Contrasting time trends of organic contaminants in Antarctic pelagic and benthic food webs

► Levels of PCBs HCB en dieldrin decrease in Antarctic pelagic top-predators. ► Levels of PCBs and HCB do not decrease in Antarctic benthic species. ► Fluxes between Antarctic pelagic and benthic food webs are associated with sea-ice dynamics. ► Climate change may affect contaminant fluxes in Antarctica by impacting sea-ice dynamics. ► Antarctic biota are still final receptors of globally released organic contaminants.