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      Elemental composition of Usnea sp lichen from Potter Peninsula, 25 de Mayo (King George) Island, Antarctica.

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          Abstract

          Several pollutants, which include metals, are present in the Antarctic atmosphere, snow, marine and terrestrial organisms. This work reports the elements incorporated by Usnea sp thalli in Potter Peninsula, 25 de Mayo (King George) Island, South Shetlands, Antarctica. Geological origin was analyzed as possible sources of elements. For this purpose, correlations were done using a geochemical tracer, principal component analysis and enrichment factors were computed. Lithophile elements from particulate matter were present in most of the sampling sites. Bromine, Se and Hg showed the highest enrichment factors suggesting other sources than the particulate matter. Mercury values found in Usnea sp were in the same range as those reported for Deception Island (South Shetlands) and remote areas from the Patagonia Andes.

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          Affiliations
          [1 ] Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche (CAB), Comisión Nacional de Energía Atómica (CNEA), Av. Bustillo km 9.5, (8400) Bariloche, Argentina. Electronic address: bubachd@cab.cnea.gov.ar.
          [2 ] Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche (CAB), Comisión Nacional de Energía Atómica (CNEA), Av. Bustillo km 9.5, (8400) Bariloche, Argentina. Electronic address: spcatan@cab.cnea.gov.ar.
          [3 ] Laboratorio de Ecofisiología y Ecotoxicología, Instituto Antártico Argentino DNA, Cerrito 1248 (1010) Ciudad Autónoma de Buenos Aires, Argentina. Electronic address: carladifonzo@hotmail.com.
          [4 ] Laboratorio de Ecofisiología y Ecotoxicología, Instituto Antártico Argentino DNA, Cerrito 1248 (1010) Ciudad Autónoma de Buenos Aires, Argentina; Laboratorio de Ecotoxicología, Departamento de Biología, Universidad Argentina JF Kennedy, Sarmiento 4562, (1197), Ciudad Autónoma de Buenos Aires, Argentina. Electronic address: lapadop@gmail.com.
          [5 ] Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche (CAB), Comisión Nacional de Energía Atómica (CNEA), Av. Bustillo km 9.5, (8400) Bariloche, Argentina. Electronic address: arribere@cab.cnea.gov.ar.
          [6 ] Laboratorio de Ecofisiología y Ecotoxicología, Instituto Antártico Argentino DNA, Cerrito 1248 (1010) Ciudad Autónoma de Buenos Aires, Argentina; Laboratorio de Ecotoxicología, Departamento de Biología, Universidad Argentina JF Kennedy, Sarmiento 4562, (1197), Ciudad Autónoma de Buenos Aires, Argentina. Electronic address: martinansaldo@gmail.com.ar.
          Journal
          Environ. Pollut.
          Environmental pollution (Barking, Essex : 1987)
          Elsevier BV
          1873-6424
          0269-7491
          Mar 2016
          : 210
          26741560 S0269-7491(15)30205-0 10.1016/j.envpol.2015.11.045

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