| rapidly increasing polybrominated diphenyl ether concentrations in the columbia river system from 1992 to 2000. | concentrations and congener patterns of 32 individual pbde congeners from mono- through hexa-brominated were investigated in two fish species occupying similar habitats--but having different diets and trophic levels--and surficial sediments from several locations on the major river system of western north america, the columbia river, in southeastern british columbia, canada. total pbde concentrations have increased by up to 12-fold over the period from 1992 to 2000 in mountain whitefish from the ... | 2003 | 12875385 |