Zebra mussels reroute contaminant flow through food chain

摘要

Conventional wisdom holds that contaminants such as PCBs accumulate up the aquatic food web,reaching the highest concentrations in the predatory fish at the top of the food chain.But not in Lake Michigan's Calumet Harbor-new research reveals that some smaller fish have higher PCB concentrations than the predators that eat them.The findings,presented at the Ecological Society of America meeting in Montreal in August,could mean that resource managers will have to revise fish advisories and sampling protocols for monitoring cleanups,experts say.