Compared with dry and wet deposition fluxes, air-water exchange flux cannot be directly measured experimentally. Its model-based calculation contains considerable uncertainty because of the uncertainties in input parameters. To capture the inherent variability of air-water exchange flux of PCBs across the lower Great Lakes and to calculate their annual gross volatilization loss, 57 pairs of air...

1 Technoimaging, 4001 South, 700 East, Suite 500, Salt Lake City, UT 84107, USA 2 University of Utah, 1450 East, 100 South Salt Lake City, UT 84102, USA. 3 Quantec Geoscience, 146 Sparks Ave, Toronto, Ontario M2H 2S4, Canada. * Corresponding author, E-mail: [email protected] Paradigm change in 3D inversion of airborne EM surveys: case study for oil sands exploration near Fort McMurray,...

Stephanodiscus niagarae populations in a core from Lake Ontario show systematic variation in radial puncta number and mean valve diameter. Puncta number is stable in specimens from samples deposited between 1720 and 1844. Puncta number gradually increases in samples deposited between 1860 and 1947, then increases rapidly to high numbers in samples deposited after 1964. Mean valve diameter is re...

1Canadian Wildlife Service, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington, Ontario L7R 4A6 2Lorax Environmental, 19 Te Toroa Drive, RD5 Lake Tarawera, Rotorua, New Zealand 3Pacific Wildlife Research Centre, 5421 Robertson Road, R.R. 1, Delta, British Columbia V4K 3N2 4Ecosystem Health Division, Environmental Conservation Branch, Environment Canada, 867 Lakeshore Road, P.O. B...

*Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada; ‡Molecular Medicine Program, Ottawa Health Research Institute, Ottawa, Ontario K1H 8L6, Canada; †Centre for Neuromuscular Disease, University of Ottawa, Ottawa, Ontario, Canada; §Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario, Canada; #Huntsman C...

High rates of nutrient loading from agricultural and urban development have resulted in surface water eutrophication and groundwater contamination in regions of Ontario. In Lake Simcoe (Ontario, Canada), anthropogenic nutrient contributions have contributed to increased algal growth, low hypolimnetic oxygen concentrations, and impaired fish reproduction. An ambitious programme has been initiate...

Sediment cores were taken in 2002 in Lakes Ontario and Erie at four locations. A total of 48 sediment samples were characterized, dated using 210Pb, and analyzed for 10 congeners of polybrominated diphenyl ethers (PBDEs) including BDE209 as well as 39 congeners of polychlorinated biphenyls (PCBs). The surficial concentrations of nine tri- through hepta-BDE congeners (sigma9PBDE) are 4.85 and 6....

An Avian BioAccumulation Model (ABAM) of persistent organic pollutant (POP) uptake and elimination in adult life-stage of birds was validated by simulation of concentrations of DDE, dieldrin, mirex, and HCB in herring gull eggs in Lake Ontario for the years 1985, 1990, and 1992. These chemicals represented a range of whole-body half-lives of 82-265 days in the gull. Dietary intake of POPs by a ...