Organochlorine Compounds in Trout from Lakes over a 1600 Meter Elevation Gradient in the Canadian Rocky Mountains

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• 作者：Marc J. Demers ; Erin N. Kelly ; Jules M. Blais ; Frances R. Pick ; Vincent L. St. Louis ; David W. Schindler
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：April 15, 2007
• 年：2007
• 卷：41
• 期：8
• 页码：2723 - 2729
• 全文大小：172K
• 年卷期：v.41,no.8(April 15, 2007)
• ISSN：1520-5851

文摘

The effect of altitude on the concentration and compositionof organochlorine compounds (OC) in trout was investigatedalong an elevation gradient of 1600 m in the Canadian RockyMountains. The eight lakes sampled were within oradjacent to national parks in sparsely settled parts ofAlberta and British Columbia, thus contaminants wereassumed to have derived from long-range atmospherictransport. Concentrations of several OCs in trout increasedsignificantly with lake elevation. In general, these increaseswere most pronounced for the higher K_ow pesticides(i.e., dieldrin and DDTs), and less pronounced for lowerK_ow pesticides (e.g., HCHs and HCB) and PCBs. Most OCconcentrations in trout were inversely correlated with fishgrowth rate. Growth rate explained more of the variationfor some OCs (particularly PCBs) than lake elevation.Differences in trophic position (indicated by mages/gifchars/delta.gif" BORDER=0 >¹⁵N) explainedlittle of the variation in OC concentration in comparisonto other factors such as lake elevation and the growth rateand age of trout. Using principal component analysis(PCA), we identified the importance of lake elevation andoctanol/water partition coefficient (K_ow) to the OCcomposition of trout.