effect thresholds for G. pulex.

    “Field measured concentrations in freshwater sediments2−4,7,8 although often provisional due to methodological limitations, are far below the calculated EC10 or EC50 effect threshold values for G. pulex.”

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  1. [12]GESAMP (IMO/FAO/UNESCO-IOC/UNIDO/WMO/IAEA/UN/UNEP Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection) Bowmer T Kershaw P Proceedings of the GESAMP international workshop on micro-plastic particles as a vector in transporting persistent, bio-accumulating and toxic substances in the oceans GESAMP Reports & Studies 2010 Paris UNESCO-IOC

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Authors
Wagner, M., Scherer, C., Alvarez-Muñoz, D., Brennholt, N., Bourrain, X., Buchinger, S., Fries, E., Grosbois, C., Klasmeier, J., Marti, T., Rodriguez-Mozaz, S., Urbatzka, R., Vethaak, A. D., Winther-Nielsen, M., & Reifferscheid, G.
Affiliations
  • Goethe University Frankfurt (DE)
  • Federal Institute of Hydrology (DE)
  • Agence de l'eau Loire-Bretagne (FR)
  • Bureau de Recherches Géologiques et Minières (FR)
  • Osnabrück University (DE)
  • Centro Interdisciplinar de Investigação Marinha e Ambiental (PT)
  • Deltares (NL)
  • DHI (DK)
Corresponding author
Wagner, Martin
Venue
Environmental Sciences Europe
Published
2014-07-09
Volume
26
Issue
1
Pages
12-12
ISSN
  • 2190-4715 (ISSN-L)
  • 2190-4707
OpenAlex
W2143362587
Cited by
1,543
References
75
Citations by year
2026: 105 · 2025: 173 · 2024: 180 · 2023: 175 · 2022: 189 · 2021: 190 · 2020: 186 · 2019: 109 · 2018: 96 · 2017: 66 · 2016: 51 · 2015: 18 · 2014: 2 · 2013: 1
FWCI
32.22
Type
journal article
Language
en
Open access
Locations
  • Environmental Sciences Europe (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • VU Research Portal (publishedVersion, other-oa)
  • HAL (submittedVersion)
  • Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt) (submittedVersion, cc-by)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
Keywords
microplastics, freshwater ecosystems, microplastic ingestion, freshwater invertebrates, fish, emerging contaminants, microplastic sources, environmental fate, microplastic abundance, combined chemical exposure, research gaps, environmental risk assessment

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