Poblet A, Andrade S, Scagliola M, Vodopivez C, Curtosi A, Pucci A, Marcovecchio J
Universidad Nacional de Mar del Plata, Argentina.
Sci Total Environ. 1997 Nov 27;207(2-3):187-94. doi: 10.1016/s0048-9697(97)00265-9.
Trace-metal contents were recorded for the epilithic antarctic lichens Usnea aurantiacoatra and U. antartica, sampled close to the Argentine scientific station 'Jubany' on '25 de Mayo' (King George) Island, in the Southern Shetland Archipelago (Antarctica). The corresponding heavy-metal levels have been measured through atomic absorption spectrophotometry, following internationally accepted analytical methods. The results obtained support the hypothesis that an atmospheric circulation of trace metals exists on the assessed area, and the activities developed at the different scientific stations located on this island would be a potential source of heavy metals to the evaluated environment. The geographical distribution of trace metals atmospherically transported in the area close to 'Jubany Station' was studied through the corresponding metal contents of the assessed lichens. Finally, the suitability of both analyzed lichen species, Usnea aurantiacoatra and U. antartica, as biological indicators for quantitative monitoring of airborne metals for this antarctic environment was recognized.
对南极石生地衣橙黄松萝和南极松萝的痕量金属含量进行了记录，这些地衣样本采自南极南设得兰群岛乔治王岛“五月二十五日”（阿根廷科学考察站“朱巴尼”附近）。按照国际认可的分析方法，通过原子吸收分光光度法测定了相应的重金属含量。所得结果支持这样的假设：在评估区域存在痕量金属的大气环流，而位于该岛上不同科学考察站开展的活动可能是评估环境中重金属的潜在来源。通过所评估地衣的相应金属含量，研究了“朱巴尼站”附近区域大气中传输的痕量金属的地理分布。最后，确认了橙黄松萝和南极松萝这两种被分析的地衣物种作为该南极环境空气中金属定量监测生物指标的适用性。
