SS3.14 An Interdisciplinary Journey Towards Integrated Aquatic Sciences: Homage to Jacob Kalff
Date: Thursday, June 13, 2002
Time: 11:30:00 AM
Location: Saanich
BlaisJM, University of Ottawa, Ottawa, Canada,
Seeing the light from atop the mountain: The progressive movement of persistent pollutants to cold environments.
Organochlorine pesticides and polychlorinated biphenyls (PCBs) are known to concentrate in cold environments as a result of progressive evaporation from warm regions, and condensation in colder regions. Their hydrophobicity causes them to assimilate rapidly in biological tissues, and as a result, they may be biomagnified in food chains. They reach concentrations in organisms from remote northern climates that are higher than those found in more industrialized parts of the world. Environmental processes responsible for this pattern of concentration in cold environments include distillation, biomagnification, and dissolution in remote environments. A multi-year program to study transport and fate of persistent organic pollutants in alpine environments has revealed a systematic contamination of these cold environments by these organochlorine compounds.