Transfer of mercury in the marine food web of West Greenland.
Transfer of mercury in the marine food web of West Greenland.
复制标题
西格陵兰海洋食物网中汞的转移。
DOI：
10.1039/b704796g
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Hobson
中科院分区：
文献类型：
--
作者：
F. Rigét;P. Møller;R. Dietz;T. Nielsen;G. Asmund;J. Strand;M. Larsen;K. Hobson
测定了格陵兰岛中部3种无脊椎动物、5种鱼类、3种海鸟和3种海洋哺乳动物的总汞(THG)、甲基汞(MeHg)、氮(15)N和碳(13)C的稳定同位素，以研究汞在这一北极海洋食物网中的营养转移。食物网放大系数估计为三汞或甲基汞浓度(mg kg(-1)dw)与组织增量(15)N(每千人)之间的回归斜率，三汞为0.183(SE=0.052)，甲基汞为0.339(SE=0.075)。FWMF不仅与报告的其他北极海洋食物网可比，而且与次北极、东非和巴布亚新几内亚的淡水湖等截然不同的食物网可比。这表明在广泛的水生生物类群中汞同化和同位素(Delta(15)N)区分的类似机制，并强调了使用污染物和稳定同位素相结合的方法进行广泛的生态系统比较的可能性。
Total mercury (THg), methylmercury (MeHg) and stable isotopes of nitrogen (delta(15)N) and carbon (delta(13)C) were measured in three invertebrate, five fish, three seabird and three marine mammal species of central West Greenland to investigate trophic transfer of mercury in this Arctic marine food web. The food web magnification factor (FWMF) estimated as the slope of the regression between the natural logarithm of THg or MeHg concentrations (mg kg(-1) dw) and tissue delta(15)N ( per thousand) was estimated to 0.183 (SE = 0.052) for THg and 0.339 (SE = 0.075) for MeHg. The FWMFs were not only comparable with those reported for other Arctic marine food webs but also with quite different food webs such as freshwater lakes in the sub-Arctic, East Africa and Papua New Guinea. This suggests similar mechanisms of mercury assimilation and isotopic (delta(15)N) discrimination among a broad range of aquatic taxa and underlines the possibility of broad ecosystem comparisons using the combined contaminant and stable isotope approach.