Elevated temperature enhanced lethal and sublethal acute toxicity of polyethylene microplastic fragments in Daphnia magna

Joorim Na, Jinyoung Song, Jinho Jung

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Microplastic (MP) pollution poses a growing concern in freshwater ecosystems, which are further threatened by global warming. Thus, this study investigated the effect of elevated temperature (25 °C) on acute toxicity of polyethylene MP fragments to Daphnia magna over a 48 h period. At the reference temperature (20 °C), MP fragments (41.88 ± 5.71 µm) induced over 70 times higher lethal toxicity than that induced by MP beads (44.50 ± 2.50 µm), with median effective concentrations (EC50) of 3.89 and 275.89 mg L−1, respectively. Elevated temperature significantly increased (p < 0.05) the lethal (EC50 = 1.88 mg L−1) and sublethal (lipid peroxidation and total antioxidant capacity) toxicity in D. magna exposed to MP fragments compared to those at the reference temperature. Additionally, the elevated temperature led to a significant increase (p < 0.05) in the bioconcentration of MP fragments in D. magna. Overall, the present study increases understanding for the ecological risk assessment of microplastics under global warming, highlights that elevated temperature can be seriously increased bioconcentration of MP fragments, leading to increased acute toxicity in D. magna.

Original languageEnglish
Article number104212
JournalEnvironmental Toxicology and Pharmacology
Volume102
DOIs
Publication statusPublished - 2023 Sept

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government ( NRF- 2020R1A6A3A13061082 and NRF- 2022R1C1C2009130 ), and was supported by a Korea University Grant.

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Bioconcentration
  • Daphnid
  • Ecotoxicity
  • Microplastics
  • Oxidative stress
  • Temperature

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology
  • Health, Toxicology and Mutagenesis

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