Siskiwit Lake

Lake Superior, Siskiwit Lake, Isle Royale, 1983, whole ... 

Swackhamer, D.L. and R.A. Hites. 1988. Occurrence and bioaccumulation of organochlorine compounds in fishes from Siskiwit Lake, Isle Royale, Lake Superior. Environ. Sci. Technol. 22 543-548. 

Czuczwa and Hites [20] also calculated fluxes of PCDD/Fs to Siskiwit Lake on Isle Royale, Lake Superior, 1920-1984, and for Lake Erie, 1950-1984. The Siskiwit profile showed a rapid increase in the PCDD/F flux in the 1950s and... 

Fig. 11 E-PCDDs and E-PCDFs concentrations (ngkg 1 dw) in a sediment core from Siskiwit Lake, Isle Royale, Lake Superior, 1888-1998 (from Baker and Hites [31])...

Fig. 11 Proportions of congeners of the sum of 20 chlorobornane/camphene congeners in lake trout from Lake Superior and Siskiwit Lake (Isle Royale) in samples collected during June 1998 from each lake. B7-1001 was not determined in the lake trout from Siskiwit Lake [74]...

Biomagnification factor (BMF) = concentration in lake trout (lipid weight) -t- by average concentration in smelt [49,74,139] or sculpin [5], For Siskiwit Lake the BMF was calculated for lake trout - lake whitefish [74]... 

So wurde der durch thermische Emissionsquellen gepragte, atmospharische Eintrag von PCDD/PCDF in dem durch Zu- oder Abfliisse unbeeinfluBten, sehr abgelegenen Siskiwit Lake in Kanada in einer vielbeachteten Arbeit von CZUCZWA et al. untersucht [Czuczwa et al. 1985]. 

Czuczwa JM, McVeety BD, Hites RA (1985), Chemosphere 14 623-626.. .Polychlorinated dibenzodioxins and dibenzofurans in sediments from Siskiwit Lake, Isle Royale ... 

Baker J. I. and Hites R. A. (2000b) Siskiwit Lake revisited time trends of polychlorinated dibenzo-/)-dioxin and diben-zofuran deposition at Isle Royale, Michigan. Environ. Set Technol 34, 2887-2891. 

The relative importance of wet and dry deposition in removing PAHs from the atmosphere varies with the individual PAH. For example, Perwak et al. (1982) estimated that a total of 23% of benzo[a]pyrene released to the atmosphere is deposited on soil and water surfaces. Dry deposition of benzo[a]pyrene adsorbed to atmospheric aerosols accounts for most of the removal wet deposition is less significant by a factor of 3-5. In a mass balance study of the atmospheric deposition of PAHs to Siskiwit Lake, which is located on a wilderness island in northern Lake Superior, dry aerosol deposition of particulate phase PAHs was found to be the predominant form of input to surface waters by an average ratio of 9 1 over wet deposition (McVeety and Hites 1988). 

Historical fluxes of dioxins and dibenzofurans to sediment cores from Lake Erie and Siskiwit Lake (Isle Royale Czuczwa Hites, 1986) suggest that the incineration of chloro-aromatics has been an important source of dioxins and dibenzofurans. In storm sewer and creek sediment samples from the Love Canal chemical dumpsite area in Niagara Falls, N.Y. concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin from 0.9 to 312 ng/g were found (Smith et al., 1983) this compound in the Love Canal area may be associated with a heavy, chlorinated, oily residue. 

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