Demers Marc J, Kelly Erin N, Blais Jules M, Pick Frances R, St Louis Vincent L, Schindler David W
Centre for Advanced Research in Environmental Genomics, Department of Biology, University of Ottawa, 30 Marie Curie, Ottawa, Ontario, KIN 6N5, Canada.
Environ Sci Technol. 2007 Apr 15;41(8):2723-9. doi: 10.1021/es062428p.
The effect of altitude on the concentration and composition of organochlorine compounds (OC) in troutwas investigated along an elevation gradient of 1600 m in the Canadian Rocky Mountains. The eight lakes sampled were within or adjacent to national parks in sparsely settled parts of Alberta and British Columbia, thus contaminants were assumed to have derived from long-range atmospheric transport. Concentrations of several OCs in trout increased significantly with lake elevation. In general, these increases were most pronounced for the higher K(ow) pesticides (i.e., dieldrin and DDTs), and less pronounced for lower K(ow) pesticides (e.g., HCHs and HCB) and PCBs. Most OC concentrations in trout were inversely correlated with fish growth rate. Growth rate explained more of the variation for some OCs (particularly PCBs) than lake elevation. Differences in trophic position (indicated by delta15N) explained little of the variation in OC concentration in comparison to other factors such as lake elevation and the growth rate and age of trout. Using principal component analysis (PCA), we identified the importance of lake elevation and octanol/water partition coefficient (K(ow)) to the OC composition of trout.
在加拿大落基山脉，沿着1600米的海拔梯度，研究了海拔高度对鳟鱼体内有机氯化合物（OC）浓度和组成的影响。所采样的八个湖泊位于艾伯塔省和不列颠哥伦比亚省人口稀少地区的国家公园内或附近，因此假定污染物来自远距离大气传输。鳟鱼体内几种有机氯化合物的浓度随湖泊海拔显著增加。一般来说，这些增加在高K（ow）农药（即狄氏剂和滴滴涕）中最为明显，而在低K（ow）农药（如六氯环己烷和六氯苯）和多氯联苯中则不太明显。鳟鱼体内大多数有机氯化合物的浓度与鱼类生长速率呈负相关。与湖泊海拔相比，生长速率对某些有机氯化合物（特别是多氯联苯）的变异解释更多。与湖泊海拔、鳟鱼的生长速率和年龄等其他因素相比，营养级差异（由δ15N表示）对有机氯化合物浓度变异的解释很少。使用主成分分析（PCA），我们确定了湖泊海拔和正辛醇/水分配系数（K（ow））对鳟鱼有机氯化合物组成的重要性。
