Effects of polystyrene in the brackish water flea Diaphanosoma celebensis: Size-dependent acute toxicity, ingestion, egestion, and antioxidant response

•Nano-sized PS beads have longer retention time than micro-sized ones.•PS beads distribute in various tissues in D. celebensis depending on size.•PS beads cause changes in the antioxidant capacity.•PS beads induce size-dependent oxidative stress response, causing cellular damage. Owing to the increa...

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