Polychlorinated biphenyls and chlorinated pesticides in southern Ontario, Canada, green frogs
Journal Article
·
· Environmental Toxicology and Chemistry
- Simon Fraser Univ., Burnaby, British Columbia (Canada). School of Resource and Environmental Management
- Trent Univ., Peterborough, Ontario (Canada). Watershed Ecosystems Program
- Univ. of Windsor, Ontario (Canada)
Green frogs were collected from seven southern Ontario, Canada, locations and analyzed for chlorinated organic chemicals to establish the relative distribution of these chemicals at specific sites. At Hillman Marsh, a wildlife reserve in an agricultural area, green frogs accumulated significantly greater amount of highly chlorinated polychlorinated biphenyls (PCBs) than green frogs from all other collection sites. The source of PCBs is unknown. At Ancaster, 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE) accumulated in green frogs to a significantly greater extent than at all other sites. This was attributed to the presence of agriculture at Ancaster and the historic use of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) in agriculture. Chemical concentrations measured in green frogs from all locations were considerably lower than reported levels in other species resulting in observable effects. Specific data relating chronic effects in amphibians to environmental exposure to DDE and PCBs is lacking. Contaminant accumulation in southern Ontario amphibians may be an important factor contributing to amphibian declines only at specific sites.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 563944
- Journal Information:
- Environmental Toxicology and Chemistry, Journal Name: Environmental Toxicology and Chemistry Journal Issue: 11 Vol. 16; ISSN 0730-7268; ISSN ETOCDK
- Country of Publication:
- United States
- Language:
- English
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