Biology, Acadia University, 33 Westwood Avenue, Wolfville, NS B4P 2R6, Canada.
Biology, Acadia University, 33 Westwood Avenue, Wolfville, NS B4P 2R6, Canada.
Sci Total Environ. 2019 Nov 1;689:716-724. doi: 10.1016/j.scitotenv.2019.06.505. Epub 2019 Jun 30.
Contamination of Arctic marine environments continues to be a concern for wildlife managers. Because the Arctic is a sink for the long-range transport of persistent organic pollutants (POPs), many studies have detected high concentrations of POPs in various Arctic birds. In this study from high Arctic Canada, we show that male Arctic terns (Sterna paradisaea), which migrate from the Antarctic to the Arctic annually to breed, decline in concentrations of many hepatic POPs through the breeding season. This suggests that local Arctic food webs are less contaminated than regions where terns fed during or migration, despite that the terns appear to feed at a higher trophic level near their colony.
北极海洋环境的污染仍然是野生动物管理者关注的问题。由于北极是持久性有机污染物（POPs）长距离传输的汇，因此许多研究在各种北极鸟类中都检测到了高浓度的 POPs。在这项来自加拿大北极地区的研究中，我们表明，每年从南极迁徙到北极繁殖的北极燕鸥（Sterna paradisaea）的雄性个体在繁殖季节其体内多种肝脏 POPs 的浓度下降。这表明，尽管燕鸥在其繁殖地附近的食物链中处于较高的营养级，但当地的北极食物网的污染程度比燕鸥在繁殖期间或迁徙期间所摄取食物的地区要低。
