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Nanoplastics Potentiate Mercury Toxicity in a Marine Copepod Under Multigenerational Exposure by Dongmei Xie; Hongmai Zhang; Hui Wei; Lin Lin; Dazhi Wang; Minghua Wang is a Environmental Science article available to read on EtoBox.

What is Nanoplastics Potentiate Mercury Toxicity in a Marine Copepod Under Multigenerational Exposure about?

The continuous fragmentation of plastics and release of synthetic nanoplastics from products have been aggravating nanoplastic pollution in the marine ecosystem. The carrier role of nanoplastics may increase the bioavailability and toxicity effects of toxic metals, e.g., mercury (Hg), which is of growing concern. Here, the copepod Tigriopus japonicus was exposed to polystyrene nanoplastics (PS NPs) and Hg (alone or combined) at environmental realistic concentrations for three generations (F0-F2). Then, Hg accumulation, physiological endpoints, and transcriptome were analyzed. The results showed that the copepod's reproduction was significantly inhibited under PS NPs or Hg exposure. The presence of PS NPs caused significantly higher Hg accumulation, lower survival, and lower offspring production in copepods relative to Hg exposure, suggesting an increased threat to the copepod's survivorship and health. From the molecular perspective, combined PS NPs and Hg caused a graver effect on the DNA replication, cell cycle, and reproduction pathways relative to Hg exposure, linking to lower levels of survivorship and reproduction. Taken together, this study provides an early warning of nanop

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Author

Dongmei Xie; Hongmai Zhang; Hui Wei; Lin Lin; Dazhi Wang; Minghua Wang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)