Bidirectional transfer of halogenated flame retardants between the gastrointestinal tract and ingested plastics in urban-adapted ring-billed gulls

The hypothesis that plastics can transfer chemical pollutants to organisms after ingestion has been supported by several lab and field studies. However, models indicate that this transfer could be bidirectional and that whether chemicals move from plastics to the animal or vice versa, depends on several factors, including the relative concentrations of chemicals in both the animal and the plastics ingested. To explore this phenomenon in the...