Dushenko W T, Grundy S L, Reimer K J
Environmental Sciences Group, Royal Roads Military College, British Columbia, Canada.
Sci Total Environ. 1996 Sep 20;188(1):29-38. doi: 10.1016/0048-9697(96)05154-6.
Vascular plants collected at background locations in the Canadian Arctic were assessed as biological indicators of the aerial transport of contaminants from nearby military radar sites. Significantly higher levels of lead and PCBs were found in plants from site background areas (collected up to 10 km from any known sources of contamination) than remote locations (collected at least 20 km away from any human activity) which indicates that these contaminants are being aerially redistributed from the sites to plants in surrounding background areas. An analysis of individual PCB congener signatures in plant site background samples using principal components analysis (PCA) revealed that the past use of specific commercial PCB formulations at these sites, such as Aroclor 1260 on the east coast, is reflected in the PCB congener signature present in the plants. The implications of these findings in terms of elucidating sources and the distribution of contaminants in the Canadian Arctic are discussed.
对在加拿大北极地区背景地点采集的维管植物进行了评估，以作为附近军事雷达站点污染物空中传输的生物指标。与偏远地点（距离任何人类活动至少20公里处采集）相比，在站点背景区域（距离任何已知污染源10公里以内采集）的植物中发现铅和多氯联苯的含量明显更高，这表明这些污染物正在从站点向周围背景区域的植物进行空中重新分布。使用主成分分析（PCA）对植物站点背景样本中的单个多氯联苯同系物特征进行分析后发现，这些站点过去使用特定商业多氯联苯配方（如东海岸的氯丹1260）的情况反映在植物中存在的多氯联苯同系物特征中。讨论了这些发现在阐明加拿大北极地区污染物来源和分布方面的意义。
