Cited by 65Microplastics and Plastic PollutionEnvironmental Toxicology and EcotoxicologyPharmaceutical and Antibiotic Environmental Impacts

Negative food dilution and positive biofilm carrier effects of microplastic ingestion by D. magna cause tipping points at the population level

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Amariei, Georgiana, Rosal, Roberto, Fernández-Piñas, Francisca, Koelmans, Albert A.·2022·Environmental Pollution

Abstract

Ingestion of microplastics by aquatic organisms is often harmful due to the dilution of their regular food with low-calorie microplastic particles, but can also be beneficial if nutritious biofilms are present on the microplastic surface. This begs the question: is ingestion of microplastic harmful or beneficial and can the net effect of the two mechanisms be quantified? Here, we quantified these harmful and beneficial effects on Daphnia magna, using dose-response tests with clean and biofouled microplastic respectively, and determined the trade-off between these counteracting effects. A population model was developed to calculate the isoclines for zero population growth, separating the regime where adverse food dilution dominated from that where the beneficial biofilm vector mechanism dominated. Our results show that the organisms grew better when exposed to biofouled microplastic compared to pristine microplastic. Very good model predictions (R2 = 0.868–0.991) of the effects of biofouled microplastic were obtained based on literature parameter values, with optimization required only for the two sub-model parameters driving the dose-effect relationships for pristine microplastic. These results contradict previous sudies were only pristine microplastic were used and demonstrate that the ruling paradigm of unambiguously adverse microplastic effects is not ecologically justifiable.

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Crossref · 10.1016/j.envpol.2021.118622

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Authors
Amariei, G., Rosal, R., Fernández-Piñas, F., & Koelmans, A. A.
Affiliations
  • Universidad de Alcalá (ES)
  • Wageningen University & Research (NL)
Corresponding author
Koelmans, Albert A.
Venue
Environmental Pollution
Publisher
Elsevier BV
Published
2022-02
Volume
294
Pages
118622
ISSN
0269-7491 (ISSN-L)
OpenAlex
W4200405944
Cited by
65
References
51
Citations by year
2026: 15 · 2025: 10 · 2024: 15 · 2023: 15 · 2022: 10
FWCI
2.48
Type
journal article
Language
en
Open access
Locations
  • Environmental Pollution (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • e_Buah (publishedVersion, cc-by-nc-nd)
  • Socio-Environmental Systems Modeling (acceptedVersion, cc-by)
  • Biblos-e Archivo (Universidad Autónoma de Madrid) (submittedVersion, public-domain)
  • Hispana (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, cc-by)
Funders
  • Comunidad de Madrid (S2018/EMT-4341)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (13940)
  • Ministerio de Economía y Competitividad (CTM2016-74927-C2-1/2-R, CTM2016, CTM2016-74927-C2-1, S2018/EMT-4341)
Topics
  • Physical Sciences › Environmental Science › Pollution › Microplastics and Plastic Pollution
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
Keywords
microplastics, Daphnia magna, biofilm, microplastic ingestion, population dynamics, tipping points, dose-response relationship, population models, aquatic invertebrates
MeSH terms
Microplastics, Animals, Daphnia, Eating, Water Pollutants, Chemical, Biofilms

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