Quantitative Assessment of Current Risks to Harlequin Ducks in Prince William Sound, Alaska, from the Oil Spill.

Harlequin Ducks ( were adversely affected by the oil spill (EVOS) in Prince William Sound (PWS), Alaska, and some have suggested effects continue two decades later. We present an ecological risk assessment evaluating quantitatively whether PWS seaducks continue to be at-risk from polycyclic aromatic hydrocarbons (PAHs) in residual oil. Potential pathways for PAH exposures are identified for initially oiled and never-oiled reference sites.