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Size-Dependent Effects of Micro Polystyrene Particles in the Marine Copepod <i>Tigriopus japonicus</i>

Environmental Science & Technology 2013 886 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 60 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Oh Youn Kwon, Oh Youn Kwon, Jung-Hoon Kang, Jung-Hoon Kang, Kyun‐Woo Lee, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Kyun‐Woo Lee, Jung-Hoon Kang, Oh Youn Kwon, Oh Youn Kwon, Kyun‐Woo Lee, Kyun‐Woo Lee, Won Joon Shim Won Joon Shim Oh Youn Kwon, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Oh Youn Kwon, Won Joon Shim Kyun‐Woo Lee, Kyun‐Woo Lee, Jung-Hoon Kang, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Jung-Hoon Kang, Jung-Hoon Kang, Jung-Hoon Kang, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Oh Youn Kwon, Won Joon Shim Kyun‐Woo Lee, Kyun‐Woo Lee, Kyun‐Woo Lee, Oh Youn Kwon, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Kyun‐Woo Lee, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Kyun‐Woo Lee, Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim Won Joon Shim

Summary

Researchers tested three sizes of polystyrene microbeads on a marine copepod species and found that the smallest particles caused the most significant harm to survival, development, and reproduction. The copepods ingested all three sizes without showing any preference for food over plastic when algae were available. The study adds to growing evidence that nanoscale plastic particles may be more toxic than larger microplastics to small marine organisms critical to ocean food chains.

Polymers

Models

Invertebrate other

We investigated the effects of three sizes of polystyrene (PS) microbeads (0.05, 0.5, and 6-μm diameter) on the survival, development, and fecundity of the copepod Tigriopus japonicus using acute and chronic toxicity tests. T. japonicus ingested and egested all three sizes of PS beads used and exhibited no selective feeding when phytoplankton were added. The copepods (nauplius and adult females) survived all sizes of PS beads and the various concentrations tested in the acute toxicity test for 96 h. In the two-generation chronic toxicity test, 0.05-μm PS beads at a concentration greater than 12.5 μg/mL caused the mortality of nauplii and copepodites in the F0 generation and even triggered mortality at a concentration of 1.25 μg/mL in the next generation. In the 0.5-μm PS bead treatment, despite there being no significant effect on the F0 generation, the highest concentration (25 μg/mL) induced a significant decrease in survival compared with the control population in the F1 generation. The 6-μm PS beads did not affect the survival of T. japonicus over two generations. The 0.5- and 6-μm PS beads caused a significant decrease in fecundity at all concentrations. These results suggest that microplastics such as micro- or nanosized PS beads may have negative impacts on marine copepods.

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